Calculating system for IOL rear surface average value after corneal refraction operation

Abstract

The invention discloses a calculating system for IOL rear surface average value after corneal refraction operation, and the system comprises a calculation origin selection module and a calculation module; the calculation origin selection module comprises a corneal vertex and a pupil center point, and the corneal vertex corresponds to a curvature average value in a first range, a curvature average value in a second range and a curvature average value in a third range; the pupil center point corresponds to the curvature average value on the first ring, the curvature average value on the second ring and the curvature average value on the third ring, and the calculation module comprises a first calculation formula and a second calculation formula. Compared with the prior art, the method has the advantages that the mean value of the curvature radiuses of the rear surface is calculated by calculating the mean value of the curvature radiuses of the multiple points, so that the accuracy of calculation of the curvature radiuses of the rear surface is improved.

Description

technical field [0001] The invention relates to the technical field of calculation of the average value of the IOL posterior surface after corneal refractive surgery, in particular to a calculation system for the average value of the IOL posterior surface after corneal refractive surgery. Background technique [0002] Corneal refractive surgery is a method of correcting nearsightedness, hyperopia, and astigmatism. According to international standards, according to the site of surgery, it can be divided into 13 types in three categories: corneal surgery, lens surgery and scleral surgery. [0003] However, multiple IOL degrees are required for calculation after corneal refractive surgery. There are many factors affecting the calculation process of IOL degrees, among which the corneal curvature has a greater impact. The accuracy of corneal curvature calculation directly affects the accuracy of IOL degree calculation. The parameters that have a greater impact on the calculation...

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Problems solved by technology

[0003] However, multiple IOL degrees are required for calculation after corneal refractive surgery. There are many factors affecting the calculation process of IOL degrees, among which the corneal curvature has a greater impact. The accuracy of corneal curvature calculation directly affects the accuracy of IOL degree calculation. The parameters that have a greater impact on the calculation of corneal curvature are the radius of curvature of the anterior surface and the radius of curvature of the posterior surface. Since the radius of curvature of the posterior surface is inconvenient to measure, the value of the radius of curvature of the posterior surface is calculated by the curvature formula. However, the current traditional The calculation method is to carry out the calculation with one point, so the value of the radius of curvature of the back surface obtained is not accurate, and the error is large

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