Invisible bifocal lens

Abstract

The utility model provides an invisible bifocal lens, which is characterized in that the inner surface of the lens is an integrated lens consisting of a low-beam area and a high-beam area, the high-beam area is a spherical surface or an ellipsoid, the arc radius of the low-beam area is larger than that of the high-beam area, and the difference between the degree of the low-beam area and the degree of the high-beam area is 75-350 degrees. The optical center of the low-beam area is on or slightly lower than the central axis of the lens, and the optical center of the high-beam area is on or upper than the central axis of the lens. The automatic switching device is suitable for automatic switching between long-distance watching and short-distance watching.

Description

TECHNICAL FIELD

[0001] The utility model belongs to glasses and vision correction technical field, concretely relates to myopia correction lens, presbyopia lens and glasses. BACKGROUND

[0002] There are many kinds of bifocal lens products on the market at present, there is a line bifocal lens in the middle of the lens with a clear convex step, there is a round top bifocal lens, flat top bifocal lens on the outer surface of the lens, these bifocal lenses look far from below, there is a clear demarcation line, and it is not beautiful enough to look, and it feels a little strange compared with ordinary glasses, and it is not willing to wear in formal occasions, so it affects the self-confidence of the wearer, and it needs to wear special glasses for replacement, in addition, the near light area is small. There is also a no-form bifocal lens with a positive 100 to positive 300 degree convex lens on the inner surface of the lens, only in the center of the far light area there is an optical center, and the small circular convex lens below has a large prism degree but no optical center, and it is not clear enough to look near. Therefore, the bifocal lens surface has two focal points (optical centers), which seems simple but is not easy to think and achieve. Although the progressive multifocal lens solves the appearance problem, the effective far and near areas are very small, and there are left and right blind areas, and the field of view is not very open. SUMMARY

[0003] The utility model aims at overcoming the deficiency in the above-mentioned technology, and provides a kind of invisible bifocal lens, with the characteristics of bifocal lens, and the interface line of lens outer surface is not obvious, basically does not affect the appearance, is used to the glasses with two degrees, and far and near can be switched freely, a pair of glasses can look far and near, and it is very convenient to use.

[0004] The technical solution of the utility model is realized as follows:

[0005] A kind of invisible bifocal lens, characterized by: the inner surface or outer surface of the lens is formed by the lens of near light area and far light area, the far light area is spherical or ellipsoidal, the near light area is spherical or ellipsoidal or aspherical, the bending radius of the far light area is less than the bending radius of the near light area, the intersection of the near light area and the far light area of the lens is an interface line, the interface line can be transitioned into transition arc (6) by arc transition smooth transition, the degree of the far light area is basically constant, the degree of the near light area is different from the degree of the far light area by 75 degrees to 350 degrees, or the degree of the upper far light area is reduced by 75 degrees to 350 degrees compared with the degree of the near light area, the optical center O2 of the near light area is on the central axis of the lens or lower position, the optical center O3 of the far light area is on the central axis of the lens or upper position, and at least one optical center (or called optical center) in the near light area and the far light area.

[0006] Further, the outer surface of the lens is spherical, the inner surface of the lens is composed of near vision zone and distance vision zone, the intersection line coincides with the center O point of the lens, the optical center O3 of the distance vision zone is located 2-20mm above the center axis O point of the lens, preferably 2-10mm, the optical center O2 of the near vision zone is located 2-20mm below the center axis O point of the lens, preferably 2-10mm.

[0007] Further, the outer surface of the lens is spherical, the inner surface of the lens is composed of near vision zone and distance vision zone, the intersection line coincides with the center O point of the lens, the optical center O3 of the distance vision zone is located 2-20mm above the center axis O point of the lens, preferably 2-10mm, the optical center O2 of the near vision zone is located 2-20mm below the center axis O point of the lens, preferably 2-10mm.

[0008] Further, the outer surface of the lens is spherical, the inner surface of the lens is composed of near vision zone and distance vision zone, the intersection line coincides with the center O point of the lens, the optical center O3 of the distance vision zone is located 2-20mm above the center axis O point of the lens, preferably 2-10mm, the optical center O2 of the near vision zone is located 2-20mm below the center axis O point of the lens, preferably 2-10mm.

[0009] Further, the outer surface of the lens is spherical, the inner surface of the lens is composed of near vision zone and distance vision zone, the intersection line coincides with the center O point of the lens, the optical center O3 of the distance vision zone is located 2-20mm above the center axis O point of the lens, preferably 2-10mm, the optical center O2 of the near vision zone is located 2-20mm below the center axis O point of the lens, preferably 2-10mm.

[0010] Further, the outer surface of the lens is spherical, the inner surface of the lens is composed of near vision zone and distance vision zone, the intersection line coincides with the center O point of the lens, the optical center O3 of the distance vision zone is located 2-20mm above the center axis O point of the lens, preferably 2-10mm, the optical center O2 of the near vision zone is located 2-20mm below the center axis O point of the lens, preferably 2-10mm.

[0011] Further, the outer surface of the lens is spherical, the inner surface of the lens is composed of near vision zone and distance vision zone, the intersection line coincides with the center O point of the lens, the optical center O3 of the distance vision zone is located 2-20mm above the center axis O point of the lens, preferably 2-10mm, the optical center O2 of the near vision zone is located 2-20mm below the center axis O point of the lens, preferably 2-10mm.

[0012] Further, the outer surface of the lens is spherical, the inner surface of the lens is composed of near vision zone and distance vision zone, the intersection line coincides with the center O point of the lens, the optical center O3 of the distance vision zone is located 2-20mm above the center axis O point of the lens, preferably 2-10mm, the optical center O2 of the near vision zone is located 2-20mm below the center axis O point of the lens, preferably 2-10mm.

[0013] Further, the outer surface of the lens is spherical, the inner surface of the lens is composed of near vision zone and distance vision zone, the intersection line coincides with the center O point of the lens, the optical center O3 of the distance vision zone is located 2-20mm above the center axis O point of the lens, preferably 2-10mm, the optical center O2 of the near vision zone is located 2-20mm below the center axis O point of the lens, preferably 2-10mm.

[0014] Further, the outer surface of the lens is spherical, the inner surface of the lens is composed of near vision zone and distance vision zone, the intersection line coincides with the center O point of the lens, the optical center O3 of the distance vision zone is located 2-20mm above the center axis O point of the lens, preferably 2-10mm, the optical center O2 of the near vision zone is located 2-20mm below the center axis O point of the lens, preferably 2-10mm.

[0015] Further, the outer surface of the lens is spherical, the inner surface of the lens is composed of near vision zone and distance vision zone, the intersection line coincides with the center O point of the lens, the optical center O3 of the distance vision zone is located 2-20mm above the center axis O point of the lens, preferably 2-10mm, the optical center O2 of the near vision zone is located 2-20mm below the center axis O point of the lens, preferably 2-10mm.

[0016] Beneficial effects

[0017] Compared with the prior art, the hidden double light lens has the advantages that: 1. It is beneficial to vision correction and control. The degree of the lens periphery is smaller than that of the center area, which can reduce the eyeball adjustment and delay the development of myopia. The periphery of the far light area is the near light area, when looking near, it can naturally look down to the near light area, and the degree of the near light area is 100-350 degrees lower than that of the far light area, which can reduce the eyeball adjustment and delay the development of myopia. 2. The vision is clearer. The near light area of the utility model is basically constant, and the image formed at the retinal periphery position is clearer and more complete. The far light area and the near light area of the lens both have optical centers, and clear viewing effect can be obtained when looking near and looking far. 3. The interface line on the outer surface of the lens is not obvious inside, and there is a circular arc transition area, which basically does not affect the appearance. 4. Convenient to use. The utility model has a far light area and a near light area, and can easily switch between far vision and near vision. 5. The field of view is wider. The area of the near light area and the far light area can be made very large, and the field of view is larger, and the field of view can be kept larger when looking far and looking near. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the front view structure schematic diagram of the hidden double light lens of the utility model, and the optical centers of the near light area and the far light area coincide with the cylindrical axis of the lens;

[0019] Figure 2 is the front view structure schematic diagram of the hidden double light lens with two optical centers of the utility model;

[0020] Figure 3 is the front view structure schematic diagram of the hidden double light lens of the utility model, and the interface line coincides with the cylindrical axis of the lens;

[0021] Figure 4 is the inside three-dimensional structure schematic diagram of the hidden double light lens with transition arc of the utility model;

[0022] Figure 5 is the front view structure schematic diagram of the hidden double light lens with large field of view of the utility model.

[0023] In the figure, 1 is a lens, 2 is a near light area, 3 is a far light area, 4 is an interface line, 5 is a cylindrical surface, and 6 is a transition arc. DETAILED DESCRIPTION

[0024] The utility model will be further described in combination with the drawings.

[0025] For example, Figure 1As shown, the utility model discloses a center area is high -beam area's invisible doublet lens 1, lens 1 periphery outer contour is cylindrical, the outer surface of lens 1 is the outer sphere, the inner surface of circular lens 1 is the lens 1 that near -light area 2 and high -beam area 3 are composed of integrity, near -light area 2 is the sphere or ellipsoid that is inwardly concave, and the bending arc radius is R2, and high -beam area 3 is the sphere or ellipsoid that is inwardly concave, and the bending arc radius of sphere is R3. The bending arc radius R3 of high -beam area 3 is less than the bending arc radius R2 of near -light area 2, that is R3 < R2.

[0026] The intersection of the axis of the outer cylinder of lens 1 and the outer sphere is point O, or the lens center O. The optical center O2 of near -light area 2 is on the center axis of lens 1. A concave lens is removed in the center area of the near -light area 2 of single -light lens, so that the myopia degree of the center high -beam area 3 increases by 75-350 degrees, which is suitable for looking far. The high -beam area 3 is in the positive center position of the lens. The optical center O3 of the high -beam area 3 is on the center axis of lens 1. Looking far through the optical center O3 can obtain clear viewing effect. When the diameter of the high -beam area 3 is too small, the field of view is very small when looking far, and it is not convenient to frequently turn the head to watch. To avoid this problem, the effective diameter of the high -beam area 3 is 16mm to 35mm, and the diameter is preferably 20mm-25mm. In this way, the field of view is wide and frequent head turning is not required. The intersection line 4 of the circular arc surface of the near -light area 2 and the circular arc surface of the high -beam area 3 is a circular arc line. A spherical ring-shaped transition circular arc 6 is arranged at the intersection line 4, which is not visible from the outside, becoming an invisible doublet lens. The myopia degree of the center high -beam area 3 is greater than that of the near -light area 2 by 75-350 degrees, which is suitable for looking far. The present utility model mainly uses myopia degree for myopia prevention and control. The myopia degree of the periphery of the near -light area 2 is smaller than that of the center high -beam area 3.

[0027] The 75-350 degrees, i.e. 0.75D-3.50D, can be 0.75D, 1.00D, 1.25D, 1.50D, 1.75D, 2.00D, 2.25D, 2.50D, 2.75D, 3.00D, 3.25D, 3.50D, etc. Due to machining errors, the actual values are not limited to the listed values, and other values within the range are also applicable.

[0028] The spherical centers of the near -light area and the high -beam area coincide with the lens center axis. The center high -beam area is located in the positive center of the lens. The thickness of the lens periphery is basically equal.

[0029] In the lens fitting effective area of the lens, the degrees of the near -light area and the high -beam area are basically constant. In the area with a larger diameter, which is beyond the viewing position, the non -spherical surface technology with variable circular arc radius can be used to thin the periphery, so that the degrees gradually decrease in the peripheral area, so as to reduce the weight of the lens.

[0030] The inner surface or the outer surface of the lens 1 can be added with astigmatism according to the needs of the user, and the astigmatism is generally between 50 degrees and 300 degrees, and higher astigmatism is less common. When the inner surface is added with astigmatism, the intersection line 4 is an elliptical line.

[0031] Figure 1 The high beam area 3 is in the center of the lens, and the optical center O2 of the peripheral low beam area 2 is covered by the high beam area, and only the optical center O3 of the high beam area. After special design, the optical center O2 of the peripheral low beam area 2 can be moved out of the center, and the double optical center hidden double light lens with the high beam area in the center area.

[0032] As shown in Figure 2 The utility model discloses a kind of hidden double light lenses with double optical center 1, the outer surface of lens 1 is outward protruding outer sphere, and the bending radius of outer sphere is R1. The inner surface of circular lens 1 is by low beam area 2 and high beam area 3 integrated lens, low beam area 2 is inward recessed spherical surface, and bending radius is R2, and high beam area 3 is inward recessed spherical surface, and the bending radius of spherical surface is R3, and the intersection line 4 of the circular arc surface of low beam area 2 and the circular arc surface of high beam area 3 is circular arc line, for wide field of view, the diameter of circular arc intersection line 4 outside high beam area 3 is 18mm to 50mm, even up to 100mm, as shown in Figure 5 Upper high beam area 3 is within circular arc intersection line 4, and the area outside high beam area 3 is low beam area 2.

[0033] The inner surface or the outer surface of lens 1 can be added with cylindrical astigmatism according to the needs of the user. When the inner surface is added with astigmatism, the intersection line 4 is an elliptical line. Low beam area 2 and high beam area 3 are inward recessed ellipsoidal surface.

[0034] Because lens is in different posture, position can be different or even opposite, for the convenience and consistency of description and understanding, "upper, lower, left, right and center" are according to the position of lens when it is placed in vertical state, but should not be understood as the structure limitation of the utility model.

[0035] The outer contour of lens 1 is cylindrical 5, the outer surface of lens 1 is outer sphere, and the intersection of the axis of lens cylindrical 5 and the outer sphere is O point, or called lens center O. Generally, the lens center O of single light lens is optical center O, and the pupil can obtain the clearest viewing effect when passing through the optical center. Figure 1 The optical center O2 of low beam area 2 is covered by high beam area 3, and only the optical center of high beam area. After special design, low beam area 2 and high beam area 3 can have optical center, the optical center O2 of low beam area 2 is in low beam area 2, and the optical center O3 of high beam area 3 is in high beam area 3, and is distributed on both sides of intersection line 4.

[0036] The lens 1 is vertically placed for viewing, the optical center O2 of the near vision zone 2 is located at the lower part of the near vision zone 2 near the intersection line 4, and in the figure, the optical center O2 is located at the lower part of the center O of the lens 1, and the optical center O3 of the distance vision zone 3 is located at the lower part of the distance vision zone 3. In this way, a larger area can be selected during lens fitting.

[0037] The arc radius R3 of the distance vision zone 3 is smaller than the arc radius R2 of the near vision zone 2, that is, R3 < R2, and the distance vision zone 3 has a refractive power that is 75-350 degrees larger than the refractive power of the near vision zone 2. The distance vision zone 3 has a refractive power that is a constant power between 75 degrees and 350 degrees larger than the refractive power of the near vision zone 2, and the distance vision zone is suitable for distance vision, and the near vision zone is suitable for near vision. The distance vision zone and the near vision zone of the lens are both single-focus lenses, and the optical centers in the zones are clear.

[0038] As shown in Figure 3 The utility model discloses a kind of contact lenses 1, the inner surface of circular lens 1 is made of near vision zone 2 and distance vision zone 3 integrated lens, the near vision zone 2 is inwardly concave spherical surface, arc radius is R2, the distance vision zone 3 is inwardly concave spherical surface, the arc radius of spherical surface is R3, the intersection line 4 of the arc surface of near vision zone 2 and the arc surface of distance vision zone 3 is a circular arc line, intersection line 4 coincides with the center O of lens 1, the diameter of circular arc intersection line 4 is 16mm to 35mm, even up to 100mm. The distance vision zone 3 in middle part is within intersection line 4, the area outside intersection line 4 is near vision zone 2. The outer surface of lens 1 is outwardly convex outer spherical surface, the arc radius of outer spherical surface is R1. Lens 1 inner surface or outer surface can be added cylindrical astigmatism power according to the needs of user.

[0039] The outer contour of lens 1 periphery is cylindrical surface 5, the outer surface of lens 1 is outer spherical surface, and the intersection of the axis of the cylinder and the outer spherical surface is point O, or the center O of lens. The optical center O2 of near vision zone 2 is located at the lower part of the center O of lens 1-2~-10mm, even to-15 or-20mm, and the optical center O3 of distance vision zone 3 is located at the lower part of the distance vision zone, and the optical center O3 is located at the upper part of the center O of lens 2~+10MM, even to +15 or +20mm. The distance vision zone and the near vision zone of the lens both have optical centers, and the distance and near vision through the optical centers are clear.

[0040] As shown in Figure 4 And Figure 5As shown in the figure, the present utility model discloses another kind of invisible bifocal lens 1 with double optical centers. The inner surface of the circular lens 1 is a lens formed by integrating a near-vision area 2 and a far-vision area 3. The near-vision area 2 is a spherical surface that is concave inward, with a bending arc radius of R2. The optical center of the near-vision area 2 coincides with the center O of the lens. An upper part of the near-vision area 2 is dug inward to form a concave lens as the far-vision area 3. The bending arc radius of the spherical surface of the far-vision area 3 is R3, and the bending arc radius R3 of the far-vision area 3 is smaller than the bending arc radius R2 of the near-vision area 2, that is, R3 < R2. The diopter value of the far-vision area 3 is 75 to 350 degrees larger than that of the near-vision area 2. The diopter of the far-vision area 3 is a certain basically constant diopter increased by 75 degrees to 350 degrees based on the diopter value of the near-vision area 2. The intersection of the arc surface of the near-vision area 2 and the arc surface of the far-vision area 3 is an intersection line 4, and the intersection line 4 is above the center O point of the lens. A transition arc 6 can be set at the intersection line to make the intersection line less obvious. The diameter of the far-vision area 3 within the transition arc 6 is between 18 mm and 100 mm, preferably between 20 - 60 mm. The upper far-vision area 3 is within the transition arc 6, and the area outside the transition arc 6 is the near-vision area 2.

[0041] The outer surface of the lens 1 is an outer spherical surface that protrudes outward, and the bending arc radius of the outer spherical surface is R1. Cylindrical lens astigmatism diopter can be added to the inner surface or the outer surface of the lens 1 according to the needs of users, and the spherical surfaces of the aforementioned near-vision area and far-vision area are ellipsoidal surfaces.

[0042] For the convenience of manufacturing, the axis of the optical center O2 of the near-vision area 2 coincides with the center O of the lens, that is, the position of the optical center O2 of the near-vision area 2 is on the axis of the center of the lens. The optical center O3 of the far-vision area 3 is at a lower position within the far-vision area and at a position above the center O point of the lens 1. The optical center of the near-vision area 2 coincides with the center O of the lens, and it will be clearer to see near objects. Through special design of the present utility model, the position of the optical center O3 of the far-vision area can be at a position within the far-vision area close to the intersection line 4 or the transition arc 6 below, so that the optical center O3 of the far-vision area and the optical center O2 of the near-vision area are distributed on the upper and lower sides of the intersection line 4 or the transition arc 6, enabling the eyes to obtain the best viewing effect when viewing in the near-vision area and the far-vision area.

[0043] As Figure 5 shown, the diameter of the intersection line 4 of the far-vision area 3 of this kind of double-optical-center lens can be made very large, and it can still have double optical centers while maintaining respective optical centers at suitable viewing positions on both sides of the intersection line, allowing the far-vision area to obtain a larger field of view. The diameter of the far-vision area 3 can even exceed 100 mm. When the diameter exceeds 35 mm, the intersection line 4 within the effective area of the lens is no longer a circular or elliptical line but an upward-opening arc curve. The obvious feature of this arc curve is that the far-vision area is in the upper part and the near-vision area is in the lower part after fitting the glasses, and the arc of the intersection line 4 is an upward-curved upper arc. The larger the diameter of the intersection line 4, the flatter the intersection curve, and the larger the field of view area of the far-vision area.

[0044] The structure of the utility model is just opposite to the structure of the current invisible bifocal lens, the invisible bifocal lens is provided with a convex lens of 100-300 degrees below the single vision lens, so that the diopter of the near light area of the lower added light is reduced by 100-300 degrees than the diopter of the periphery far light area, and it is suitable for near vision, the area of the lower near vision area is obviously smaller than the area of the upper far vision area, when the near vision area is large, the intersection line is not a circular or elliptical line, but a lower arc line which is downwardly bent, and the utility model is provided with a concave lens in the center area or upper area of the single vision lens, so that the diopter of the center far light area or upper far light area is increased by 100-350 degrees, and it is suitable for far vision, and the area of the far vision area is smaller than the area of the near vision area, and the large near vision area is more suitable for myopia prevention and control, the intersection line 4 is on the inner surface of the lens, and in actual wearing, the reflection of the outer surface or the cover of the inner intersection line 4 makes the intersection line 4 not obvious from the outside, the intersection line 4 can be polished to be smooth to form a spherical ring-shaped circular arc transition surface, even if it is held in the near place, the existence of the intersection line cannot be seen, and the invisible bifocal lens becomes a real bifocal lens.

[0045] The bending arc radius R2 of the near light area 2 is greater than the bending arc radius R3 of the far light area 3, that is, R3 < R2, and the diopter of the near light area 2 and the far light area 3 is different by 50-600 degrees.

[0046] When the center far light area 3 is a piano, the periphery near light area 2 is a certain diopter in +50 degrees to +600 degrees, becomes an invisible bifocal far vision lens, and is suitable for being used as an aging lens, and the near vision area is larger than that of the traditional bifocal presbyopia lens.

[0047] The +50 degrees to +600 degrees, that is, +0.50D, +0.75D, +1.00D, +1.25D, +1.50D, +1.75D, +2.00D, +2.25D, +2.50D, +2.75D, +3.00D, +3.25D, +3.50D, +4.00D, +4.25D, +4.50D, +4.75D, +5.00D, +5.25D, +5.50D, +5.75D, +6.00D and the like, due to the machining error, the actual range is not limited to the listed values, and other values in the range are also applicable.

[0048] The invisible bifocal lens 1 of the utility model is suitable for vision correction.

[0049] The lens 1 is installed in the frame, and a frame glass is matched, so that the invisible bifocal lens 1 becomes an invisible bifocal glass, and the glass has the effects of vision correction, prevention and control of myopia, and can be used for reading books, learning or watching mobile phones, and is also suitable for old people to see far and near.

[0050] The transition toric surface is set at the intersection line of the far light area 3 and the near light area 2 of the inner surface of the lens 1, and due to the reflection of the outer toric surface, the intersection line and the transition arc of the inner transition toric surface are not easy to be seen even if the radius of the arc is small or the edge line.

[0051] The diameter of the far light area 3 of the aforementioned lens 1 is preferably 18-100mm, and more preferably 20-60mm, including any numerical value therein, and the remaining lens part is the near light area 2.

[0052] The aforementioned bifocal lens can be combined with a prism to form a prism contact bifocal lens, which is convenient for correcting strabismus.

[0053] The aforementioned bifocal lens can be combined with aspheric technology to form an aspheric contact bifocal lens.

[0054] The aforementioned bifocal lens can also be made on the outer surface of the lens, and the inner and outer surfaces can be replaced with each other, and all the structural features are as described above, and the inner surface is a spherical surface or an ellipsoidal surface, which becomes an outer contact bifocal lens.

[0055] The myopia degree of the center far light area 3 of the lens is greater than the myopia degree of the peripheral near light area 2 by 75-350 degrees, and in practice, it is not possible to make it completely consistent due to processing errors, and the degree of the lens can be changed within the normal processing accuracy error range. The degree within a certain acceptable change degree range is also within the protection range of the present application.

[0056] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A contact bifocal lens characterized by: The lens (1) inner surface or outer surface is composed of near light area (2) and far light area (3), the far light area (3) is spherical or ellipsoidal, the near light area (2) is spherical or ellipsoidal, the bending radius of the far light area (3) is smaller than that of the near light area (2), the far light area has a constant degree, the degree of the near light area (2) is 75-350 degrees different from that of the far light area (3), the intersection of the near light area (2) and the far light area (3) is the intersection line (4) or the transition arc (6), the optical center O2 of the near light area (2) is on the central axis of the lens (1) or the lower position, the optical center O3 of the far light area (3) is on the central axis of the lens (1) or the upper position, at least one of the near light area (2) and the far light area (3) has an optical center.

2. The contact bifocal lens of claim 1, wherein: The outer surface of the lens (1) is spherical, the inner surface of the lens (1) is composed of near light area (2) and far light area (3), the far light area (3) is concave in the central area of the lens, the optical center O3 of the far light area (3) is on the central O point of the lens (1), and the spherical centers of the near light area and the far light area are coincident with the central axis of the lens.

3. The contact bifocal lens of claim 1, wherein: The outer surface of the lens (1) is spherical, the inner surface of the lens (1) is composed of near light area (2) and far light area (3), the intersection line (4) coincides with the central O point of the lens (1), the optical center O3 of the far light area (3) is on the central axis O point of the lens (1) at the upper position of 2-+10MM, and the optical center O2 of the near light area (2) is on the central axis O point of the lens (1) at the lower position of 2-10MM.

4. The contact bifocal lens of claim 1, wherein: The outer surface of the lens (1) is spherical, the inner surface of the lens (1) is composed of near light area (2) and far light area (3), the optical center O2 of the near light area (2) is on the central axis of the lens (1), the optical center O3 of the far light area (3) is on the central axis O point of the lens (1) at the upper position, the intersection line (4) or the transition arc (6) is above the central O point of the lens, and the optical center O3 of the far light area and the optical center O2 of the near light area are distributed on the upper and lower sides of the intersection line (4) or the transition arc (6).

5. The contact bifocal lens of claim 1, wherein: The outer surface of the lens (1) is spherical, the inner surface of the lens (1) is composed of near light area (2) and far light area (3), the optical center O3 of the far light area (3) is on the central axis of the lens (1), and the optical center O3 of the far light area and the optical center O2 of the near light area are distributed on the upper and lower sides of the intersection line (4) or the transition arc (6).

6. The contact bifocal lens of claim 1, wherein: The lens (1) inner surface or outer surface adds astigmatic degree.

7. The contact bifocal lens of any one of claims 1 to 6, wherein: The intersection line of the far light area (3) and the near light area (2) of the lens (1) inner surface is provided with a transition arc (6).

8. The contact bifocal lens of any one of claims 1 to 6, wherein: The double light lens (1) is a non-spherical contact double light lens combined with non-spherical technology.

9. The contact bifocal lens of any one of claims 1 to 6, wherein: The central far light area (3) is flat, the peripheral near light area (2) has a degree of +50 to +600 degrees, and becomes a contact double light far vision lens.

10. The contact bifocal lens of any one of claims 1 to 6, wherein: The lens is selected and cut according to the shape of the frame from the lens, and is installed in the frame to become a contact double light lens.

11. The contact bifocal lens of any one of claims 1 to 6, wherein: The far light area and the near light area of the lens are on the outer surface of the lens, and the inner surface is spherical or ellipsoidal, which becomes an outer contact double light lens.

12. The contact bifocal lens of any one of claims 1 to 6, wherein: The lens has a high beam zone diameter of 18-100 mm and a low beam zone area.

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