Extraocular-zooming-combined focal length adjusting method for artificial lens

Abstract

The invention provides an extraocular-zooming-combined focal length adjusting method for an artificial lens. A creative part lies in that an entire adjustable design is divided into two parts, i.e., an intraocular part and an extraocular part, a relatively large range of adjustment is achieved with a relatively small amplitude of adjustment, the adjusting effect is good, and the limitation of thetraditional artificial lenses that only intraocular adjustment is available. The intraocular part is a spherical, non-spherical or other-optical-designed artificial lens, is used for partially correcting aberration of human eyes and has micro-adjustment capability. The extraocular part is an Alvarez or zoom lens with zooming capability, functions similar to those of a natural lens can be achievedthrough matching between the intraocular part and the extraocular part, namely stepless zooming from proximal places to distant places, and continuous clear vision is provided for a sufferer.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and relates to an intraocular lens and a variable focus lens, in particular to a focal length adjustment method of an intraocular lens combined with extraocular zooming. Background technique [0002] Cataract is the world's leading cause of blindness in ophthalmology. This disease can cause clouding of the lens and even loss of vision. Therefore, surgery is required to remove the cloudy lens and then put in an intraocular lens (IOLs), which not only restores vision but also ensures The integrity of the physiological structure of the human eye. However, the focal length of most intraocular lenses is single, and patients cannot see things at different distances after surgery. Even though multifocal IOLs can allow patients to obtain good distance and intermediate vision, they cannot see the details of things in the near distance. part, and halos and glare are caused by the superposition of ...

AI Technical Summary

Problems solved by technology

However, the adjustment ability of the former is very weak, usually only 1-2D, which is far inferior to that of the natural lens; although the adjustment ability of the latter is strong, the surface shape is uncontrollable, and the specific adjustment process is difficult to predict, and the structure of these AIOLs is complex, it is difficult to pass small The incision (below 3mm) is implanted into the eye

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