Spectacles

Abstract

The purpose of the present invention is to provide spectacles which can be worn on the face of a user to promote correction of the posture of the user and which can be arbitrarily determined by a user at a stage where the user uses the spectacles so as to obtain the posture correction effect desired by the user. The spectacles include frames having rims capable of holding lenses, and prism lenses configured to be attachable to and detachable from the rims, the prism lenses having a thickness that changes uniformly from one end to the other end. The prism lenses may be configured to be rotatable with respect to the rims.

Description

glasses

[0001] The present invention relates to eyeglasses.

[0002] It has been said that there is a close relationship between a person's field of vision and their body. For example, Patent Document 1 discloses eyeglasses that use prism lenses to shift the wearer's field of vision according to the direction in which the base of the prism lens is located, thereby correcting the wearer's posture. Furthermore, Patent Document 2 discloses posture-correcting eyeglasses that have a difficult-to-see area that extends in the left-right direction and is located below the center of the lens. Patent Document 2 states that the user will attempt to look at an area without the difficult-to-see area, resulting in a downward posture.

[0003] International Publication No. 2020 / 174636 Japanese Patent Application Laid-Open No. 2012-73485

[0004] However, with the glasses described in the above patent documents, a refracted field of view is always projected onto the user's eyes, but there is a problem in that users do not necessarily want to use glasses that use prism lenses all the time.

[0005] The present invention has been made in consideration of the above problems, and aims to provide eyeglasses that allow the user to freely determine the direction of refraction, but do not require the use of prism lenses at all times.

[0006] In order to solve the above problem, the eyeglasses of the present invention comprise a frame having a rim capable of holding a lens, and a prism lens that is detachable from the rim and has a thickness that varies uniformly from one end to the other.

[0007] In the above eyeglasses, the prism lens and the rim may be circular, and the prism lens may be configured to be rotatable relative to the rim.

[0008] In the above eyeglasses, the prism lens may be made up of a prism lens and a frame that surrounds the prism lens in the circumferential direction, and the frame may be attached to the rim by fitting it into the rim.

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

[0010] In the above eyeglasses, the frame may have edges that sandwich the rim in the width direction, and a portion of the edges may be configured to be shorter in the circumferential direction than another portion.

[0011] In the above eyeglasses, the frame may be provided with a convex portion that protrudes toward the rim, and the inner edge of the rim may be provided with a plurality of concave portions, the convex portions facing the concave portions.

[0012] In the above eyeglasses, the rim may be configured to allow other lenses to be attached and detached in place of the prism lenses.

[0013] In the above eyeglasses, the other lenses may be lenses for vision correction.

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

[0015] The eyeglass lenses of the present invention employ prism lenses, which allow the field of view to be shifted in one direction before entering the wearer's eyes, thereby correcting the wearer's posture in accordance with the direction of the shift.

[0016] On the other hand, the eyeglass lenses according to the present invention are detachable from the eyeglasses as described above, so that the prism lenses do not need to be used all the time. Also, because the prism lenses are detachable from the eyeglasses, the direction of refraction by the prism lenses can be adjusted to any direction desired by the user, so eyeglasses can be provided that use prism lenses oriented in a direction that provides the desired effect.

[0017] 4(a) and 4(b) are perspective views of eyeglasses. FIG. 4(a) is a front view of a prism lens. FIG. 4(b) is a first cross-sectional view of the prism lens. FIG. 4(c) is a second cross-sectional view of the prism lens. FIG. 4(a) is a view showing that the prism lens is configured to be detachable from the eyeglasses. FIG. 4(b) is a view showing that another lens is configured to be detachable from the eyeglasses. FIG. 4(a) is a front view of a prism lens held by a circular ring portion. FIG. 4(b) is a rear view of FIG. 4(a). FIG. 4(c) is a second cross-sectional view of the prism lens. FIG. 4(c) is a cross-sectional view showing the fitting state of a detachable lens to a rim. FIG. 4(a) is a view showing a first example of the refraction of incident light in prism eyeglasses (prism structure). FIG. 4(b) is a view showing a second example of the refraction of incident light in prism eyeglasses. FIG. 4(c) is a view showing a third example of the refraction of incident light in prism eyeglasses. FIG. 4(c) is a view showing a fourth example of the refraction of incident light in prism eyeglasses. FIG. 4(a) is a view showing that a detachable lens is configured to be rotatable relative to the rim of the eyeglasses. FIG. 4(a) is a view showing an example of the configuration of the rim. FIG. 4(b) is a view showing an example of the configuration of the detachable lens. 1A is a diagram showing an example of a state in which a detachable lens is fitted onto a rim; FIG. 1B is a diagram showing an example of a state in which the detachable lens has been rotated from the state in FIG. 1A is a diagram showing an example of the configuration of a detachable lens; FIG. 1B is a diagram showing a cross-sectional view of the detachable lens at a position different from that in FIG. 1A; FIG. 1A is a perspective view showing an example in which an area dividing member is provided on eyeglasses; FIG. 1B is a front view showing areas when an area dividing member is provided on eyeglasses; and FIG. 1B is a diagram for explaining the effect of an area dividing member, where FIG. 1A is a diagram for explaining the line of sight when an area dividing member is not provided, and FIG. 1B is a diagram for explaining the line of sight when an area dividing member is provided.

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

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

[0020] 1, eyeglasses 1 have a structure in which two rims 10 are connected by a bridge 11, and temples 12 extend from both ends of the two rims 10 to ear tips 13 that are placed on the ears of a user wearing eyeglasses 1. In addition, the rims 10 may be provided with nose pads 14 that come into contact with the user's nose and support eyeglasses 1.

[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, bridge 11, temples 12, and end pieces 13 are sometimes collectively referred to as the eyeglass frame. These components can be made of various materials, such as resin, wood, or metal, and may also be made of materials used in ordinary eyeglasses.

[0023] The prism lens 2 is formed to be a perfect circle like the rim 10 so as to fit into the rim 10. The prism lens 2 is a lens whose thickness changes uniformly from one end to the other end.

[0024] FIG. 2 shows a prism lens 2, and FIG. 2(a) is a front view of the prism lens 2. FIG. 2(b) is a cross-sectional view of the prism lens 2 taken along line A-A in FIG. 2(a) , passing through the center of the circle of the prism lens 2 and cutting in the direction in which the thickness changes. As described above and as shown in FIG. 2(b) , the thickness of the prism lens 2 changes uniformly from one end to the other. The example in FIG. 2(b) shows an example in which the thickness decreases from the top to the bottom of the page. FIG. 2(c) is a cross-sectional view of the prism lens 2 taken along a plane perpendicular to the cutting direction of the cutting plane in FIG. 2(b) , taken along line B-B in FIG. 2(a) . As shown in FIG. 2(c) , the thickness of the prism lens 2 does not change in this case.

[0025] As shown in FIG. 3( a), the 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 bonded to the annular portion 3. The annular portion 3 is a member that holds the prism lens 2 and has sufficient elasticity to allow it to fit onto the rim 10 by applying a certain amount of pressure, and is rigid enough to prevent the prism lens 2 from spontaneously falling off the rim 10 while fitted onto the rim 10. Hereinafter, the member consisting of the prism lens 2 and the annular portion 3 will be referred to as a detachable lens 4 a. The annular portion 3 may be made of a resin material such as rubber or reinforced plastic, for example, but is not limited to these.

[0026] FIG. 4 shows the state in which the prism lens 2 is held by the annular portion 3, with FIG. 4(a) being a front view, FIG. 4(b) being a back view, and FIG. 4(c) being a side view, showing an example of a cross-sectional view. As can be seen from FIG. 4(c), the thickness-wise edge portions 5 (5a, 5b) of the annular portion 3 are configured to protrude from the center of the prism lens 2 toward the outside, further than the center of the thickness. That is, as shown in FIG. 4(c), the outer edge portion of the annular portion 3 has a recess 6 formed therein, creating a depression in the center of the thickness direction. In addition, in FIG. 4(c), the left side of the drawing is the front side, and the right side is the back side. Note that in this document, the front side refers to the side from which a user looks when wearing the eyeglasses 1, and the back side refers to the opposite side. Therefore, the back side is the side from which a user sees when wearing the eyeglasses 1.

[0027] 5 shows a cross-sectional view of the rim 10 of the eyeglasses 1, with the removable lens 4a fitted into the rim 10. As shown in Fig. 5, the rim 10 fits into the recess 6 of the annular portion 3, thereby holding the removable lens 4a by the rim 10 of the eyeglasses 1. Furthermore, the rim 10 is held from the front and back by the edges 5 (5a, 5b) of the annular portion 3, preventing the removable lens 4a from falling off the rim 10 by itself. As shown in Fig. 5, the rim 10 is held between the edges 5a and 5b of the removable lens 4a.

[0028] 4(c), the edge 5a of the annular portion 3 may be longer than the edge 5b. By configuring the annular portion 3 in this manner, the removable lens 4a is less likely to fall off toward the user's eye while the eyeglasses 1 are being worn, thereby providing the user with eyeglasses 1 that are safe for use. Alternatively, the lengths of the edge portions 5a, 4b may be made uniform so that the removable lens 4a can be attached to or detached from the rim 10 from either the front or back side of the rim, thereby improving convenience when using the eyeglasses 1.

[0029] The direction in which the thickness of the prism lens 2 changes relative to the rim 10 of the removable lens 4a is at the discretion of the user. Therefore, the removable lens 4a can be freely attached and detached in a direction that provides the desired effect, providing the user with high flexibility in use of the eyeglasses 1. Furthermore, because the removable lens 4a can be removed from the rim 10, if the user does not want to use the prism lens 2, the user can simply remove the removable lens 4a from the eyeglasses 1.

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

[0031] Fig. 6 is a diagram showing a first example of the refraction of incident light in the eyeglasses 1, and is a diagram illustrating a base-left prism lens. Fig. 7 is a diagram showing a second example of the refraction of incident light in the eyeglasses 1, and is a diagram illustrating a base-right prism lens. Fig. 8 is a diagram showing a third example of the refraction of incident light in the eyeglasses 1, and is a diagram illustrating a base-down prism lens. And Fig. 9 is a diagram showing a fourth example of the refraction of incident light in the eyeglasses 1, and is a diagram illustrating a base-up prism lens.

[0032] The eyeglasses 1 are worn on the face of a user, facing the user's eyes, and have the function of redirecting light from the outside world and inputting it into the user's eyes using prism lenses 2 held by a frame (rims 10). The prism lenses 2 of the eyeglasses 1 are composed of a prism structure. In this description, a prism structure refers to a structure, such as a prism lens, that has the property of refracting light.

[0033] 6 to 9, for ease of explanation, it is assumed that the pair of prism lenses 2 attached to the pair of rims 10 are attached so that the refraction angles of the pair are the same. Here, as shown in Figures 6 to 9, the refraction angle of the lens is the refraction angle of light incident on the lens, and refers to the angle θ between the light incident on the lens and the light emitted from the lens. The refraction angle of the prism lens 2 is expected to be 0.5° to 20°, and is particularly preferably 0.5° to 2°.

[0034] The prism lens 2 has a flat surface facing the user, and an inclined surface facing forward, which is inclined relative to the flat surface. This allows the thickness of the prism lens to increase or decrease 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 eyeglass frame, or decrease monotonically from the top to the bottom of the eyeglass frame. The direction of the change in thickness can be determined arbitrarily depending on the direction in which the user wishes to shift their field of view of the outside world (the direction in which they wish to correct their posture).

[0035] Prism lenses 2 are classified into base-left prism 2A, base-right prism 2B, base-down prism 2C, and base-up prism 2D depending on the direction of refraction. Note that the prism lenses according to this embodiment rotate relative to the rim, so the direction of refraction is not limited to up, down, left, and right, but these four patterns will be described as representative examples because they make it easier to understand the effects of the prism lenses.

[0036] The base left prism 2A will be described with reference to Figure 6. As shown in Figure 6, when used by user P1, the pair of prism lenses 2 become thicker from the right side to the left side as viewed from user P1. Such a prism lens 2 is called a base left prism 2A. The thicker side 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 where it is shifted to the right of the actual space, which can promote the rotational movement of the eyeball to the right.

[0038] To elaborate on this point, the line of sight leads walking, so when a target object moves to the right, walking to the right is promoted and the eyeball rotates to the right.

[0039] The important functions are to obtain visual information about the direction of one's future destination, and to accurately control trunk rotation by using information on how much the eyes have moved (how much the eyes have rotated) to direct one's gaze in that direction. In other words, people unconsciously use various information obtained from their vision when walking. Furthermore, changes in these factors that cause changes in optic flow mean changes in gait. Changes in gait can be expected to reconstruct the internal and external loops.

[0040] Furthermore, when user P1 walks, weight is shifted to the right side. This causes the right half of the body to bend and tense, as if walking up a slope, while the left half of the body is stretched and relaxed, as if walking down a slope. This is called reciprocal alternating movement during walking. This is due to activation of the right and left cerebral cortices (Ponto Medullary Reticular Formation: PMRF).

[0041] As described above, with the eyeglasses 1, the pair of prism lenses 2 can refract the light incident on each of them in the same direction. This changes the visual information input to the brain of the user P1 through the eyes, and changes the user P1's spatial perception, thereby adjusting the effect of the visual information on the brain and body of the user P1. This point will be described in detail below.

[0042] Generally, humans determine their position using visual information, vestibular sensation, and somatic sensation. Therefore, various visual information influences the cerebral cortex, causing changes in the body's postural function. Furthermore, by changing visual information and changing spatial perception, it is possible to change biased postural sensation toward the normal postural sensation that should be present.

[0043] In other words, input information perceived as visual information displaces the external space input through vision, which is expected to unconsciously change the body posture as output information.

[0044] For example, in a case where a patient with strabismus complains of lower back pain while walking, an analysis of the patient's walking movements divided into stages of their walking cycle confirmed that compensatory movements are reduced when wearing prism lenses 2. In this case, compensatory movements refer to movements such as changes in posture that are made to compensate for the strabismus.

[0045] Until now, when dealing with functional abnormalities seen in walking movements, exercise instructors and therapists have focused primarily on correcting abnormalities in walking movements as muscle output, and have focused on improving muscle strength.

[0046] However, gait control involves not only muscle strength but also visual information, vestibular information, and somatic sensation. Furthermore, in addition to the body control system that enables ideal movements, it has been confirmed in recent years that visual information is also utilized to the maximum extent in the function that proactively addresses disruptions in the movement patterns of the body control system that are repeated repeatedly. For this reason, an approach that uses prism lenses 2 to change spatial cognitive function in patients with strabismus is expected to be extremely effective.

[0047] Furthermore, ensuring smooth eye movement suppresses tension in the suboccipital muscles. For this reason, it is important to be able to separate and independently move the eyeballs and the head. By using prism lenses 2, such as in the eyeglasses 1 of the present invention, and minimizing the load on the eyeballs, it is expected that proper eyeball alignment can be ensured. Here, eyeball alignment refers to the position of the eyeballs within the eye sockets.

[0048] Furthermore, tension during walking can be seen as a compensatory action by the body to obtain visual information in addition to grounding and ground awareness. In other words, separating eye movement from head (orbital) movement can reduce the sacrifice of other sensory organs and the muscle tension of extensor muscles in order to obtain vision.

[0049] 6, when the base left prism 2A is used in the eyeglasses 1 (when the removable lens 4a is fitted to the rim 10 to form the base left), the user is made to repeatedly learn the act of reaching for the target by utilizing the space that moves to the right along with the target. This allows the user P1 to change the space that he or she has become unable to perceive due to injury, illness, etc., using the prism lens 2, which can lead to improvements in various actions in daily life.

[0050] Specifically, patients with hemispatial neglect caused by brain damage lose the ability to recognize half of their visual field, significantly impairing their quality of life. This inability to recognize half of their visual field significantly impacts their ability to walk and move. Using Prism Lens 2 for hemispatial neglect caused by brain damage can help improve the client's quality of life (QOL).

[0051] Furthermore, the unconscious position of the tongue in the mouth is linked to eye alignment due to simultaneous firing by the brainstem. This allows the prism lens 2 to change the tongue position.

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

[0053] Next, the base light eyeglasses 1 will be described with reference to Fig. 7. In the following description, the same configurations and effects as those described above will not be described. Fig. 7 is a diagram showing the refraction of incident light in eyeglasses 1 that use prism lenses with a base on the right side of the eyeglasses.

[0054] 7, the pair of prism lenses 2 in the eyeglasses 1 increase in thickness from the left to the right as seen by the user P1 when the eyeglasses 1 are worn by the user P1. Such prism lenses 2 are called base light prisms 2B.

[0055] In the case of the base light prism 2B, the visual information of the user P1 is input in a state where it is shifted to the left of the actual space, which promotes the rotation of the eyeball to the left.

[0056] Furthermore, when walking, the body of user P1 is encouraged to shift weight to the left side. This causes the left half of the body to be in a flexed, tense state, as if walking up a slope, and the right half of the body to be in a stretched, relaxed state, as if walking down a slope. This is due to activation of the right cerebral cortex, which is opposite to the left side.

[0057] As explained above, when the base light prism 2B is used in the eyeglasses 1 (when the removable lens 4a is fitted to the rim 10 to act as the base light) as shown in Figure 7, the subject is made to repeatedly learn the act of reaching out to the target by utilizing the space that moves to the left along with the target. This allows the prism lens 2 to change the spatial bias that the subject has become unable to recognize, leading to improvements in various actions in daily life.

[0058] In humans, the right peripheral vision is naturally dominant over the left peripheral vision. This is related to the right center of gravity and the fact that the left cerebral cortex is more active than the right cerebral cortex.

[0059] In addition, in the case of the base light prism 2B, the tongue of the user P1 is shifted to the left side.

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

[0061] Fig. 8 is a diagram showing an example of base-down eyeglasses 1, with the lower side of the prism lens as the base. Note that in the following explanation, explanations of the same configurations and effects as those explained above will be omitted. Fig. 8 is a diagram showing the refraction of incident light in eyeglasses 1.

[0062] The pair of prism lenses 2 in the eyeglasses 1 shown in Fig. 8 have a thickness that increases from top to bottom. Such prism lenses 2 are called base-down prisms 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 moved higher than the actual space. This promotes upward eye movement. The head of the user P1 also moves backward. Furthermore, heel strike and flexion of the flexor muscles are promoted when walking.

[0064] As explained above, by using eyeglasses 1 fitted with prism lenses 2 in the manner shown in Figure 8, it is possible to suppress forward head position, in which the head is tilted forward and the neck is tilted, thereby suppressing forward head position of the head and neck and reducing the strain on the neck.

[0065] For example, if the neck is tilted so that the head is positioned 10 cm forward from the neutral position, the strain on the neck increases by approximately 10 kg. This makes it impossible to maintain neutrality (proper posture) in the neck, leading to neck pain, stiff shoulders, and obstructed blood flow in the carotid arteries, reducing blood flow to the brain.

[0066] This makes it difficult to maintain continuous blood circulation, making people more susceptible to drowsiness and fatigue. Forward head positioning also has a significant impact on respiratory function, so eliminating this is extremely important for maintaining eye and neck function. The base-down prism 2C can be used to maintain these functions.

[0067] In addition, the use of spatial cognitive therapy with the Base Down Prism 2C can be expected to be effective in preventing modern diseases. When the eyes are rotated downward, or when the eyes are facing downward, such as when the patient is in a forward head position or prone position, it causes an increase in intraocular pressure, which leads to the elongation of the eye axis.

[0068] The base-down prism 2C supports the upward movement of the eyeball and prevents the eye axis from being elongated, that is, creates an environment that is less likely to lead to myopia.

[0069] With the influence of digital devices such as smartphones, we now often see things up close, and our eyes tend to rotate downward. It has been reported that downward rotation of the eyeballs may hinder occlusal movements, particularly the proper development of the maxilla. Therefore, using base-down prism 2C is expected to promote upward rotation of the eyeballs and promote proper maxillary development.

[0070] In general, most postures when looking at digital devices involve downward eye movement. Downward eye movement refers to the downward rotation of the eyeball within the eye socket. When the eyeball is downward moved, a small amount of space is created at the back of the eye socket. If intraocular pressure increases with this space created (due to stimulation from digital devices), the eye axis may elongate, potentially causing the eyeball to become myopic.

[0071] Generally, when a human looks at an object closer than 6 meters, the crystalline lens accommodates the object, lengthening the anterior-posterior axis of the crystalline lens. The anterior-posterior axis of the crystalline lens refers to the thickness of the central part of the crystalline lens in the anterior-posterior direction, where it is thickest.

[0072] This obstructs the flow of aqueous humor and increases intraocular pressure. Furthermore, downward rotation of the eyeball is also a cause of forward head position, and if this posture continues, the strain on the internal carotid artery will obstruct blood flow to the eyeball, and the worst-case combination of reduced blood flow and increased intraocular pressure can lead to glaucoma, which, if progressed, can lead to blindness.

[0073] To address this problem, the base-down prism 2C is expected to be effective in moving the eyeballs upward and suppressing forward head position of the head and neck.

[0074] Additionally, increased intraocular pressure is a concern when working at a desk using a smartphone or computer. Prescribing base-down prism 2C raises the horizontal reference line in space. This reduces the increase in intraocular pressure caused by downward rotation of the eyeball and the eyeball itself pointing downward, and is expected to protect the eye's function from eye diseases such as glaucoma.

[0075] Furthermore, with the base-down prism 2C, the tongue of user P1 will be positioned upward. Tongue and eye movement are related, and in this case, by rolling the eyes upward, the tongue will unconsciously be more likely to touch the palate inside the mouth. This will result in the tongue being positioned properly in the mouth, leading to an approach to changing from mouth breathing to nasal breathing. This is expected to stabilize trunk and lower limb muscle strength, improve forward head posture, and eliminate sleep apnea syndrome caused by low tongue position.

[0076] In addition, the base-down prism 2C can be used to adjust the autonomic nervous system unconsciously.

[0077] Modern people often use their eyes in a downward movement of the eyeballs. The downward movement of the eyeballs is controlled by the trochlear nerve and the oculomotor nerve. Of these, the trochlear nerve, which is the more dominant of the four cranial nerves, is controlled by the sympathetic nervous system, so the sympathetic nervous system is always overactive when the eyeballs are downward moved.

[0078] In contrast, the base-down prism 2C supports upward eye movement. The upward eye movement is controlled by the oculomotor nerve of the third cranial nerve, which is controlled by the parasympathetic nervous system. Therefore, by moving the eyes upward, it is possible to expect the effect of increasing parasympathetic nervous activity.

[0079] In addition, the base-down prism 2C can be used to unconsciously support the proper positioning of the tongue. In other words, by moving the eyes upward, the tongue is displaced upward so that it touches the palate. When the tongue is in this position, people unconsciously promote nasal breathing, which leads to parasympathetic dominance.

[0080] In addition, the frontal lobe of the brain consumes more oxygen when breathing through the mouth than when breathing through the nose, and its activity is not at rest. Conversely, breathing through the nose can reduce the number of breaths, further increasing the effect of parasympathetic dominance.

[0081] In addition, using the base-down prism 2C to favor flexion of the flexor muscles is expected to have the effect of suppressing tension in the posterior mediastinum. Because the posterior mediastinum is a collection of sympathetic ganglia, suppressing tension in the posterior mediastinum is expected to have the effect of promoting inspiration during breathing.

[0082] The three effects mentioned above - upward eye movement, change in tongue position, and suppression of posterior mediastinum tension - can be expected to have a very significant effect on balancing the autonomic nervous system by shifting from a state where the sympathetic nervous system is always dominant, which is characteristic of modern people, to a state where the parasympathetic nervous system is dominant.

[0083] Next, the eyeglasses 1 will be described with reference to Fig. 9. Fig. 9 is a diagram showing how incident light is refracted in eyeglasses 1 that use prism lenses with the upper side of the eyeglasses as the base.

[0084] The pair of prism lenses 2 in the eyeglasses 1 shown in Fig. 9 are thicker from bottom to top. Such prism lenses 2 are called base-up prisms 2D.

[0085] In the case of the base-up prism 2D, the visual information of the user P1 is input in a state where it is moved lower than the actual space. This promotes downward eye movement. Also, the position of the head of the user P1's body moves forward. Furthermore, when walking, the heel contact is suppressed and the stretching of the extensor muscles is promoted.

[0086] In the case of the base-up prism 2D, the tongue of the user P1 will be positioned downward. There is a relationship between tongue and eye movement, which can lead to excessive tension in the lower limb muscles, potentially disrupting a stable state. One example of a situation where this effect can be expected is when a person who has difficulty stretching their extensor muscles uses the prism selectively during sports, etc.

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

[0088] 6 to 9, for ease of understanding, an example has been described in which the removable lens 4a is fitted onto the rim 10 so that the thickness of the prism lens 2 varies in the up, down, left, and right directions, but the direction in which the thickness of the prism lens 2 of the removable lens 4a varies may be diagonal. The direction in which the thickness of the prism lens 2 varies may be determined by fitting the removable lens 4a onto the rim 10 in a manner that achieves the effect desired by the user, taking into consideration the effect that the user will obtain from the eyeglasses 1.

[0089] In this way, eyeglasses 1 using prism lenses 2 can provide various benefits to the user. However, users do not always want to use removable lenses 4a, i.e., they do not always want to continue using eyeglasses 1 fitted with prism lenses 2. In some cases, some users may want to use lenses other than prism lenses 2 to give their eyes and brain a rest.

[0090] Therefore, as shown in FIG. 3( b ), in the eyeglasses 1 according to this embodiment, a removable lens 4b other than the removable lens 4a having the prism lens 2 may be fitted to the rim 10 of the eyeglasses 1 in place of the removable lens 4a. The removable lens 4b other than the removable lens 4a is a removable lens using a lens other than the prism lens 2. For example, the removable lens 4b may be a variety of lenses, such as a glass plate (which may be plastic) with a constant thickness, a colored glass (which may be plastic), a vision correction lens, or a blue light blocking lens, held by the annular portion 3. When a glass plate with a constant thickness is used instead of the prism lens 2, the eyeglasses 1 can be used as fashion glasses. When colored glass (or plastic) is used instead of the prism lens 2, the eyeglasses 1 can be used as colored glasses or sunglasses. When a vision correction lens is used instead of the prism lens 2, the eyeglasses 1 can be used as regular vision correction glasses. By configuring the eyeglasses 1 in this manner, the eyeglasses 1 can be used in a variety of ways depending on the user's preference, and a single pair of eyeglasses 1 can be provided. FIG. 3B shows an example in which sunglasses are used as the detachable lens 4b.

[0091] Furthermore, the detachable lens 4a may be configured to be rotatable relative to the rim 10, as shown in FIG. 10 . FIG. 10 is a diagram showing that the detachable lens 4a is rotatable relative 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. In other words, the detachable lens 4a may be configured to be rotatable relative to the rim 10 while fitted to the rim 10. The detachable lens 4 can be fitted to the rim 10 in any direction desired by the user so that the thickness of the prism lens 2 changes, but in this case, it is not necessarily possible to fit the detachable lens 4 to the rim 10 at the desired angle. In such a case, it is a hassle for the user to remove the detachable lens 4 from the rim 10 and then refit it. Therefore, as described above, the detachable lens 4 may be configured to be rotatable relative 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 4 can rotate relative to the rim 10. As long as the lens 4a can be rotated, the outer edge of the detachable lens 4a and the inner edge of the rim 10 do not have to be perfectly round, and some degree of error is permissible.

[0092] The outer edge of the removable lens 4a faces the inner edge of the rim 10, and the removable lens 4a is a perfect circle, and the inner edge of the rim 10 is also a perfect circle, with the inner diameter of the rim 10 and the radius of the removable lens 4a being approximately the same. Therefore, by manually sliding the outer periphery of the removable lens 4a, the user can rotate the removable lens 4a relative to the rim 10, as shown in Figure 3(b). Furthermore, by making the annular portion 3 out of a material that is difficult to slide, such as rubber, it is possible to make it possible for the lens to slide (rotate) manually but not easily rotate due to other external forces.

[0093] However, with this configuration, it cannot be ruled out that there is a possibility that an external force other than that of the user may act and accidentally rotate (shift) the detachable lens 4a relative to the rim 10. Unexpected rotation of the detachable lens 4a by the user is not preferable, as it may produce an effect different from the effect desired by the user.

[0094] Therefore, in the eyeglasses 1, it is preferable that the detachable lens 4a be provided with a fixing function that allows it to be manually rotatable relative to the rim 10, but can be fixed so that it does not rotate naturally.

[0095] Therefore, the eyeglasses 1 may be provided with a rotation suppression mechanism to prevent the removable lens 4a from easily rotating. Figures 11 and 12 are diagrams illustrating the rotation suppression mechanism. Figure 11(a) is a diagram showing an example of the configuration of the rim 10, with the left side showing a view from the user's side (back view) and the right side showing a cross-sectional view. Figure 11(b) is a diagram showing an example of the configuration of the removable lens 4a, with a perspective view of the edge 5b, with the left side showing a view from the user's side (back view) and the right side showing a cross-sectional view. Figures 12(a) and 12(b) are diagrams showing an example of the removable lens 4a fitted to the rim 10. Note that the connection portions of the rim 10 with the bridge 11 and temples 12 are omitted from Figures 11 and 12.

[0096] In the rotation suppression mechanism, as shown in Figure 11(a), the inner edge of the rim 10 has a structure with repeated concave and convex portions along its inner edge, and is provided with a plurality of recesses 8. Note that in Figure 11(a), for ease of viewing, the reference numeral 8 does not indicate all of the recesses, but only indicates some of the recesses. Furthermore, the number of recesses 8 is not limited to the number shown in Figure 11(a) and can be any number.

[0097] In contrast, as shown in FIG. 11( b), a convex portion 9 is provided on the outer edge of the detachable lens 4a, i.e., on part of the outer edge of the annular portion 3. As shown in FIG. 12( a), this convex portion 9 fits into one of the multiple concave portions 8 and faces it. When the convex portion 9 enters the concave portion 8, it is obstructed by the edge of the concave portion 8 and does not easily rotate. In this case, the convex portion 9 (annular portion 3) is made of a material with a certain degree of elasticity, as described above. The convex portion 9 may be made of, for example, resin, a wire that acts like a spring, or a leaf spring arranged along the bottom portion of the concave portion 8 of the annular portion 3. Therefore, when the detachable lens 4a is rotated by human force, the convex portion 9 bends toward the center of the prism lens 2 (or bends in the opposite direction to the rotation direction) when it approaches the edge of the concave portion 8, allowing the detachable lens 4a to rotate. 11(b) shows an example in which two protrusions 9 are provided, but the number of protrusions 9 is not limited to two. The number of protrusions 9 may be one, or may be three or more. When a plurality of protrusions 9 are provided, it is preferable that each protrusion 9 is arranged so as to fit into one of the recesses 8 of the rim 10.

[0098] Figure 12(b) shows an example of a state in which the detachable lens 4a has been rotated from the state shown in Figure 12(a) by the distance corresponding to three recesses 8. In this way, the detachable lens 4a can be rotated relative to the rim 10, and the rotation can also be restricted by the spacing of the recesses 8.

[0099] The uneven structure on the inner edge of the rim 10 may be provided along the entire inner edge in the width direction of the rim 10, or it may be provided only on a part of the inner edge in the width direction of the rim 10 (the surface side of the eyeglasses 1, or the inner side of the eyeglasses 1 (closer to the user, or inside the rim 10)). Figure 11(a) shows an example in which the uneven structure is provided closer to the user in the width direction of the inner edge of the rim 10, and Figure 11(b) shows an example in which a convex portion 9 is provided closer to the user in a removable lens 4a.

[0100] It goes without saying that the detachable lens 4b may have the same configuration as the detachable lens 4a. That is, the detachable lens 4b may also be manually rotatable relative 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 on its own.

[0102] 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 mentioned above, this is a design to make it easier to fit the detachable lens 4a onto the rim 10, but the edge 5b does not 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 have to protrude uniformly in the circumferential direction. That is, a portion of the edge 5b of the annular portion 3 may be configured to be shorter in length from the center of the prism lens 2 toward the outside than other portions 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 an example configuration of the detachable lens 4a, with the left side showing the view from the user's side (rear view). 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 of the detachable lens 4 a shown on the left side of FIG. 13( a) taken along line B-B. As shown in FIG. 13( a), making a portion of the edge 5 a of the detachable lens 4 a shorter than the other portions can improve the ease of fitting the lens 4 a onto the rim 10. While FIG. 13( a) shows an example in which two portions of the edge 5 a are shorter than the other portions, the number of portions where the edge 5 a is shortened is not limited to two. It may be one portion, or three or more portions. The more portions where the edge 5 a is shortened, the easier it is to attach and detach the detachable lens 4 a to and from the rim 10. On the other hand, the more portions where the edge 5 a is shortened, the more likely it is that the lens 4 a will come off the rim 10. The edge 5 b may be shorter (shorter) overall than the edge 5 a. 13A, the entire edge 5b may be made shorter (lower) than the edge 5a, and then a portion of the edge 5b may be made relatively shorter (lower), as shown in FIG. 13A. This configuration improves the ease of fitting the edge 5b to the rim 10 of the eyeglasses 1. The annular portion 3 does not need to be made of a uniform resin as a whole.Specifically, the resin composition may be changed so that the rigidity and elasticity of the edge portion 5a and the edge portion 5b of the annular portion 3 are different, and more specifically, the annular portion 3 may be configured so that the edge portion 5b is softer than the edge portion 5a (conversely, the edge portion 5a is harder than the edge portion 5b). By configuring the edge portions 5a and 5b of the annular portion 3 to have different rigidity and elasticity in this way, it is possible to make it easier to fit the removable lens 4 onto the rim 10 of the eyeglasses 1.

[0103] However, because the thickness of the prism lens 2 described above varies uniformly from one end to the other, the direction of refraction of the field of view is limited to one direction. However, some users of the eyeglasses 1 may wish to enjoy multiple benefits simultaneously, rather than being limited to one direction. One possible way to achieve this configuration is to stack multiple prism lenses. However, this would increase the weight of the eyeglasses 1 and complicate the structure of the rim that holds the prism lenses, or the structure of the annular portion, making stacking multiple prism lenses undesirable. Furthermore, stacking multiple prism lenses would increase the thickness of the lens portion, resulting in an unattractive appearance.

[0104] Therefore, a region dividing member 160 may be provided on the prism lens 2 of the eyeglasses 1, as shown in FIGS. 14( a) and 14(b). FIG. 14(a) is a perspective view of the eyeglasses 1 with the region dividing member 160 provided on the prism lens 2, and FIG. 14(b) is a front view of the eyeglasses 1 with the region dividing member 160 provided on the prism lens 2. The region dividing member 160 is a long, thin member as shown in the figure. The length of the region dividing member 160 is long enough to allow the user of the eyeglasses 1 to recognize that the prism lens 2 has been divided into two regions, and its width is sufficient so that the user can recognize its presence. As shown in FIG. 14, the region dividing member 160 does not have to reach from one end of the rim 10 to the other, or it may be provided so as to connect the ends of the rim 10. The width of the region dividing member 160 may be, for example, 0.5 mm to 1 mm, or may be approximately 2 mm.

[0105] The area dividing member 160 is a member that can divide the field of view that a user can see through the prism lens 2 into at least two areas. In the example of FIG. 14( b), the area dividing member 160 divides the prism lens 2 into two upper and lower areas 161 and 162. The area dividing member 160 is provided on the prism lens 2 so that one of the areas 161 and 162 is larger than the other. For example, as shown in FIG. 14( b), the area dividing member 160 divides the prism lens 2 into areas 161 and 162, which are larger and smaller in area (in the case of FIG. 14( b), area 161 and area 162). The human eye has a tendency to avoid foreign objects in the field of view when viewing objects. At the same time, the human eye also tries to secure as wide a field of view as possible. As a result, the user tends to secure the field of view through the larger of the two areas formed by the area dividing member 160. Specifically, the viewer should look at things by making sure that their line of sight passes through the center of the larger area.

[0106] Specifically, the cases with and without the region dividing member 160 will be described using Fig. 15. Fig. 15(a) is a side view schematically showing the line of sight when a user is wearing regular eyeglasses 1. As shown in Fig. 15(a), users who wear eyeglasses with frames (even when there are no frames, the outer edges of the lenses correspond to the frames) typically look at objects by looking at the center of the lenses. That is, as shown in Fig. 15(a), the user looks at objects (obtains visual information) by aligning their line of sight G1 through the center C1 of the eyeglasses 1.

[0107] On the other hand, FIG. 15(b) is a side view schematically illustrating the relationship between the user's line of sight G2 and the eyeglasses 1 when the user wears the eyeglasses 1 equipped with the area dividing member 160. The eyeglasses 1 shown in FIG. 15(b) are provided with an area dividing member 160 extending in the left-right direction relative to the prism lens 2 so as to divide the prism lens 2 into two upper and lower areas, as shown in this drawing and FIG. 14(b). As shown in FIG. 15(b), when the area dividing member 160 is present, the user tries to view objects while keeping the area dividing member 160 out of their field of view as much as possible, in order to avoid foreign objects from entering their field of view. As a result, the user unconsciously (or consciously) looks at the center of area 161, which is larger than area 162 shown in FIG. 14(b), in order to obtain more visual information, i.e., a wider range of information. Therefore, the user looks at objects so that their line of sight G2 passes through at least the vertical center C2 of area 161, as shown in FIG. 15(b).

[0108] 15(b) also shows the user's line of sight G1 in the case where the area dividing member 160 is not present. A comparison of line of sight G1 and line of sight G2 makes it clear that when the area dividing member 160 is present, the user's line of sight is directed upward because the user obtains visual information through the area 161. In other words, when the area dividing member 160 is present in the eyeglasses 1, the user's eyeballs can be encouraged to roll upward, compared to when the area dividing member 160 is not present in the eyeglasses 1. As a result, the amount of visual information obtained by line of sight G2 is less on the lower side of the line of sight than when the area dividing member 160 is not present. As a result, the user naturally tucks their chin in to obtain more information on the lower side of the line of sight.

[0109] In FIG. 15( b ), an example is described in which the prism lens 2 is divided vertically, i.e., an area divider 160 extending horizontally relative to the prism lens 2 is used to make the user's line of sight easier to understand. However, the location (extension direction) of the area divider 160 is not limited to the examples in FIGS. 14 and 15( b ). The prism lens 2 may be divided horizontally or diagonally by the area divider 160, in addition to being divided vertically. In the example of FIG. 14( b ), the area divider 160 may be arranged so that the upper side (area 161) has a smaller area than the lower side (area 162). Even when the prism lens 2 is divided horizontally, i.e., when a vertically elongated area divider 160 is provided on the prism lens 2, the right or left side of the divided areas may have a larger area. That is, the vertically long area dividing member 160 may be provided on the left side or on the right side of the prism lens 2 .

[0110] It has been explained that when the area dividing member 160 is arranged as shown in FIG. 14( b), the user's eyes are rotated upward. On the other hand, when the area dividing member 160 extending laterally as shown in FIG. 14( b) is arranged toward the top of the prism lens 2, the user's eyes are naturally rotated downward. Furthermore, when the vertically elongated area dividing member 160 is arranged toward the right (toward the left as seen by the user) while the eyeglasses 1 are viewed from the front, the user's eyes are rotated to the right. Conversely, when the vertically elongated area dividing member 160 is arranged toward the left (toward the right as seen by the user), the user's eyes are rotated to the left. In other words, the area dividing member 160 can be expected to have the effect of naturally rotating the user's eyes in any direction. Therefore, the area dividing member 160 can be described as having the same effect as the prism lens 2.

[0111] 14(b), when the area dividing member 160 is disposed below the prism lens 2, it encourages the user to roll their eyes upward, and thus the same effect as a base-down prism can be expected. Also, when the area dividing member 160 is disposed above the prism lens 2, it encourages the user to roll their eyes downward, and thus the same effect as a base-up prism can be expected.

[0112] Furthermore, when the area dividing member 160 is positioned to the right of the prism lens 2 in a front view (the area dividing member 160 is positioned to the left when viewed from the user), the user's eyes are guided to the right, which encourages the body to rotate to the right, and the same effect as a base left prism can be expected. When the area dividing member 160 is positioned to the left of the prism lens 2 (the area dividing member 160 is positioned to the right when viewed from the user), the user's eyes are guided to the left, which encourages the body to rotate to the left, and the same effect as a base right prism can be expected.

[0113] The position of the area dividing member 160 can be changed depending on which direction the user's eyeballs should be made to rotate and how the user's posture should be normalized. The strength of the correction varies depending on the position of the area dividing member 160; the closer to the center of the lens, the greater the amount of movement of the user's line of sight (eyeballs), and as a result, the strength of the posture correction by the area dividing member 160 can be strengthened.

[0114] Furthermore, depending on the position of the area dividing member 160 relative to the prism lens 2, it is possible to enhance the effect of the prism lens 2 or, conversely, suppress an excessively effective effect of the prism lens 2. Explaining this using Figure 14(b) as an example, if the area dividing member 160 is provided at the position shown in Figure 14(b) and the prism lens 2 is in a base-down prism state, the area dividing member 160 can enhance the effect that the prism lens 2 as a base-down prism has on the user. Also, if the area dividing member 160 is provided at the position shown in Figure 14(b) and the prism lens 2 is in a base-up prism state, the area 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 area dividing member 160 so that the direction of change in thickness of the prism lens 2 is at a different angle, it is possible to provide the user with a change in a second direction, whereas the prism lens 2 can only provide the user with a change in one direction, by using the area dividing member 160. Furthermore, the area dividing member 160 may be provided at any angle relative to the prism lens 2, and may be provided so as to be oblique to the rim 10 when viewed from the front, as long as the effect desired by the user is obtained.

[0116] Here, the area dividing member 160 is assumed to be a sticker that can be attached to the prism lens 2, but the area dividing member is not limited to a sticker. As other examples, the area dividing member may be realized from a resin material that can be attached to the prism lens 2, or may be realized from the same material as the rim 10 as a part that can be attached to and detached from the rim 10. Alternatively, the area dividing member 160 may be realized from rubber or string that is wrapped around the rim 10.

[0117] (Summary) As described above, the eyeglasses 1 according to the present invention use the removable lens 4a provided with the prism lens 2, which can be freely attached in a manner that allows the user to change the field of view in the direction desired, thereby providing eyeglasses 1 using the highly convenient prism lens 2. Furthermore, the removable lens 4a can be freely rotated by the user (manually) relative to the rim 10 of the eyeglasses 1. Therefore, if the user does not like the tilt direction of the prism lens 2, the user can easily adjust it by rotating the removable lens 4a. The eyeglasses 1 can also be used as eyeglasses 1 that do not use the prism lens 2 instead of the removable lens 4a. Furthermore, by attaching the area dividing member 160 to the prism lens 2, it is possible to easily perform correction in the form desired by the user in combination with the prism lens 2.

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

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

[0120] Furthermore, this secretion of adrenaline can increase the pulse rate and breathing rate of the user P1, which is expected to have the effect of raising the perceived body temperature and increasing blood flow. For this reason, it is recommended for those who feel cold, want to feel more energetic and confident, or want to increase their energy.

[0121] Furthermore, for example, if the prism lenses are yellow and transparent, they can stimulate the left brain of the user P1 and improve mental agility, which leads to positive thinking and improves communication skills, and is recommended when speaking in public, for example.

[0122] Furthermore, it is expected to have the effect of stimulating the digestive system, such as increasing appetite, because it acts on the endocrine system and promotes the secretion of growth hormone.

[0123] For example, if the prism lenses are made green transparent, they will be an intermediate color between warm and cool colors, and will provide a sense of calm and security due to the less stimulating effect. Green has also long been considered to have a resting effect on the eyes, and gazing forward through green transparent prism lenses is expected to reduce fatigue.

[0124] For example, if the prism lenses are made blue and transparent, it is expected that the parasympathetic nervous system will be dominant and the excitement of the nerves will be calmed. This is expected to lower blood pressure, pulse rate, and body temperature, and relax the mind and body. It is recommended for those who suffer from insomnia, or who want to improve their ability to make calm judgments and observations and face things carefully.

[0125] For example, pink transparent prism lenses are expected to promote the secretion of female hormones, and are therefore recommended for those who want to feel more feminine, are in love, or are suffering from gynecological problems.

[0126] For example, if the prism lenses are made purple and transparent, they are a mixture of two very different colors, red and blue, and have the power to improve healing and intuition, so are recommended when you are in a state of mental conflict.

[0127] In this way, by making the lenses colored and transparent, it is possible to provide effects other than guiding the line of sight and correcting posture.

[0128] (2) In the above embodiment, the removable lens 4a is fitted to the rim 10 and rotated relative to the rim 10, but the implementation of the configuration in which the removable lens 4a rotates relative to the rim 10 is not limited to this. For example, in the above embodiment, the state in which the annular portion 3 is fitted to the rim 10 is taken as the frame of the eyeglasses 1. Then, a separate annular portion that holds the prism lens 2, or the prism lens 2 itself, may be fitted directly to the annular portion 3 attached to the eyeglasses 1. In this case, the annular portion 3 that is originally attached to the rim 10 of the eyeglasses 1 rotates.

[0129] (3) The eyeglasses are not limited to the above-mentioned modifications, and may be selected and combined as appropriate. Other modifications may also be made to the eyeglasses that can guide the user's line of sight, enforce posture, or assist exercise.

[0130] REFERENCE SIGNS LIST 1 eyeglasses 2 prism lens 3 annular portion 4a, 4b detachable lens 5a, 5b edge portion 6 recess 8 recess 9 protrusion 10 rim 11 bridge 12 temple 13 tip 14 nose pad 160 area dividing member

Claims

1. A pair of glasses comprising: a frame having a rim capable of holding a lens; and a prism lens configured to be detachable from the rim and having a thickness that uniformly changes from one end to the other end.

2. The pair of glasses according to claim 1, wherein the prism lens and the rim are circular, and the prism lens is configured to be rotatable with respect to the rim.

3. The pair of glasses according to claim 2, wherein the prism lens comprises the prism lens and a frame surrounding the prism lens in the circumferential direction, and the frame is attached to the rim by fitting the frame to the rim.

4. The pair of glasses according to claim 3, wherein the frame includes 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 pair of glasses is configured to have a shorter length than the edge portion farther from the user.

5. The pair of glasses according to claim 4, wherein the frame includes an edge portion that sandwiches the rim in the width direction, and a part of the edge portion is configured to be shorter than another part in the circumferential direction.

6. The pair of glasses according to claim 3, wherein the frame is provided with a convex portion protruding in the direction of the rim, the inner edge portion of the rim is provided with a plurality of concave portions, and the convex portion faces the concave portions.

7. The pair of glasses according to claim 3, wherein the rim is configured to be detachable and attachable with another lens instead of the prism lens.

8. The pair of glasses according to claim 7, wherein the other lens is a lens for vision correction.

9. The pair of glasses according to any one of claims 1 to 8, wherein a region dividing member is provided for dividing the prism lens into at least two regions with respect to the prism lens.

Images