Progressive lens suitable for people wearing glasses for first time

Abstract

The utility model discloses a progressive lens suitable for people wearing glasses for the first time, which comprises a plano area positioned at the upper half part of the progressive lens and a near area positioned at the lower half part of the progressive lens, and the near area is used for seeing an object in a close range; the plano area and the near-distance area are connected through a progressive channel, and the progressive channel is in an hourglass shape and used for middle-distance object viewing. The length L of the progressive channel is 18mm, and the progressive channel performs degree jump by taking 0.10 D as a step; astigmatism areas are arranged on the left and right sides of the progressive channel. The progressive channel between the plano area and the near-use area of the progressive lens is long in length and gentle in degree change, so that the eyes of a wearer, especially a primary wearer, can better adapt to the degree change of the progressive lens, the fatigue feeling is not easy to generate, and the requirement of long-term wearing is met.

Description

Technical Field

[0001] The utility model relates to the technical field of progressive lenses, and particularly relates to a progressive lens suitable for people wearing glasses for the first time. Background Art

[0002] Presbyopia is a normal physiological phenomenon of the human body and a signal of the body's aging. When a person looks at close objects, the light focus will fall behind the retina. At this time, the lens will bulge to adjust the position of the retina to make the image clear. As a person ages, the density of the eye lens will continuously increase, resulting in reduced elasticity and the inability to bulge appropriately to adjust the retina to the correct position, making it blurred to see close objects.

[0003] Although traditional presbyopic glasses can solve the problem of blurred vision when presbyopic patients look at close objects, the design of their single focal length limits the wearer's flexible switching between far and near vision. When switching between looking far and near, it is necessary to frequently take off and put on glasses, increasing the cumbersome nature of daily use. In response to the above problems, a progressive lens has emerged, which has both a plano zone and a near vision zone, enabling one lens to see both far and near without the need to frequently change glasses.

[0004] However, due to the sharp change in the degree between the plano zone and the near vision zone of the existing progressive lenses, some presbyopic patients will experience eye fatigue and be unable to wear them for a long time when first fitting this type of glasses due to insufficient adaptability to the lenses. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a progressive lens suitable for people wearing glasses for the first time, in which the progressive channel length between the plano zone and the near vision zone is longer and the degree change is gentle, enabling the wearer's eyes, especially those wearing glasses for the first time, to better adapt to the degree change of the progressive lens, being less likely to produce a sense of fatigue and being easier to wear for a long time.

[0006] To achieve the above object, the solution of the utility model is: a progressive lens suitable for people wearing glasses for the first time, including a plano zone located in the upper half of the progressive lens and a near vision zone located in the lower half of the progressive lens, and the near vision zone is used for seeing close objects;

[0007] The plano zone and the near vision zone are connected by a progressive channel, and the progressive channel is in an hourglass shape and is used for seeing medium-distance objects; the length L of the progressive channel is 18 mm, and the degree jumps in the progressive channel are in steps of 0.10 D;

[0008] The left and right sides of the progressive channel have astigmatic zones.

[0009] Furthermore, the additional power range of the progressive lens is +1.75 D to +2.00 D.

[0010] Furthermore, the material of the progressive lens is PC, MR-7 or MR-8.

[0011] Furthermore, the diameter range of the progressive lens is 73mm to 85mm.

[0012] Furthermore, the diameter of the progressive lens is 73mm, 75mm, 80mm or 85mm.

[0013] Furthermore, the thickness range of the progressive lens is 1.0 to 2.0mm.

[0014] Furthermore, the refractive index of the progressive lens is 1.58, 1.60 or 1.67.

[0015] After adopting the above scheme, the beneficial effects of the present utility model are as follows:

[0016] The progressive lens of the present utility model has a plano zone and a near vision zone, which is suitable for people with presbyopia but without myopia. The progressive channel length between the plano zone and the near vision zone of the progressive lens is relatively long, which can reach 18mm, and the jump degree in the channel is 0.10D per step, and the degree change is gentle. This design is very friendly to people who have just developed presbyopia and is not very serious and are wearing progressive multifocal glasses for the first time. It can not only enable the eyes of this kind of people to better adapt to the degree change of the lens, but also is not easy to cause fatigue and is easier to wear for a long time. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the partition structure of the progressive lens according to an embodiment of the present utility model.

[0018] Label Description:

[0019] 1, plano zone; 2, near vision zone; 3, progressive channel; 4, astigmatic zone. Detailed Embodiment

[0020] The following will describe the present utility model in detail with reference to the drawings and specific embodiments.

[0021] The present utility model provides a progressive lens suitable for people who are wearing glasses for the first time, applicable to people who only have presbyopia and no myopia problems, especially suitable for first-time wear.

[0022] Such as Figure 1As shown, it includes a plano zone 1, a near vision zone 2, a progressive channel 3, and an astigmatism zone 4. Among them, the plano zone 1 has no diopter, that is to say, it does not refract light to change the focal length of the eyes, and thus does not change the vision of the wearer. The plano zone 1 is located in the upper half of the lens and is used for viewing distant objects, enabling the wearer to enjoy a natural visual experience when no additional correction for hyperopia or myopia is required. The near vision zone 2 is located in the lower half of the lens and is used for viewing objects at close range, such as in scenarios like reading, writing, or using electronic devices, etc.; the astigmatism zone 4 is located on the left and right sides of the progressive channel 3 of the lens, which is an inevitable phenomenon in progressive multifocal lenses.

[0023] The key to this case lies in the precise design of the progressive channel 3, such as Figure 1 As shown, the progressive channel 3 is the key area for the smooth transition between the plano zone 1 and the near vision zone 2 and is used for viewing objects at medium distances. In the present utility model, the progressive channel 3 is in an hourglass shape, and the ratio of the width W1 at the narrowest part to the width W2 at the widest part of the hourglass-shaped progressive channel 3 is 0.4 - 0.8. That is, the upper and lower ends of the progressive channel 3 are infinitely close to the upper plano zone 1 and the lower near vision zone 2 respectively, presenting a relatively smooth transition, which can improve the comfort of switching between distant vision and near vision.

[0024] The progressive channel 3 is a long channel, and its length L is designed to be 18 mm. This length provides a sufficient visual transition area for users. At the same time, in this progressive channel, the diopter jump is in steps of 0.10 D. This combination of a long progressive channel and a relatively gentle diopter jump design greatly reduces the abruptness during diopter conversion. It not only makes the switching of the user's glasses between the distant vision area and the near vision area smoother and more natural without the feeling of image jump, but also slightly reduces the fatigue of the glasses, enabling the user to quickly adapt to the progressive lens and improving the wearing comfort.

[0025] In addition, due to the use of this relatively gentle diopter jump design of 0.10 D, the severity of the diopter change is reduced, thereby reducing the optical distortion and astigmatism caused by the diopter change. Therefore, the astigmatism zone 4 will also be relatively small. Similarly, for users with a relatively mild degree of presbyopia, the area of the astigmatism zone 4 can be further reduced by reducing the addition (ADD, the absolute value of the difference between the distant vision diopter and the near vision diopter, the plano diopter is 0) value of the progressive lens. In this embodiment, for the needs of the presbyopic population, a progressive lens with a specific addition range is designed. The addition range of the progressive lens is set to +1.75 D to +2.00 D, and this range of selection covers the population from mild to moderate presbyopic symptoms.

[0026] The materials of the progressive lenses described in this utility model can be selected from high-quality materials such as PC (polycarbonate), MR-7 or MR-8. Among them, PC materials have the characteristics of high toughness and strong impact resistance; while MR-7 and MR-8 series materials have characteristics such as high light transmittance, lightweight design and scratch resistance.

[0027] In this embodiment, the refractive index of the progressive lenses 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.

[0028] The diameter range of the progressive lenses is 73mm - 85mm to meet the needs of different face shapes and wearing habits. Preferably, the diameters of the progressive lenses are 73mm, 75mm, 80mm or 85mm, and these sizes can better adapt to the facial contours of most users.

[0029] Furthermore, the progressive lenses adopt a lightweight design, and the range of the central thickness of the progressive lenses is controlled between 1.0 - 2.0mm, which can not only reduce the load-bearing burden on the nose bridge and ears, but also improve the wearing comfort and convenience, allowing users to enjoy a clear vision for a long time without burden.

[0030] The specific preparation method of the progressive lenses of this utility model is as follows:

[0031] (1) Heat and dry the lens raw materials;

[0032] (2) Inject the raw materials into a mold to obtain a blank sheet, and then perform surface treatment.

[0033] (3) According to the data on the prescription form for glasses, scan it into the machine and calculate the data for lens surface processing;

[0034] (4) Apply vacuum film to the surface of the lens to be processed;

[0035] (5) Perform alloy mounting on the film-coated lens to fix the lens surface;

[0036] (6) Grind and polish;

[0037] (7) Spin-coat and harden;

[0038] (8) Vacuum coat;

[0039] (9) Cut into special shapes.

[0040] To further illustrate the embodiments, the present utility model provides attached drawings. These attached drawings are part of the disclosure of the present utility model, mainly used to illustrate the embodiments and can be used in conjunction 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 orientations such as up, down, front, back, left, and right involved in this embodiment are only for reference of an orientation and do not represent the orientations in actual use.

[0041] 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. A progressive lens suitable for first-time eyeglass wearers, characterized by: It includes a plano area located in the upper part of the progressive lens and a near area located in the lower part of the progressive lens, and the near area is used for close-up vision. The plano area and the near area are connected by a progressive channel, which is hourglass-shaped and used for medium-distance vision. The length of the progressive channel L is 18mm, and the degree jump is 0.10D per step in the progressive channel. There are astigmatism areas on the left and right sides of the progressive channel.

2. A progressive lens suitable for first-time eyeglass wearers as claimed in claim 1, characterized in that: The lower addition range of the progressive lens is from +1.75D to +2.00D.

3. The progressive lens suitable for first-time eyeglass wearers as claimed in claim 1, characterized in that: The material of the progressive lens is PC, MR-7 or MR-8.

4. The progressive lens suitable for first-time eyeglass wearers as claimed in claim 1, characterized in that: The diameter of the progressive lens ranges from 73 mm to 85 mm.

5. The progressive lens suitable for first-time eyeglass wearers as claimed in claim 4, characterized in that: The diameter of the progressive lens is 73 mm, 75 mm, 80 mm or 85 mm.

6. The progressive lens suitable for first-time eyeglass wearers as claimed in claim 1, characterized in that: The thickness of the progressive lens is in the range of 1.0 to 2.0 mm.

7. The progressive lens suitable for first-time eyeglass wearers as claimed in claim 1, characterized in that: The refractive index of the progressive lens is 1.58, 1.60 or 1.67.

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