Individualized three-focus frame spectacle lens

Abstract

Individualized three-focus frame spectacle lenses belong to the technical field of spectacles. The spectacle lens comprises a middle-distance visual area in the central area of a main lens, an upper-side long-distance visual area and a lower-side short-distance visual area, the middle-distance visual area is provided with a narrowest height of 1 mm to 8 mm of a vertical diameter line, and a horizontal diameter line is as long as the diameter of the spectacle lens. The long-distance visual area and the short-distance visual area are arranged to be the same or different in diameter, the diameterranges from 10 mm to 45 mm, and the width of the peripheral area ranges from 1 mm to 8 mm. According to subjective optometry from 5 m to 2 m, from 1.9 m to 60 cm and from 59 cm to 30 cm, the refractive power of a long-distance vision area, a middle-distance vision area and a short-distance vision area is customized, the refractive power gradient difference value is + / - 0.01 D to 0.25 D, the short-distance vision area is provided with a prism lens of which the substrate facing the nose side is 0.5 to 10.0 delta, and the long-distance vision area and the short-distance vision area provide 0.1 DS to 1.00 DS surface astigmatism distribution.

Description

technical field [0001] The invention belongs to the technical field of eyeglasses. Specifically, according to the subjective optometry of the individual spectacle wearer, the refractive power of the far, middle, and near vision areas of the spectacle lens is customized to provide an excellent vision in the distance, middle, and near distances. Low astigmatism frame spectacle lenses. Background technique [0002] The incidence and number of children and adolescents with myopia in my country rank first in the world, and the number of children and adolescents with myopia is 270 million. The prevention and control of children and adolescents with myopia is one of the concerns of the whole society. With the aging of the population, there are 490 million people over the age of 38 in my country, and presbyopia vision correction is also one of the social concerns. There are 760 million people with presbyopia and myopia in children and adolescents in my country, which has a huge mar...

AI Technical Summary

Problems solved by technology

Strictly speaking, whether the so-called trifocal intraocular lens is a customized product based on individual subjective optometry, and the intraocular lens cannot be prepared according to the difference of the refractive power gradient of the intraocular lens ± 0.05D, so the trifocal intraocular lens cannot obtain the best postoperative clear distance, middle and short-range vision , at least the postoperative visual acuity of the implanted lens cannot be predicted by subjective experience before the operation

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