Glasses

Abstract

Glasses that can be worn on the user's face to promote correction of the user's posture, and the glasses can be arbitrarily determined by the user at the stage when the user uses the glasses so as to obtain the correction effect of the posture desired by the user. The purpose is to provide such glasses. 【Solution means】 The glasses include a frame having a rim capable of holding a lens, and a prism lens that is detachably configured with respect to the rim and has a thickness that changes uniformly from one end to the other end. Further, the prism lens may be configured to be rotatable with respect to the rim.

Description

Technical Field

[0001] The present invention relates to glasses.

Background Art

[0002] Conventionally, it has been said that there is a close relationship between the human visual field and the body. For example, Patent Document 1 discloses glasses that can correct the wearer's posture by using a prism lens as the lens of the glasses and moving the wearer's visual field in accordance with the direction in which the base of the prism lens is provided. Further, Patent Document 2 discloses posture-correcting glasses in which a difficult-to-see area extending in the left-right direction is provided at a position shifted downward from the center of the lens. In Patent Document 2, as a result of the user trying to look at an area without a difficult-to-see area, a downward posture is assumed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the glasses described in the above patent documents, a constantly refracted visual field is projected onto the user's eyes, but there is a problem that the user does not always want to use glasses with prism lenses.

[0005] Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide glasses that allow the user to freely determine the refraction direction and do not require the use of prism lenses at all times.

Means for Solving the Problems

[0006] In order to solve the above problems, the glasses according to the present invention include a frame having a rim capable of holding a lens, and a prism lens that is detachably configured with respect to the rim and has a thickness that changes uniformly from one end to the other end.

[0007] In the above glasses, the prism lens and the rim may be circular, and the prism lens may be configured to be rotatable with respect to the rim.

[0008] In the above glasses, the prism lens may be composed of the prism lens and a frame body surrounding the prism lens in the circumferential direction, and may be attached to the rim by fitting the frame body to the rim.

[0009] In the above glasses, the frame body may include an edge portion that sandwiches the rim in the width direction, and among the edge portions, the edge portion closer to the user of the glasses may be configured to have a shorter length than the edge portion farther from the user.

[0010] In the above glasses, the frame body may include an edge portion that sandwiches the rim in the width direction, and a part of the edge portion may be configured to be shorter than another part in the circumferential direction.

[0011] In the above glasses, the frame body may be provided with a convex portion protruding in the rim direction, and a plurality of concave portions may be provided on the inner edge portion of the rim, and the convex portion may face the concave portion.

[0012] In the above glasses, the rim may be configured to be detachable with another lens instead of the prism lens.

[0013] In the above glasses, the other lens may be a lens for vision correction.

[0014] In the above glasses, a region dividing member that divides the prism lens into at least two regions may be provided with respect to the prism lens.

Advantages of the Invention

[0015] By adopting a prism lens for the lens of the glasses according to the present invention, the visible field of view can be shifted in one direction and incident on the user's eyes. As a result, according to the shifting direction, the user's posture can be corrected according to the one direction.

[0016] On the other hand, since the lens of the glasses according to the present invention is detachable from the glasses as described above, it is not necessary to always use a prism lens. Further, since the prism lens is detachable from the glasses, the refraction direction by the prism lens can be set in an arbitrary direction of the user, so that glasses using a prism lens in the direction where the desired effect of the user can be obtained can be provided.

Brief Description of the Drawings

[0017]

Figure 1

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Embodiments for Carrying Out the Invention

[0018] The glasses according to the present invention will be described in detail with reference to the drawings.

[0019] (Embodiment) FIG. 1 is a perspective view of glasses 1 according to the present invention.

[0020] As shown in FIG. 1, the glasses 1 have a structure in which two rims 10 are connected by a bridge 11, and temple pieces 12 extend from both ends of the two rims 10 to the temples 13 that are placed on the ears of the user who uses the glasses 1. Further, a nose pad 14 that contacts the user's nose and supports the glasses 1 may be provided on the rim 10.

[0021] The rim 10 is an annular member and is preferably a perfect circle.

[0022] The rim 10 is provided with a prism lens 2. The rim 10, the bridge 11, the temple 12, and the modern 13 are sometimes collectively referred to as the frame of the glasses. These members can be realized by various materials, may be realized by resin, wood, metal, etc., and may be realized by members used in general glasses.

[0023] The prism lens 2 is circular like the rim 10 so as to fit into the rim 10. Also, the prism lens 2 is a lens whose thickness changes uniformly from one end to the other end.

[0024] Figure 2 is a diagram showing the prism lens 2. Figure 2(a) is a front view of the prism lens 2. Figure 2(b) is a cross-sectional view when cut along the direction in which the thickness changes through the center of the circle of the prism lens 2, and is a cross-sectional view when cut along the A-A line in Figure 2(a). As described above, and as shown in Figure 2(b), the thickness of the prism lens 2 changes uniformly from one end to the other end. The example in Figure 2(b) shows an example where the thickness becomes thinner from the upper side of the paper surface to the lower side of the paper surface. Also, Figure 2(c) is a cross-sectional view when cut along a cross-sectional plane perpendicular to the cutting direction of the cross-sectional plane in Figure 2(b), and is a cross-sectional view when cut along the B-B line in Figure 2(a). As shown in Figure 2(c), in this case, the thickness of the prism lens 2 does not change.

[0025] As shown in Fig. 3(a), this prism lens 2 is configured to be detachable from the rim 10. Specifically, as shown in Figs. 2(a) and 3(a), the prism lens 2 is held by an annular portion 3 that covers the circumferential portion of the prism lens 2. The prism lens 2 may be adhered to the annular portion 3. The annular portion 3 holds the prism lens 2 and has elasticity such that it can be fitted by applying a certain amount of pressure to the rim 10, and also has rigidity such that it does not naturally fall off from the rim 10 when fitted to the rim 10. Hereinafter, the member combining the prism lens 2 and the annular portion 3 is referred to as a detachable lens 4a. The annular portion 3 may be realized by a resin material such as rubber or reinforced plastic as an example, but is not limited thereto.

[0026] Fig. 4 is a view showing a state in which the prism lens 2 is held by the annular portion 3. Fig. 4(a) is a front view, Fig. 4(b) is a rear view, and Fig. 4(c) is a side view showing an example of a cross-sectional view. As understood from Fig. 4(c), the edge portions 5 (5a, 5b) in the thickness direction of the annular portion 3 are configured to project in a direction from the center of the prism lens 2 toward the outside rather than the center portion in the thickness direction. That is, as shown in Fig. 4(c), a concave portion 6 is formed in the outer edge portion of the annular portion 3 so that a depression can be formed at the center in the thickness direction. Also, in Fig. 4(c), the left side of the drawing is the front side, and the right side of the drawing is the rear side. In this document, the front side refers to the side when the user is viewed from the front with the glasses 1 on, and the rear side refers to the opposite side. Therefore, the rear side is the side that can be seen when the user puts on the glasses 1.

[0027] Further, FIG. 5 shows a cross-sectional view of the rim 10 portion in a state where the detachable lens 4a is fitted to the glasses 1. As shown in FIG. 5, the rim 10 is fitted into the concave portion 6 of the annular portion 3, so that the detachable lens 4a is held by the rim 10 of the glasses 1. Further, since the edge portions 5 (5a, 5b) of the annular portion 3 sandwich the rim 10 from the front and rear, it is possible to prevent the detachable lens 4a from falling off the rim 10 by itself. As shown in FIG. 5, the rim 10 is sandwiched by the edge portion 5a and the edge portion 5b of the detachable lens 4a.

[0028] At this time, as shown in FIG. 4(c), the edge portion 5a of the annular portion 3 may be longer than the edge portion 5b. By configuring the annular portion 3 in this way, it is possible to make it difficult for the detachable lens 4a to fall out toward the user's eye side when the glasses 1 are worn, and it is possible to provide the user with glasses 1 having excellent safety when the user uses the glasses 1. In addition, the lengths of the edge portions 5a and 4b may be made uniform so that the detachable lens 4a can be attached to and detached from the rim from either the front side or the back side of the rim 10, and a configuration that pursues convenience when using the glasses 1 may be adopted.

[0029] The direction of the change in the thickness of the prism lens 2 with respect to the rim 10 of the detachable lens 4a is arbitrary for the user. Therefore, the detachable lens 4a can be freely attached and detached in the direction in which the effect desired by the user can be obtained, and it is possible to provide the user with glasses 1 having a high degree of freedom in use. Further, since the detachable lens 4a can be removed from the rim 10, if the user does not want to use the prism lens 2, the user may remove the detachable lens 4a from the glasses 1.

[0030] Here, by using the glasses 1 in which the detachable lens 4a provided with the prism lens 2 is fitted to the rim 10, the following effects can be given to the user depending on the orientation of the prism lens 2 with respect to the rim 10.

[0031] FIG. 6 is a diagram showing the state of the first example of the refraction of incident light in the glasses 1, and is a diagram for explaining the base left prism lens. Further, FIG. 7 is a diagram showing the state of the second example of the incident light in the glasses 1, and is a diagram for explaining the base right prism lens. FIG. 8 is a diagram showing the state of the third example of the refraction of incident light in the glasses 1, and is a diagram for explaining the base down prism lens. And FIG. 9 is a diagram showing the state of the fourth example of the refraction of incident light in the glasses 1, and is a diagram for explaining the base up prism lens.

[0032] The glasses 1 are worn on the user's face, face the user's eyes, and have a function of changing the direction of light from the outside world and inputting it into the user's eyes by the prism lens 2 held by the frame (rim 10). The prism lens 2 of the glasses 1 is composed of a prism structure. In this description, the prism structure refers to a structure having the property of refracting light such as a prism lens.

[0033] In FIGS. 6 to 9, for the sake of easy explanation, it is described that the pair of prism lenses 2 attached to the pair of rims 10 are attached so that the refraction angles are the same. Here, as shown in FIGS. 6 to 9, the refraction angle of the lens is the refraction angle of the light incident on the lens, and refers to the angle θ formed by the incident light on the lens and the outgoing light from the lens. The refraction angle of the prism lens 2 is assumed to be 0.5° to 20°, and particularly preferably 0.5° to 2°.

[0034] The prism lens 2 has a flat surface on the user side, and an inclined surface that is inclined with respect to the flat surface on the front side of the user. As a result, the thickness of the prism lens increases and decreases monotonically. That is, the thickness of the prism lens changes uniformly from a predetermined thickness x1 to a predetermined thickness x2 (x2 is a length different from x1). For example, the thickness may increase monotonically from the right side to the left side of the spectacle frame, or may decrease monotonically from the upper side to the lower side of the spectacle frame. The direction in which the thickness changes is arbitrary according to the direction in which the user wants to move the external field of view (the direction in which the posture is to be corrected).

[0035] The prism lens 2 is classified into a base left prism 2A, a base right prism 2B, a base down prism 2C, and a base up prism 2D according to the refracting direction. Note that since the prism lens according to the present embodiment rotates with respect to the rim, the refracting direction is not limited to up, down, left, or right, but since these cases are easy to understand the effects of the prism lens, these four patterns will be described as representatives.

[0036] In FIG. 6, the base left prism 2A will be described. As shown in FIG. 6, for the pair of prism lenses 2, when the user P1 uses them, the thickness increases from the right side to the left side as seen from the user P1. Such a prism lens 2 is called a base left prism 2A. Note that the side with the thickness of the lens is called the base, and the name of the lens is determined by which side the base is on.

[0037] In the case of the base left prism 2A, the visual information of the user P1 is input in a state shifted to the right side from the actual space. Therefore, the rotational movement of the eyeball in the right direction can be promoted.

[0038] To describe this point in detail, since the line of sight guides the walking motion, when the target object has moved to the right side, the walking motion in the right direction is promoted and the eyeball rotates to the right side.

[0039] A function of obtaining visual information about the destination ahead and a function of accurately controlling the rotation of the trunk using information on how much the eyeballs are moved (whether the eyeballs are rotated) to direct the line of sight in that direction become important. That is, a person walks using various information obtained from vision unconsciously. Also, the fact that the optic flow changes due to these changes means that walking changes. When walking changes, reconstruction of the internal loop and the external loop can be expected.

[0040] In addition, the body of the user P1 promotes right weighting during walking. As a result, the right half of the body is in a flexed and tense state as if going up a slope, and the left half of the body is in an extended and relaxed state as if going down a slope. This is called the antagonistic reciprocal movement by walking. This is due to the activation of the left cerebral cortex (PMRF: Ponto Medullary Reticular Formation) on the side opposite to the right side.

[0041] As described above, according to the glasses 1, the pair of prism lenses 2 can refract the incident light incident on each of them in the same direction. Therefore, the visual information input to the brain of the user P1 through vision is changed, and the spatial recognition of the user P1 is changed, so that the influence exerted by the visual information on the brain and body of the user P1 can be adjusted. This will be described in detail below.

[0042] Generally, humans determine their standing position based on visual information, vestibular sensation, and somatosensation. Therefore, various information input from vision affects the cerebral cortex and produces changes in the body's postural function. Furthermore, by changing the visual information and the recognition of space, it is possible to change the biased postural sensation toward the normal postural sensation that should originally exist.

[0043] That is, it can be expected that the posture of the body as output information will be changed at an unconscious level by the displacement of the external space input through vision due to the input information recognized as visual information.

[0044] For example, in the case where a patient complains of low back pain during walking due to strabismus, as a result of analyzing the walking motion by dividing it into the patient's walking cycle, a decrease in compensatory motion has been confirmed when the prism lens 2 is worn. The compensatory motion in this case refers to motions such as postural changes performed to compensate for strabismus.

[0045] Hitherto, for functional abnormalities found in walking motions, sports instructors and therapists have primarily considered correcting the abnormalities of walking motions as the output by muscles and have focused on improving muscle strength.

[0046] However, walking control involves not only muscle strength but also visual information, vestibular sensory information, and somatosensation. Also, in recent years, it has been confirmed that visual information is maximally utilized for the function of preventing disturbances in motion patterns from the repeatedly performed body control system, together with the body control system that enables the performance of ideal motions. Therefore, for strabismic patients, an approach of changing the spatial cognition function using the prism lens 2 can be expected to have a very large effect.

[0047] Also, ensuring the smoothness of eye movements results in the suppression of the tension of the suboccipital muscle group. Therefore, it is important that eye movements and head movements can be performed separately and independently. By using the prism lens 2 as in the glasses 1 of the present invention and minimizing the load on the eyes, it can be expected to obtain proper eye alignment. Here, eye alignment refers to the position of the eyes within the eye sockets.

[0048] Also, the tension during walking can be said to be a compensatory behavior of the body to obtain visual information other than grounding and ground recognition. That is, separating the movement of the eyes from the movement of the head (eye sockets) can reduce the sacrifice of other sensory organs and the muscle tension of the extensor muscle group in order to obtain vision.

[0049] Also, in the glasses 1 as shown in Fig. 6, when the base left prism 2A is used (when the detachable lens 4a is fitted into the rim 10 so as to be base left), the space moved to the right together with the target object is utilized, and the act of reaching for the target object is repeatedly learned. As a result, the user P1 can change the space that has become unrecognizable due to injury, disease, etc. with the prism lens 2, leading to improvement in various movements in daily life.

[0050] Specifically, patients with hemispatial neglect due to brain damage cannot recognize half of the visual field, greatly impairing their quality of life. Since they cannot recognize half of the visual field, it has a great impact on walking and movements. By using the prism lens 2 for hemispatial neglect due to brain damage, it is possible to contribute to the improvement of the client's QOL (Quality of Life).

[0051] Also, the position of the tongue in the mouth unconsciously is related to eye alignment. This is due to the simultaneous firing action by the brainstem. Therefore, it is possible to bring about a change in the position of the tongue by the prism lens 2.

[0052] In the case of the base left prism 2A, the user's tongue will move closer to the right side.

[0053] Next, the base light glasses 1 will be described with reference to Fig. 7. In the following description, the description of the same configuration and the same effect as the previous configuration will be omitted. Fig. 7 is a diagram showing the state of refraction of incident light in the glasses 1 using a prism lens having a base on the right side of the glasses.

[0054] In the pair of prism lenses 2 in the glasses 1 shown in Fig. 7, when the user P1 uses them, the thickness increases from the left side to the right side as seen from the user P1. Such a prism lens 2 is called a base light prism 2B.

[0055] In the case of the base light prism 2B, the visual information of the user P1 is input while being shifted to the left side of the actual space. Therefore, the rotational movement of the eyeball to the left can be promoted.

[0056] Also, the body of the user P1 promotes left weight during walking. As a result, the left half of the body is in a bent and tense state as if going up a slope, and the right half of the body is in an extended and relaxed state as if going down a slope. This is due to the activation of the right cerebral cortex on the side opposite to the left side.

[0057] As described above, when the base light prism 2B is used in the glasses 1 as shown in FIG. 7 (when the detachable lens 4a is fitted to the rim 10 so as to be the base light), the space shifted to the left together with the target object is utilized, and the action of reaching for the target object is repeatedly learned. By changing the bias of the space that has become unrecognizable with the prism lens 2, it is possible to lead to the improvement of various actions in daily life.

[0058] Originally, a person's right peripheral vision is superior to the left peripheral vision. This is related to the fact that the center of gravity is on the right, and is related to the fact that the function of the left cerebral cortex is more active than the function of the right cerebral cortex.

[0059] Also, in the case of the base light prism 2B, the tongue of the user P1 will move closer to the left side.

[0060] The moving direction of the visual field by the glasses 1 is not limited to left and right.

[0061] FIG. 8 is a diagram showing an example of the glasses 1 with base down having the lower side of the prism lens as the base. In the following description, the description of the same configuration and the same effect as the previous description will be omitted. FIG. 8 is a diagram showing the state of refraction of incident light in the glasses 1.

[0062] In the pair of prism lenses 2 in the glasses 1 shown in FIG. 8, the thickness increases from top to bottom. Such a prism lens 2 is called a base-down prism 2C.

[0063] In the case of the base-down prism 2C, the visual information of the user P1 is input in a state where it is shifted upward from the actual space. Therefore, the upward rotation movement of the eyeball can be promoted. Also, among the body of the user P1, the position of the head changes backward. Also, during walking, heel contact and flexion of the flexor group are promoted.

[0064] As described above, according to the glasses 1 fitted with the prism lens 2 in the aspect shown in FIG. 8, by suppressing the forward head in a state where the head is tilted forward with the neck, the forward head position of the head and neck can be suppressed, and the burden on the neck can be reduced.

[0065] For example, when the neck is tilted so that the head is located 10 cm forward from the neutral position, the burden on the neck increases by about 10 kg. As a result, the neutrality (appropriate posture) of the neck cannot be ensured, and pain in the neck, stiff shoulders, and blood flow in the carotid artery are inhibited, and blood flow to the brain decreases.

[0066] As a result, the function of continuous blood circulation cannot be maintained, and drowsiness and fatigue are likely to be felt. Forward head has a great influence on the respiratory function, so eliminating this is very important for maintaining the function of the eyes and the neck. The base-down prism 2C can be used to maintain these functions.

[0067] In addition, in order to prevent modern diseases, the effect of using spatial cognitive therapy with the base-down prism 2C can be expected. When the eyeball rotates downward or the eyeball is directed downward such as in forward head or prone position, it causes an increase in intraocular pressure leading to an elongation of the eye axis.

[0068] According to the base-down prism 2C, it is possible to support the upward rotation function of the eyeball and create an environment where the eye axis does not elongate, that is, it is difficult to become nearsighted.

[0069] These days, due to the influence of digital devices typified by smartphones, etc., there are many environments where people look at things up close, and the eyes tend to move downward exclusively. Since it has been reported that downward rotation of the eyes may inhibit the biting motion, especially the proper development of the upper jaw, it is expected that by using the base-down prism 2C, upward rotation of the eyes can be promoted and proper development of the upper jaw can be facilitated.

[0070] Also, generally, in many postures of looking at digital devices, the eyes are rotated downward. Downward rotation of the eyes refers to the movement of the eyes rotating downward within the eye socket. When the eyes rotate downward, a slight space is created behind the eye socket. If the eye pressure rises (stimulated by digital devices) in this state where the space is created, the eye axis may extend, potentially changing into a myopic eye.

[0071] Moreover, generally in the human body, when looking at something closer than 6 m, the accommodation action of the lens works, and the anteroposterior axis of the lens becomes longer. The anteroposterior axis of the lens refers to the anteroposterior thickness of the thickest central part of the lens.

[0072] Therefore, the flow of aqueous humor is inhibited and the eye pressure rises. Furthermore, downward rotation of the eyes is also a cause of forward head position. If this posture continues, blood flow to the eyes is inhibited due to the burden on the internal carotid artery, leading to the worst combination of a decrease in blood flow + an increase in eye pressure, which leads to glaucoma and, if it progresses, blindness.

[0073] Regarding such problems, the base-down prism 2C, which causes upward rotation of the eyes and suppresses the forward head position of the head and neck, is expected to be effective.

[0074] Also, under work such as desk work using smartphones or personal computers, an increase in eye pressure is a concern. By prescribing the base-down prism 2C, the horizontal reference line of the space can be raised. Thereby, it is expected to suppress the increase in eye pressure caused by downward rotation of the eyes and the eyes themselves facing downward, and protect the eye function from eye diseases such as glaucoma.

[0075] Also, in the case of the base-down prism 2C, the tongue of the user P1 will move closer to the upper side. There is a relationship between the movement of the tongue and the eyes. In this case, by rolling the eyes upward, the tongue is more likely to touch the palate in the oral cavity unconsciously. As a result, the position of the tongue in the mouth becomes an appropriate position, leading to an approach to change from mouth breathing to nasal breathing. Thereby, stabilization of the trunk and lower limb muscle strength, improvement of the forward head, and elimination of apnea syndrome in the low tongue position can be expected.

[0076] Also, by using the base-down prism 2C, the autonomic nerves can be adjusted in an unconscious state.

[0077] Modern people mainly tend to use their eyes in a way that causes the eyeballs to roll downward. The movement of the eyeballs rolling downward is controlled by the trochlear nerve and the oculomotor nerve. Among them, the trochlear nerve of the fourth cranial nerve, which is more dominant, is controlled by the sympathetic nerve. Therefore, when the eyeballs roll downward, the sympathetic nerve is always overactive.

[0078] On the other hand, the base-down prism 2C supports upward rolling of the eyeballs. The movement of upward rolling of the eyeballs is controlled by the oculomotor nerve of the third cranial nerve, and the oculomotor nerve is under parasympathetic nerve control. Therefore, by performing the movement of upward rolling of the eyeballs, it is possible to expect the effect of increasing the activity of the parasympathetic nerve.

[0079] Also, by using the base-down prism 2C, the optimization of the tongue position can be supported in an unconscious state. That is, due to the movement of upward rolling of the eyeballs, the tongue is displaced upward so as to contact the palate. When the tongue is in this position, a person unconsciously promotes nasal breathing, resulting in a parasympathetic nerve dominance.

[0080] Also, the frontal lobe of the brain consumes oxygen more easily and its activity does not stop during mouth breathing compared to nasal breathing. Conversely, when performing nasal breathing, the breathing rate can be reduced, and the effect of parasympathetic nerve dominance can be further expected.

[0081] In addition, the posture that gives priority to the flexion of the flexor muscles by using the base-down prism 2C can be expected to have the effect of suppressing the tension of the posterior mediastinum. Since the posterior mediastinum is a collection of sympathetic ganglia, by suppressing the tension of the posterior mediastinum, an effect of promoting inspiration during breathing can be expected.

[0082] By means of the above three actions of upward rotation of the eyeball, change in tongue position, and suppression of the tension of the posterior mediastinum, it is possible to create a parasympathetic-dominant state from the constantly sympathetic-dominant state, which is characteristic of modern people, and thus a very large effect can be expected in adjusting the balance of the autonomic nerves.

[0083] Next, the glasses 1 will be described with reference to FIG. 9. FIG. 9 is a diagram showing the state of refraction of incident light in the glasses 1 using prism lenses with the upper side of the glasses as the base.

[0084] In the pair of prism lenses 2 in the glasses 1 shown in FIG. 9, the thickness increases from the bottom to the top. Such a prism lens 2 is called a base-up prism 2D.

[0085] In the case of the base-up prism 2D, the visual information of the user P1 is input in a state shifted downward from the actual space. Therefore, the downward rotation movement of the eyeball can be promoted. Also, in the user P1's body, the position of the head changes forward. Also, during walking, suppression of heel contact and stretching of the extensor muscles are promoted.

[0086] In the case of the base-up prism 2D, the tongue of the user P1 will move closer to the lower side. There is a relationship between the movement of the tongue and the eyes, which leads to over-tension of the lower limb muscle groups, and for example, there is a possibility that the deliberately stable state can be disrupted. Scenes where such effects are expected include, for example, applications where people who have difficulty stretching the extensor muscles selectively use them in sports scenes and the like.

[0087] By using the glasses 1 with the prism lens fitted into the frame of the glasses in this way, the line of sight of the user can be guided according to the direction of the base of the lens. Therefore, by regularly using the glasses 1, the posture of the user can be naturally corrected in the direction desired by the user or the movement in that direction can be made easier.

[0088] Regarding FIGS. 6 to 9, for the sake of easy understanding of the explanation, an example in the case where the detachable lens 4a is fitted to the rim 10 and used in a manner in which the thickness of the prism lens 2 changes in the vertical and horizontal directions has been described. However, the direction of change in the thickness of the prism lens 2 of the detachable lens 4a may be an oblique direction. The detachable lens 4a may be fitted to the rim 10 so that the direction of change in the thickness of the prism lens 2 is in a mode that provides the effects preferred by the user in consideration of the effects obtained by the user with the glasses 1.

[0089] The glasses 1 using the prism lens 2 in this way can provide various functions to the user. However, the user does not always want to use the detachable lens 4a, that is, does not always want to continue using the glasses 1 with the prism lens 2 fitted. In some cases, there may be users who also want to use a lens other than the prism lens 2 in order to rest their eyes and brain.

[0090] Therefore, in the glasses 1 according to the present embodiment, as shown in FIG. 3(b), a detachable lens 4b other than the detachable lens 4a provided with the prism lens 2 may be fitted to the rim 10 of the glasses 1 instead of the detachable lens 4a. The detachable lens 4b other than the detachable lens 4a is a detachable lens using a lens different from the prism lens 2. For example, a simple glass plate (which may be plastic) with no change in thickness, colored glass (which may be plastic), a vision correction lens, a blue light cut lens, or other various types of lenses may be used as the detachable lens 4b held by the annular portion 3. When using a glass plate with no change in thickness instead of the prism lens 2, the glasses 1 can be used as decorative glasses. Also, when using colored glass (or plastic) instead of the prism lens 2, the glasses 1 can be used as colored glasses or sunglasses. Further, when using a vision correction lens instead of the prism lens 2, the glasses 1 can be used as ordinary vision correction glasses. By configuring the glasses 1 in this way, the glasses 1 can be used in the manner desired by the user at that time, and glasses 1 with various usage methods can be provided with a single pair of glasses 1. FIG. 3(b) illustrates, as an example, the case of using sunglasses as the detachable lens 4b.

[0091] In addition, as shown in FIG. 10, the detachable lens 4a may be configured to be rotatable with respect to the rim 10. FIG. 10 is a diagram showing that the detachable lens 4a is rotatable with respect to the rim 10, and the detachable lens 4a rotates in the direction indicated by the arrow 50 in the figure. That is, the outer edge of the detachable lens 4a rotates along the inner edge of the rim 10. That is, the detachable lens 4a may be configured to be rotatable with respect to the rim 10 while being fitted to the rim 10. The detachable lens 4 can be fitted to the rim 10 so that the thickness of the prism lens 2 changes in any direction of the user. However, in this case, it is not always possible to fit the detachable lens 4 to the rim 10 at a desired angle. And in that case, it is troublesome for the user to remove the detachable lens 4 from the rim 10 again and refit it. Therefore, as described above, the detachable lens 4 may be configured to be rotatable with respect to the rim 10. As described above, it is preferable that the outer edge of the detachable lens 4a and the inner edge of the rim 10 are perfect circles so that the detachable lens 4a can rotate with respect to the rim 10. Note that as long as it can rotate, the outer edge of the detachable lens 4a and the inner edge of the rim 10 do not have to be perfect circles, and some errors are acceptable.

[0092] The outer edge of the detachable lens 4a faces the inner edge of the rim 10, and the detachable lens 4a is a perfect circle, and the inner edge of the rim 10 is also a perfect circle, and the inner diameter of the rim 10 and the radius of the detachable lens 4a are configured to be substantially the same. Therefore, by manually sliding the outer periphery of the detachable lens 4a by the user himself / herself, the detachable lens 4a can be rotated with respect to the rim 10 as shown in FIG. 3(b). Further, by making the annular portion 3 of a material that is difficult to slide such as a rubber material, it can be made to slide (rotate) manually, but it cannot be easily rotated by other external forces.

[0093] However, in the case of this configuration, it cannot be said that there is no possibility that some external force other than the user's force acts and accidentally the detachable lens 4a rotates (shifts) with respect to the rim 10. The unexpected rotation of the detachable lens 4a by the user is not preferable because it may cause an effect different from the effect desired by the user.

[0094] Therefore, in the glasses 1, it is preferable that the detachable lens 4a is provided with a fixing function that allows it to be manually rotatable with respect to the rim 10 while being fixed so as not to rotate naturally.

[0095] Therefore, the glasses 1 may be provided with a rotation suppression mechanism so that the detachable lens 4a does not easily rotate. FIGS. 11 and 12 are diagrams for explaining the rotation suppression mechanism. FIG. 11(a) is a diagram showing a configuration example of the rim 10, where the left side is a view (rear view) as seen from the user side, and the right side is a cross-sectional view thereof. FIG. 11(b) is a diagram showing a configuration example of the detachable lens 4a, showing a state where the edge portion 5b is seen through, where the left side is a view (rear view) as seen from the user side, and the right side is a cross-sectional view thereof. FIGS. 12(a) and (b) are diagrams showing an example when the detachable lens 4a is fitted to the rim 10. In FIGS. 11 and 12, the connection portions of the rim 10 with the bridge 11 and the temple 12 are omitted.

[0096] In the rotation suppression mechanism, the inner edge portion of the rim 10 has a structure in which concavities and convexities are repeated along the inner edge as shown in FIG. 11(a), and a plurality of recesses 8 are provided. In FIG. 11(a), the reference numeral 8 is shown only for some of the recesses, not for all of them, considering the clarity of the drawing. Also, the number of the recesses 8 is not limited to the number shown in FIG. 11(a) and is arbitrary.

[0097] In contrast, a convex portion 9 is provided on the outer edge of the detachable lens 4a, that is, a part of the outer edge of the annular portion 3, as shown in Fig. 11(b). As shown in Fig. 12(a), this convex portion 9 fits into and faces one of the plurality of concave portions 8. When the convex portion 9 enters the concave portion 8, the convex portion 9 is inhibited by the end portion of the concave portion 8 and is not easily rotated. At this time, the convex portion 9 (annular portion 3) is realized by a material having a certain degree of elasticity as described above. The convex portion 9 may be realized by, for example, resin, or by a wire acting like a spring, or by a leaf spring arranged along the bottom surface portion of the concave portion 8 of the annular portion 3. Therefore, when the detachable lens 4a is rotated by human force, when the convex portion 9 approaches the end portion of the concave portion 8, it bends in the direction of the center of the prism lens 2 (or bends in the direction opposite to the rotation direction), so that the detachable lens 4a can rotate. In Fig. 11(b), an example in which two convex portions 9 are provided is shown, but the number of convex portions 9 is not limited to two. The number of convex portions 9 may be one, or three or more. When a plurality of convex portions 9 are provided, it is preferable that each convex portion 9 is arranged so as to fit into one of the concave portions 8 of the rim 10.

[0098] Fig. 12(b) shows an example of a state in which the detachable lens 4a is rotated by three concave portions 8 from the state of Fig. 12(a). In this way, the detachable lens 4a can be rotated with respect to the rim 10, and the rotation can also be suppressed by the interval of the concave portions 8.

[0099] Note that the concavo-convex structure on the inner edge portion of the rim 10 may be provided over the entire inner edge portion in the width direction of the rim 10, or may be provided only on a part of the inner edge portion in the width direction of the rim 10 (the surface side of the glasses 1 or the inner surface side of the glasses 1 (the side closer to the user or the inside of the rim 10)). In Fig. 11(a), an example in which a concavo-convex structure is provided closer to the user side in the width direction of the inner edge portion of the rim 10 is shown, and in Fig. 11(b), an example in which the convex portion 9 is provided closer to the user side in the detachable lens 4a is shown.

[0100] Needless to say, the detachable lens 4b may have the same configuration as the detachable lens 4a. That is, the detachable lens 4b is also manually rotatable with respect to the rim 10 and may be provided with a rotation suppression mechanism.

[0101] As described above, the rotation suppression mechanism can suppress the detachable lens 4a from rotating by itself.

[0102] Incidentally, Fig. 3 shows an example in which the edge 5b of the annular portion 3 of the detachable lens 4a is configured to be shorter overall than the edge 5a. As described above, this is a measure to facilitate fitting the detachable lens 4a onto the rim 10, but the edge 5b does not necessarily have to be shorter overall than the edge 5a. In other words, the edge 5b of the annular portion 3 of the detachable lens 4a does not necessarily have to protrude uniformly in the circumferential direction. That is, a part of the edge 5b of the annular portion 3 may be configured such that the length in the direction from the center of the prism lens 2 towards the outside is shorter than that of the other parts of the edge 5b. More specifically, as shown in Fig. 13(a), the distance d1 from the center of the annular portion 3 to one end may be configured to be shorter than the distance d2 to the other end. Note that Fig. 13(a) is a diagram showing a configuration example of the detachable lens 4a, and is a view (rear view) of the left side as seen from the user side. Also, the right side of Fig. 13(a) is a corresponding cross-sectional view (cross-sectional view of the right side view). Fig. 13(b) is a cross-sectional view when the detachable lens 4a shown on the left side of Fig. 13(a) is cut along the line B-B. As shown in Fig. 13(a), by making a part of the edge 5a of the detachable lens 4a shorter than the other part, the ease of fitting onto the rim 10 can be improved. In Fig. 13(a), an example is shown in which two portions of the edge 5a are configured to be shorter than the other parts, but the number of portions where the edge 5a is shortened is not limited to two. It may be one portion, or three or more portions. The more portions where the edge 5a is shortened, the easier it is to attach and detach the detachable lens 4a to and from the rim 10. On the other hand, the more portions where the edge 5a is shortened, the more likely it is to come off the rim 10. Also, the edge 5b may be configured to be shorter (lower) overall than the edge 5a. Also, after making the entire edge 5b shorter (lower) than the edge 5a, further, as shown in Fig. 13(a), a part of the edge 5b may be configured to be relatively shorter (lower). By configuring in this way, the ease of fitting from the side of the edge 5b onto the rim 10 of the glasses 1 can be improved. Also, the annular portion 3 does not necessarily have to be formed of a uniform resin as a whole.Specifically, among the annular portion 3, as the portions of the edge 5a and the edge 5b, the resin formulation may be changed so that their rigidity and elasticity are different. More specifically, the annular portion 3 may be configured such that the edge 5b is softer than the edge 5a (conversely, the edge 5a is harder than the edge 5b). By configuring the annular portion 3 such that the rigidity and elasticity of the edge 5a and the edge 5b are different in this way, the detachable lens 4 can be more easily fitted to the rim 10 of the glasses 1.

[0103] By the way, due to the characteristic that the thickness of the above-mentioned prism lens 2 changes uniformly from one end to the other end, the direction in which the visual field refracts is also limited to one direction. However, depending on the user who uses the glasses 1, there may be users who want to receive not only the efficacy in one direction but also multiple efficacies simultaneously. As an example for realizing such a configuration, it is conceivable to use a plurality of prism lenses stacked on top of each other. In this case, however, the glasses 1 become heavier accordingly, and the structure of the rim for holding the prism lenses becomes complicated, or the structure of the annular portion becomes complicated. Therefore, it is not preferable to use a plurality of prism lenses stacked on top of each other. Also, when using a plurality of prism lenses stacked on top of each other, there is also a problem that the appearance is not good because the thickness increases in the lens portion accordingly.

[0104] Therefore, as shown in FIGS. 14(a) and 14(b), an area dividing member 160 may be provided on the prism lens 2 of the glasses 1. FIG. 14(a) is a perspective view of the glasses 1 with the area dividing member 160 provided on the prism lens 2, and FIG. 14(b) is a front view of the glasses 1 with the area dividing member 160 provided on the prism lens 2. The area dividing member 160 is an elongated member as shown in the figure. The length of the area dividing member 160 is long enough for the user of the glasses 1 to recognize that the prism lens 2 is divided into two areas, and its width only needs to be wide enough for the user to recognize that it exists there. As shown in FIG. 14, the area dividing member 160 may or may not reach from one end to the other end of the rim 10, or may be provided so as to connect the ends of the rim 10. The width of the area dividing member 160 may be, for example, 0.5 mm to 1 mm, or may be about 2 mm.

[0105] The area dividing member 160 is a member that can divide the visual field that a user can see through the prism lens 2 into at least two areas. In the example of Fig. 14(b), an example is shown in which the prism lens 2 is divided into two upper and lower areas 161 and 162 by the area dividing member 160. The area dividing member 160 is provided on the prism lens 2 such that the area of either the area 161 or the area 162 is larger than the other. For example, as shown in Fig. 14(b), this area dividing member 160 divides the prism lens 2 into the area 161 and the area 162 formed by the area dividing member, and the areas are made to have a size difference (in the case of Fig. 14(b), the area 161 > the area 162). When there is a foreign object in the visual field, the human eye has the habit of looking at things while avoiding the foreign object. At the same time, the human eye tries to secure as wide a visual field as possible. As a result, an attempt is made to secure the visual field through the larger of the two areas formed by the area dividing member 160. Specifically, an attempt is made to look at things with the line of sight passing near the center of the larger area.

[0106] Specifically, the case with and without the area dividing member 160 will be described with reference to Fig. 15. Fig. 15(a) is a side view schematically showing the line-of-sight direction when a user wears normal glasses 1. As shown in Fig. 15(a), usually, a user wearing glasses with a frame (even when there is no frame, the outer edge of the lens corresponds to the frame) generally looks at an object with the center of the lens in sight. That is, as shown in Fig. 15(a), the user looks at an object (obtains visual information) with the line of sight G1 passing through the center C1 of the glasses 1.

[0107] On the one hand, FIG. 15(b) is a side view schematically showing the relationship between the user's line of sight G2 and the glasses 1 when the user wears the glasses 1 equipped with the region dividing member 160. As shown in FIG. 15(b) and also in FIG. 14(b), the glasses 1 shown in FIG. 15(b) illustrate the case where a region dividing member 160 extending in the left-right direction is provided for the prism lens 2 so as to divide the prism lens 2 into two upper and lower regions. As shown in FIG. 15(b), when there is the region dividing member 160, since the user does not want to have foreign objects in his / her field of view as much as possible when looking at an object, the user tries to look at the object so that the region dividing member 160 does not enter the field of view as much as possible. As a result, the user unconsciously (or consciously) looks at the center of a region 161 wider than the region 162 shown in FIG. 14(b) in order to obtain more, that is, a wider range of visual information when looking at an object. Therefore, as shown in FIG. 15(b), the user looks at the object so that at least the vertical center C2 of the region 161 passes through his / her line of sight G2.

[0108] FIG. 15(b) also shows the user's line of sight G1 when there is no region dividing member 160. However, as is clear from comparing the line of sight G1 and the line of sight G2, when there is the region dividing member 160, the user's line of sight comes to obtain visual information through the region 161, so it turns upward. That is, compared with the case where there is no region dividing member 160 in the glasses 1, when there is the region dividing member 160 in the glasses 1, the upward rotation movement of the user's eyeball can be promoted. As a result, the visual information obtained by the line of sight G2 has a smaller amount of information on the lower side in the line of sight direction than the visual information obtained when there is no region dividing member 160. As a result, in order to obtain more information on the lower side in the line of sight direction, the user naturally assumes a posture of pulling in the chin.

[0109] In FIG. 15(b), for the sake of clarity regarding the user's line of sight, an example was described in which the prism lens 2 is divided in the vertical direction, that is, a region dividing member 160 extending in the left-right direction with respect to the prism lens 2 is used. However, the position (direction of extension) where the region dividing member 160 is provided is of course not limited to the examples in FIGS. 14 and 15(b). The prism lens 2 may be divided not only in the vertical direction by the region dividing member 160 but also in the left-right direction or arranged to be divided obliquely. Also, in the example of FIG. 14(b), the region dividing member 160 may be arranged such that the upper side (region 161) has a smaller area than the lower side (region 162). Further, when dividing the prism lens 2 into left and right, that is, when providing a vertically long region dividing member 160 on the prism lens 2, for the regions divided into left and right, the right side may have a larger area or the left side may have a larger area. That is, the vertically long region dividing member 160 may be provided closer to the left or closer to the right of the prism lens 2.

[0110] When the region dividing member 160 is arranged as in FIG. 14(b), it was described that the user's eyes are rolled upward. On the other hand, when the region dividing member 160 extending left and right as shown in FIG. 14(b) is arranged closer to the upper side of the prism lens 2, naturally, conversely, the user's eyes will be rolled downward. Also, when the vertically long region dividing member 160 is arranged closer to the right (closer to the left as seen from the user) in the state where the glasses 1 are viewed frontally, the user's eyes will be rotated to the right. Conversely, when the vertically long region dividing member 160 is arranged closer to the left (closer to the right as seen from the user), the user's eyes will be rotated to the left. That is, the region dividing member 160 can be expected to have the effect of naturally rotating the user's eyes in an arbitrary direction. From this, the region dividing member 160 can be described as having an effect similar to the effect exhibited by the prism lens 2.

[0111] That is, as shown in FIG. 14(b), when the region dividing member 160 is disposed closer to the bottom of the prism lens 2, since it prompts the user to roll their eyes upward, the same effect as a base-down prism can be expected. Also, when the region dividing member 160 is disposed closer to the top of the prism lens 2, since it prompts the user to roll their eyes downward, the same effect as a base-up prism can be expected.

[0112] Further, when the region dividing member 160 is disposed to the right of the prism lens 2 in a front view (the region dividing member 160 is located to the left as seen from the user), since the user's eyes are guided to the right, it will prompt the user to rotate their body to the right, and the same effect as a base-left prism can be expected. When the region dividing member 160 is disposed to the left of the prism lens 2 (the region dividing member 160 is located to the right as seen from the user), since the user's eyes are guided to the left, it will prompt the user to rotate their body to the left, and the same effect as a base-right prism can be expected.

[0113] The position may be changed according to which direction the user's eyeballs are desired to be rotated more easily, and thereby how the user's posture is desired to be normalized. Depending on the position of the region dividing member 160, the intensity of the correction varies. The closer it is to the center of the lens, the greater the amount the user moves their line of sight (eyeballs), and as a result, the intensity of the posture correction by the region dividing member 160 can be increased.

[0114] Also, depending on the arrangement of the region dividing member 160 with respect to the prism lens 2, it is possible to either enhance the effect of the prism lens 2 or, conversely, suppress the effect of the prism lens 2 that is too effective. Taking FIG. 14(b) as an example, when the region dividing member 160 is provided at the position shown in FIG. 14(b), and at this time, if the prism lens 2 is in the base-down prism state, the region dividing member 160 can enhance the effect that the prism lens 2 as a base-down prism has on the user. Also, when the region dividing member 160 is provided at the position shown in FIG. 14(b), and at this time, if the prism lens 2 is in the base-up prism state, the region dividing member 160 can suppress the effect that the prism lens 2 as a base-up prism has on the user.

[0115] Furthermore, by providing the region dividing member 160 such that the changing direction of the thickness of the prism lens 2 is at a different angle, while the prism lens 2 can only give the user a change in one direction, by using the region dividing member 160, a change in the second direction can be given to the user. Also, the region dividing member 160 may be provided at any angle with respect to the prism lens 2, and if the desired effect of the user can be obtained, it may be provided obliquely in the front view with respect to the rim 10.

[0116] Here, as the region dividing member 160, a seal that can be adhered to the prism lens 2 is assumed, but the region dividing member is not limited to a seal. As other examples, the region dividing member may be realized by, for example, a resin material that can be attached to the prism lens 2, or may be realized by the same material as the rim 10 as a detachable part with respect to the rim 10. Alternatively, the region dividing member 160 may be realized by a rubber or string wound around the rim 10 and used.

[0117] (Summary) As described above, the glasses 1 according to the present invention can be freely attached in a manner that the user can change the visual field in the desired direction by using the detachable lens 4a provided with the prism lens 2. Therefore, it is possible to provide the glasses 1 using the highly convenient prism lens 2. Further, since the detachable lens 4a can be freely rotated by the user's force (manual force) with respect to the rim 10 of the glasses 1, when the user does not like the inclination direction of the prism lens 2, the detachable lens 4a can be rotated and easily adjusted. Further, it can also be utilized as the glasses 1 that do not use the prism lens 2 instead of the detachable lens 4a. Further, by attaching the region dividing member 160 to the prism lens 2, it is possible to facilitate correction in a shape desired by the user in combination with the prism lens 2.

[0118] (Supplementary) The glasses 1 shown in the above embodiment merely show one aspect of the glasses according to the present invention, and are not limited to the aspect shown in the above embodiment. Hereinafter, various modifications will be described.

[0119] (1) The prism lens 2 (hereinafter, simply referred to as the prism lens in this modification) shown in the above embodiment may be colorless and transparent or colored and transparent. For example, when the prism lens is made red transparent, it can be expected to make the sympathetic nerve of the user P1 (see FIG. 2) dominant over the parasympathetic nerve and promote the secretion of adrenaline.

[0120] Further, such secretion of adrenaline can increase the pulse rate and respiratory rate of the user P1. As a result, an effect of increasing the perceived temperature and promoting blood flow is expected. Therefore, it is recommended when feeling cold in the body, when more vitality and confidence are desired, or when it is desired to activate energy.

[0121] Further, for example, when the prism lens is made yellow transparent, it can stimulate the left brain of the user P1 and improve the rotation of the head. As a result, positive sinking can be induced and the communication ability can be enhanced, and it is recommended, for example, when standing in front of people.

[0122] Furthermore, effects such as improving appetite and activating the movement of the digestive system can also be expected. This is because it can act on the endocrine system to promote the secretion of growth hormone.

[0123] Also, for example, when the prism lens is made green and transparent, it becomes an intermediate color between warm and cool colors, and a sense of calmness and security can be obtained due to less stimulation. Also, since green has been said to have the effect of resting the eyes since ancient times, it is expected that fatigue can be reduced by looking straight ahead through a green transparent prism lens.

[0124] Also, for example, when the prism lens is made blue and transparent, it is expected to dominate the parasympathetic nerve and calm the excitement of the nerves. Therefore, it is expected to lower blood pressure, pulse, and body temperature and relax the mind and body. It is recommended when suffering from insomnia or when you want to enhance calm judgment and observation ability and face things carefully.

[0125] Also, for example, when the prism lens is made pink and transparent, it is expected to promote the secretion of female hormones. Therefore, it is recommended when you want to feel feminine, when you are in love, or when you are troubled by gynecological problems.

[0126] Also, for example, when the prism lens is made purple and transparent, it is a color in which colors with greatly different color tones such as red and blue are mixed, and it has the function of improving the power of healing and intuition, and is recommended when the mind is in a state of conflict.

[0127] In this way, by making the lens colored and transparent, effects other than line-of-sight induction and posture correction can be achieved.

[0128] (2) In the above-described embodiment, the detachable lens 4a is fitted to the rim 10 and is configured to rotate with respect to the rim 10. However, the implementation examples of the configuration for rotating the detachable lens 4a with respect to the rim 10 are not limited to this. For example, in the above-described embodiment, the annular portion 3 is used as the frame of the glasses 1 in a state where it is fitted to the rim 10. Then, with respect to this frame, another annular portion for holding the prism lens 2 or the prism lens 2 may be directly fitted to the annular portion 3 attached to the glasses 1. In this case, the annular portion 3 originally attached to the rim 10 of the glasses 1 rotates.

[0129] (3) Not limited to the above-described modification examples, these modification examples may be selected and appropriately combined, or other modifications that can guide the line of sight of the user, force the posture, or assist in movement may be applied to the glasses.

Explanation of Reference Numerals

[0130] 1 Glasses 2 Prism lens 3 Annular portion 4a, 4b Detachable lens 5a, 5b Edge portion 6 Concave portion 8 Concave portion 9 Convex portion 10 Rim 11 Bridge 12 Temple 13 Modern 14 Nose pad 160 Region dividing member

Claims

1. a frame having a rim capable of holding a lens; A pair of spectacles comprising a prism lens that is detachably attached to the rim and has a thickness that changes uniformly from one end to the other end, the prism lens and the rim are circular; The prism lens is configured to be rotatable relative to the rim, the prism lens includes a prism lens and a frame body that surrounds the prism lens in a circumferential direction, and is attached to the rim by fitting the frame body to the rim, The frame body includes an edge portion that holds the rim in a width direction, The edge portion closer to the user of the spectacles is shorter in length than the edge portion farther from the user. glasses.

2. The frame body includes an edge portion that holds the rim in a width direction, A portion of the edge portion is configured to be shorter than another portion in the circumferential direction.

2. The eyeglasses according to claim 1 .

3. The frame body is provided with a protrusion protruding toward the rim, The inner edge of the rim is provided with a plurality of recesses; The protrusion faces the recess.

2. The eyeglasses according to claim 1 .

4. The rim is configured so that another lens can be detachably attached in place of the prism lens.

2. The eyeglasses according to claim 1 .

5. The other lens is a lens for vision correction.

5. The eyeglasses according to claim 4.

6. A region dividing member is provided for the prism lens to divide the prism lens into at least two regions. The eyeglasses according to any one of claims 1 to 5.

Images