A Calculation Method of Diopter of Intraocular Lens

Abstract

The invention provides a method for calculating the diopter of an artificial lens, which is used to solve the problem of large errors in the calculation formula of the IOL diopter in the prior art. The intraocular lens diopter calculation method includes calculating the corneal refractive index through the tangential curvature of the anterior surface of the cornea, calculating the refractive index of the medium in the anterior chamber through the tangential curvature of the posterior surface of the cornea, and calculating , intraocular lens parameters, reserved diopter and the refractive index of each refractive medium of the whole eye to calculate the diopter of the intraocular lens. The present invention introduces the tangential curvature of the anterior surface of the cornea and the tangential curvature of the posterior surface of the cornea into the calculation, utilizes the depth of the anterior chamber, the thickness of the crystal, the ratio of the intrinsic shape of the anterior and posterior capsule of the lens, and the A constant of the artificial lens to accurately estimate the effective lens position, and Systematic calculation is carried out based on the refractive index and location of each refractive medium of the whole eye, which effectively improves the calculation accuracy of the diopter of the intraocular lens, and has a statistical difference.

Description

technical field [0001] The invention belongs to the field of medical artificial lens materials, and in particular relates to a method for calculating the diopter of an artificial lens. Background technique [0002] The eyes are the windows of the soul. As we age, the lens of the eye will experience aging phenomena such as fogging or clouding, which in turn affects vision. According to statistics, more than 90% of cataract cases originate from the inevitable aging process of human beings. The only truly effective treatment for cataracts is surgical treatment, that is, removing the opaque lens and replacing it with an intraocular lens (Intra Ocular Lens, IOL). IOL implantation is the most effective way to treat cataract. Thousands of cataract patients have gained good vision through this safe and effective surgical method. With the continuous improvement of cataract surgical equipment and surgical techniques, cataract surgery has gradually developed from the simple purpose ...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem of large error in the calculation formula of IOL diopter in the prior art and improve the accuracy of the calculation formula of IOL diopter, the embodiment of the present invention proposes a calculation method of IOL diopter. Based on ZZ IOL FORMULA, the IOL diopter is calculated. Completing the calculation of all the refraction paths of light in segments, and introducing the tangential curvature of the posterior surface of the cornea into the calculation of diopter, the method is simple, easy to operate, and high in accuracy, and is suitable for all patients

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