Myopia and presbyopia progressive lens easy to adapt

Abstract

The utility model discloses a myopia and presbyopia progressive lens easy to adapt. The myopia and presbyopia progressive lens comprises a far use area, a near use area, a channel area and an astigmatism area, the far-distance area is positioned at the upper half part of the lens and is used for long-distance object viewing; the near-distance area is located at the lower half part of the lens and is used for near-distance object viewing; the channel area is located between the far-distance area and the near-distance area, is in an hourglass shape and is used for observing objects in the middle distance. The length L of the channel area is 20mm, and the channel area jumps by taking 0.15 D as a step; the astigmatism areas are located on the left and right sides of the lens channel area. Due to the unique long channel and gentle degree jump design of the progressive lens, visual experience is optimized, visual fatigue is reduced, wearing adaptability is enhanced, and the progressive lens is particularly suitable for young myopia and presbyopia people and brings clear vision field and comfortable wearing feeling to the young myopia and presbyopia people.

Description

Technical Field

[0001] The utility model relates to the technical field of progressive lenses, and particularly relates to a myopia presbyopia progressive lens that is easy to adapt to. Background Art

[0002] With the acceleration of the modern life rhythm and the wide application of electronic products, these two vision problems, myopia and presbyopia, are becoming increasingly common in the population, and show a trend of being younger and co-existing. Myopic patients have an overly long eye axis due to long-term close-range eye use and bad eye use habits, causing light to focus in front of the retina, which affects the clarity of distant vision. As people age, even myopic patients' eye lenses gradually lose elasticity and the accommodation ability decreases, resulting in presbyopia, that is, light focuses behind the retina when looking at close objects, causing difficulties in reading or fine operations. Patients with both myopia and presbyopia need to wear myopia glasses and hyperopia glasses at the same time, and frequently change glasses when looking at far and near, which brings a lot of inconvenience to life.

[0003] Although progressive multifocal lenses have been introduced in the market, mainly by designing different degrees in different areas of the lens to solve myopia correction, presbyopia correction and the need for middle-distance vision at the same time. However, the existing progressive multifocal lenses still have significant deficiencies in wearing comfort. Especially for first-time wearers, due to the complex lens design, the existence of the visual transition area may cause problems such as visual distortion, dizziness or visual fatigue, seriously affecting the user's adaptation process and use experience. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a myopia presbyopia progressive lens that is easy to adapt to, with a longer channel area length and a gentle degree change, so that the eyes of users, especially first-time wearers, can better adapt to the progressive lens and improve the wearing comfort.

[0005] To achieve the above object, the solution of the utility model is: a myopia presbyopia progressive lens that is easy to adapt to, including a distance vision area, a near vision area, a channel area and an astigmatic area;

[0006] The distance vision area is located in the upper half of the lens and is used for distant vision;

[0007] The near vision area is located in the lower half of the lens and is used for near vision;

[0008] The channel area is located between the distance vision area and the near vision area, in a hourglass shape, and is used for middle-distance vision; the length L of the channel area is 20 mm, and the degree jumps in the channel are in steps of 0.15 D;

[0009] The astigmatic area is located on the left and right sides of the lens channel area.

[0010] Furthermore, the additional power range of the progressive lens is +1.75D to +2.50D.

[0011] Furthermore, the ratio of the width W1 at the narrowest part to the width W2 at the widest part of the channel area is 0.4 to 0.6.

[0012] Furthermore, the diameter range of the progressive lens is 73mm to 85mm.

[0013] Furthermore, the diameter of the progressive lens is 73mm, 75mm, 80mm or 85mm.

[0014] Furthermore, the material of the progressive lens is PC, MR-7 or MR-8.

[0015] Furthermore, the thickness range of the progressive lens is 1.0 to 2.0mm.

[0016] Furthermore, the refractive index of the progressive lens is 1.58, 1.60 or 1.67.

[0017] After adopting the above scheme, the beneficial effects of the present utility model are as follows:

[0018] The progressive lens of the present utility model has a long channel area, the length of the channel area reaches 20mm, and the degree jumps in steps of 0.15D within the channel. This design of long channel plus gentle degree jump ensures visual continuity during the conversion from the visual far area to the visual near area, greatly reduces the visual jump feeling, and makes the visual transition smoother and more natural. For users who are trying progressive lenses for the first time, the longer channel area provides a more generous adaptation space, reduces the discomfort caused by rapid or drastic visual changes, and accelerates the user's adaptation process.

[0019] Through the finely controlled 0.15-degree jump design, the progressive lens effectively limits the spread of the astigmatic area, and can reduce visual distortion or blurring phenomena caused by the expansion of the astigmatic area compared with traditional progressive lenses, further improving visual clarity and wearing comfort.

[0020] In summary, the progressive lens of the present utility model, with its unique long channel and gentle degree jump design, not only optimizes the visual experience, reduces visual fatigue, but also enhances wearing adaptability. It is especially suitable for young myopic presbyopic people, bringing them a clear vision and a comfortable wearing experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the partition structure of the progressive lens according to an embodiment of the present utility model.

[0022] Label description:

[0023] 1. Distance vision area; 2. Near vision area; 3. Transition area; 4. Astigmatism area. Detailed implementation mode

[0024] The following will combine the attached drawings and specific embodiments to make a detailed description of the present utility model.

[0025] The present utility model provides an easy-to-adapt myopic presbyopic progressive lens. As Figure 1 shown, the progressive lens is divided into multiple areas, including a distance vision area 1, a near vision area 2, a transition area 3, and an astigmatism area 4. Among them, the distance vision area 1 is located in the upper half of the lens and is used for viewing objects at a distance, allowing the wearer to easily enjoy the distant scenery or perform daily long-distance activities; the near vision area 2 is located in the lower half of the lens and is used for viewing objects at a short distance, such as reading, writing, or using electronic devices, etc.; the astigmatism area 4 is located on the left and right sides of the transition area 3 of the lens, which is a phenomenon that is difficult to completely avoid in progressive multifocal lenses.

[0026] The key to this case lies in the fine design of the transition area 3. As Figure 1 shown, the transition area 3 is the key transition area between the distance vision area 1 and the near vision area 2 and is used for viewing objects at medium distances. The transition area 3 is in the shape of an hourglass, and the ratio of the width W1 at the narrowest part to the width W2 at the widest part of the hourglass-shaped transition area 3 is 0.4 - 0.6. That is, the upper and lower ends of the transition area 3 are infinitely close to the upper distance vision area 1 and the lower near vision area 2 respectively, showing a relatively smooth transition, which can improve the comfort of switching between distance vision and near vision.

[0027] The length L of the transition area 3 is designed to be 20 mm. This length ensures sufficient transition space. At the same time, the degree jump is carried out in steps of 0.15 D within this transition area. This long transition area combined with a relatively gentle degree jump design not only makes the user's eyes switch more smoothly and naturally between the far vision area and the near vision area without the feeling of image jump, but also slightly reduces the fatigue of the eyes, enabling the user to quickly adapt to the progressive lens and improving the wearing comfort.

[0028] In addition, due to the use of this relatively gentle degree jump design of 0.15 D, the severity of the degree change is reduced, thereby reducing the optical distortion and astigmatism caused by the degree change. Therefore, the astigmatism area 4 will also be relatively small. Similarly, for users with a relatively mild presbyopia, the area of the astigmatism area 4 can be further reduced by reducing the addition (ADD, the absolute value of the difference between the distance vision degree and the near vision degree) value of the progressive lens. In this embodiment, for the needs of the myopic presbyopic population, a progressive lens with a specific addition range is designed, and the addition range of the progressive lens is set to +1.75 D to +2.50 D. The selection of this range covers myopic people with mild to moderate presbyopia symptoms.

[0029] The following are the specifications and material selections of this progressive lens:

[0030] In terms of material selection, the materials for the progressive lenses of this application can be PC (polycarbonate), MR-7 or MR-8. PC material is famous for its high toughness and strong impact resistance, and is especially suitable for sports or active users; while MR-7 and MR-8 are well-known for their excellent light transmittance, light weight and scratch resistance, providing an ideal choice for users who pursue clear vision and long-term wearing comfort.

[0031] The diameter range of the progressive lens is 73mm to 85mm to meet the needs of different face shapes and wearing habits. Preferably, the diameter of the progressive lens is 73mm, 75mm, 80mm or 85mm, and these sizes can better adapt to the facial contours of most users.

[0032] The thickness (referring to the center thickness) of the progressive lens is controlled within the range of 1.0 to 2.0mm to achieve the thinning of the lens and reduce the burden on the nose bridge and ears.

[0033] The refractive index of the progressive lens is 1.58, 1.60 or 1.67. For the selection of different refractive indices, users can flexibly adjust according to their own degree requirements and wearing preferences.

[0034] The specific preparation method of the progressive lens of the present utility model is as follows:

[0035] (1) Heat and dry the lens raw materials;

[0036] (2) Inject the raw materials into a mold to obtain a blank sheet, and then perform surface treatment.

[0037] (3) According to the data on the prescription form for glasses, scan it into the machine and calculate the data for lens surface processing;

[0038] (4) Perform vacuum film coating on the surface of the lens to be processed;

[0039] (5) Perform alloy mounting operation on the film-coated lens;

[0040] (6) Grind and polish;

[0041] (7) Spin-coat and harden on one side;

[0042] (8) Vacuum coat;

[0043] (9) Cut into special shapes.

[0044] To further illustrate the embodiments, the present utility model provides accompanying drawings. These drawings are a part of the disclosure of the present utility model, which are mainly used to illustrate the embodiments and can be combined with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. At the same time, the upper, lower, front, rear, left, right and other orientations involved in this embodiment are only for reference of an orientation and do not represent the orientations in actual use.

[0045] The above are only the preferred embodiments of the present utility model and do not limit the design of this case. All equivalent changes made according to the key design of this case fall within the protection scope of this case.

Claims

1. An easily adaptable progressive lens for myopia and presbyopia, characterized by: Including far-viewing area, near-viewing area, channel area and astigmatism area; The distance zone is located in the upper part of the lens and is used for long-distance vision. The near zone is located in the lower half of the lens and is used for close viewing. The channel area is located between the distance area and the near area, and is hourglass-shaped, and is used for medium-distance vision. The length of the channel area L is 20mm, and the degree jump in the channel is 0.15D as a step. The astigmatism area is located on the left and right sides of the lens channel area.

2. The easily adaptable myopia and presbyopia progressive lens according to claim 1, characterized in that: The lower addition range of the progressive lens is from +1.75D to +2.50D.

3. The easily adaptable myopia and presbyopia progressive lens according to claim 1, characterized in that: The ratio of the narrowest width W1 to the widest width W2 of the channel zone is 0.4-0.

6.

4. The easily adaptable myopia and presbyopia progressive lens according to claim 1, characterized in that: The diameter of the progressive lens ranges from 73 mm to 85 mm.

5. The easily adaptable myopia and presbyopia progressive lens according to claim 4, characterized in that: The diameter of the progressive lens is 73 mm, 75 mm, 80 mm or 85 mm.

6. The easily adaptable myopia and presbyopia progressive lens according to claim 1, characterized in that: The material of the progressive lens is PC, MR-7 or MR-8.

7. The easily adaptable myopia and presbyopia progressive lens according to claim 1, characterized in that: The thickness of the progressive lens is in the range of 1.0 to 2.0 mm.

8. The easily adaptable myopia and presbyopia progressive lens according to claim 1, characterized in that: The refractive index of the progressive lens is 1.58, 1.60 or 1.67.

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