Wide-screen intelligent presbyopic lens and its preparation mold

Abstract

The invention discloses a wide screen intelligent presbyopic lens and a preparation mould thereof. The lens comprises a front surface and a rear surface, the front surface and / or rear surface are free-form surfaces, and each free-form surface comprises a far-view area, a near-view area, a transition area between the far-view area and the near-view area, and astigmatic areas, which are arranged on two sides of the transition area. People who use the presbyopic lens can see things in a far distance or in a near distance, and do not obviously feel a dead zone. The presbyopic lens has the advantages of convenient fitting and indoor multipurpose use. The invention also discloses a preparation mould of the wide screen intelligent presbyopic lens.

Description

technical field [0001] The invention relates to a wide-screen intelligent presbyopic lens, in particular to a preparation mold for a wide-screen intelligent presbyopic lens. Background technique [0002] At present, there are three kinds of presbyopic lenses used to correct the eyesight of the elderly: single vision presbyopic lenses, double vision presbyopic lenses and traditional presbyopic progressive lenses. [0003] For single-vision presbyopic lenses, it has only one diopter, and when the human eye observes objects at different distances, it needs different diopters. In order to see objects at different viewing distances, the human eye needs to be adjusted. Poor, or no adjustment ability at all. Therefore, for middle-aged and elderly people, single-vision presbyopic lenses may not be able to see clearly or easily cause visual fatigue. [0004] Middle-aged and elderly people can use bifocal lenses or progressive lenses in order to see objects at different viewing dista...

AI Technical Summary

Problems solved by technology

[0005] For bifocal presbyopic lenses, it has two diopters, which can be used for distance vision and near vision respectively. However, due to the rapid conversion of distance vision and near vision, it is easy for the elderly to wear bifocal presbyopia bifocal lenses. Visual fatigue

[0006] For traditional presbyopic progressive lenses, it has two diopters, which can be used for distance vision and near vision respectively. There is a transition zone in the middle, so distance vision and near vision are gradually converted. Therefore, in theory, the elderly wear progressive lenses It is not easy to produce visual fatigue. However, due to design and manufacturing defects, progressive lenses have annoying blind spots. Due to the existence of visual blind spots, it is difficult for the wearer of the glasses to adapt, and there is a great sense of discomfort. It is easy to cause visual fatigue, so the usual progressive lenses cannot meet the visual needs of the middle-aged and elderly people. For example, the invention patent ZL02829399-1 introduces a method for designing progressive lenses, see figure 1 , we downloaded the test chart of the progressive lens manufactured by this method from the official website of the patentee of the invention. We can see that the astigmatism of this progressive lens is ADD=150 and the maximum astigmatism is 200, which shows that the ZL02829399-1 progressive lens still has a relatively large Large visual blind area, easy to produce uncomfortable feeling after wearing, that is to say, easy to produce visual fatigue

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