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

A technology of intraocular lens and vision correction, which is applied in the direction of intraocular lens, eye implant, medical science, etc., can solve the problems that there is no solution for such patients, and there is no solution for improving reading vision of patients, so as to improve reading Visual acuity, retained viewing angle and magnification, and the effect of increased imaging magnification

Pending Publication Date: 2020-03-06
易虹 +1
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Problems solved by technology

The intraocular lens implanted in the capsular bag is retained during cataract surgery. At present, there is no sol

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

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Embodiment Construction

[0040] The technical solutions in the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0041] Such as Figure 1-10 The present invention proposes a method for designing an intraocular lens for providing vision correction for patients due to AMD loss of vision, based on a precise eyeball optical model of natural human eye optical properties and aberration properties, including anterior surface 11 and posterior surface 12 are both Aspherical cornea 1, visual axis 15 tilted relative to the symmetry axis 16 of the eye, eccentric iris 4 with eccentric entrance pupil, a double-sided aspheric natural intraocular lens model 3 implanted in the capsular bag 6 of the eyeball; close to the nose The orientation of the iris 4 is eccentric by 0.5mm. Then implant at least one aspheric intraocular lens 2 in the eyeball; the intraocular lens 2 is positioned between the iris 4 and the capsular bag 6 in the eye and is positioned a...

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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...

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Application Information

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IPC IPC(8): A61F2/16
CPCA61F2/1613A61F2/1662A61F2002/1681A61F2240/005
Inventor 易虹殷蔚
Owner 易虹
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