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Method for predicting postoperative position of artificial crystalline lens

A technology of intraocular lens and related equations, applied in the direction of intraocular lens, eye implant, etc., can solve the problem that it is not enough to accurately predict the postoperative IOL position of cataract, and achieve the effect of improving accuracy

Active Publication Date: 2020-05-19
ZHONGSHAN OPHTHALMIC CENT SUN YAT SEN UNIV
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  • Summary
  • Abstract
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Problems solved by technology

[0038] However, these methods are currently not sufficient to accurately predict the postoperative IOL position for all types of cataracts

Method used

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  • Method for predicting postoperative position of artificial crystalline lens
  • Method for predicting postoperative position of artificial crystalline lens

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Embodiment Construction

[0050] The present invention is a method for predicting the effective position of an intraocular lens, the method comprising the following steps:

[0051] Step 1. Measure as comprehensive ocular parameters as possible.

[0052] The effective intraocular lens position (ELP) is defined as the vertical distance from the posterior apex of the cornea to the visual axis of the optical surface of the intraocular lens. It reflects the longitudinal position of the IOL within the eye, the fusion and fibrosis processes of the lens capsule generate forward and backward forces, and the ELP reflects the imbalanced results of those forces. When the intraocular lens moves forward, it causes myopic shift and when it moves backward, it causes hyperopic shift. Therefore, ELP determines the refractive status after cataract surgery.

[0053] ELP is not only affected by preoperative ocular parameters (AL, K, ACD, LT, WTW), but also surgical factors are another major aspect affecting ELP, including d...

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Abstract

The invention provides a method for predicting an effective position of an artificial crystalline lens. By virtue of the method, the effective position of the postoperative crystalline lens can be effectively predicted. The method for predicting the effective position of the artificial crystalline lens comprises the following steps: (1) acquiring eye parameters, wherein the eye parameters includeciliary body parameters and suspensory ligament parameters; (2) carrying out correlation analysis on the eye parameters and an eye pouch shrinkage factor, and establishing a parameter correlation equation for the eye pouch shrinkage factor and the eye parameters; and (3) establishing an ELP model according to the eye pouch shrinkage factor, so as to predict the effective position of the artificialcrystalline lens. Preferably, the eye parameters acquired in the step (1) further include anterior chamber parameters and crystalline lens parameters. Preferably, the suspensory ligament parameters in the step (1) include suspensory ligament looseness.

Description

technical field [0001] The invention relates to the technical field of intraocular lenses, in particular to a method for predicting postoperative positions of intraocular lenses. Background technique [0002] Cataracts are darkened areas that can appear in the natural lens of the eye, ranging from slightly darkened to completely clouded. Currently, surgical procedures for cataract treatment by replacing the natural lens with an artificial lens have been developed. In this procedure, an incision is made in the eye and the natural lens is removed, which is then inserted with an artificial implant called an intraocular lens (IOL) such as In the capsule bag of the eye, replacing the natural lens. [0003] The concept of modern cataract surgery has changed from vision restoration surgery to refractive surgery, and cataract patients have continuously improved their expectations for postoperative uncorrected vision and visual quality. Accurate intraocular lens power calculation i...

Claims

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Application Information

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IPC IPC(8): A61F2/16
CPCA61F2/16
Inventor 吴明星刘良平李剑冰程欢欢许焱鑫丁瑀洁
Owner ZHONGSHAN OPHTHALMIC CENT SUN YAT SEN UNIV
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