Progressive multi-focus lens

Abstract

The invention relates to a progressive multi-focus lens which is provided with a lens surface with 400 bending of a surface bending structure, wherein the upper part on the surface of the lens serves as a distant vision region, the lower part on the surface of the lens serves as a near vision region, a transition region is arranged between the distant vision region and the near vision region, and two sides of the transition region are respectively provided with an astigmatism region; an optometry cross is positioned above the horizontal line of the geometric center of the lens by 4mm, a distant vision reference point of the lens is positioned above the horizontal line of the geometric center of the lens by 8mm, and a near vision reference point of the lens is positioned under the geometric center of the lens by 12mm; and the narrowest width of the transition region is 3-7mm, and the astigmatism luminosity of an astigmatism region is equal to a lower ADD (attention deficit disorder) number+ / -0.15D. The progressive multi-focus lens provided by the invention is wide in a distant vision field, so that different crowds and different optometry requirements can be met, and wearers can have the wider distant vision field; the motion sickness symptom and the image jumping phenomenon of the wears can be basically eliminated; and the progressive multi-focus lens is applicable to the requirements of work, life and study of the different wears.

Description

technical field [0001] The invention relates to the technical field of ophthalmic lenses, and more specifically, the invention relates to a progressive multifocal lens. Background technique [0002] Presbyopia is a major visual defect in the elderly population. Presbyopic wearers need vision correction at different distances, such as distance, middle distance, and near vision. Therefore, it is required to integrate different refractive correction functions into the same lens to form glasses with multiple focal points. Progressive multifocal ophthalmic lenses can meet the needs of both distance vision and near vision, and also overcome the discontinuity of vision, broken images, and inconsistencies in middle-distance vision when people use bifocals to switch between far and near vision. Clear and other defects; At present, progressive multi-focal ophthalmic lenses have been widely used in major western countries, and are increasingly widely used in large and medium-sized citi...

AI Technical Summary

Problems solved by technology

[0005] Wearing progressive multi-focal ophthalmic lenses, although you can obtain a relatively satisfactory distance vision effect and a relatively satisfactory visual effect, but for different groups of people, different image distortions may occur when looking sideways; although it can be adjusted according to the wearer's personality personalized design, but the consequences of personalized design will inevitably lead to poor versatility

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