Method for designing intraocular lens for providing vision correction to patient due to loss of vision by AMD and positioning mechanism for intraocular lens

Abstract

The present invention provides a method for designing an intraocular lens for providing vision correction to a patient due to loss of vision by AMD, an eyeball optical model based on optical characteristics and aberration characteristics of a natural human eye comprises a cornea, a visual axis and an eccentric iris, wherein the front surface and the rear surface of the cornea are aspheric, the visual axis inclines relative to the symmetry axis of the eyes, the eccentric iris is eccentric to an entrance pupil, and a natural intraocular lens model with double aspheric surfaces is implanted intoa capsular bag of an eyeball; at least one aspheric intraocular lens is implanted into the eyeball; the intraocular lens is positioned between the iris and the capsular bag in the model eye and is positioned in the ciliary sulcus; the intraocular lens, the cornea and the natural intraocular lens model form a coaxial optical system; after the intraocular lens is tightly attached to the iris, the caliber of the intraocular lens is matched with the diameter of the iris in a reduced state.

Description

technical field [0001] The invention relates to the technical field of intraocular lenses, in particular to an intraocular lens design method and an intraocular lens positioning mechanism. Background technique [0002] Age-related macular degeneration (AMD) is a disease that affects the central macular area of ​​the retina, causing the elderly to lose vision in the central field of vision, while the vision in the peripheral area of ​​​​the patient is often not affected, so the ability to distinguish directions is maintained in the early stage. In the advanced stage, most patients lose the ability to read. [0003] To address age-related macular degeneration (AMD) technology, many different techniques have been invented, some systems rely on magnification of the image, however this approach requires sacrificing the field of view. For example, the implanted telephoto system, because this method reduces the visual angle of the human eye, the postoperative adaptation time is ex...

AI Technical Summary

Problems solved by technology

The intraocular lens implanted in the capsular bag is retained during cataract surgery. At present, there is no solution for this type of patients, and there is no solution for this type of patients to improve their reading vision.

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