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

A technology for calculating the system and average value, which is applied in medical science, eye testing equipment, diagnosis, etc., can solve problems such as large influence, large error, inaccurate radius of curvature of the back surface, etc., and achieve the effect of improving accuracy

Pending Publication Date: 2021-06-25
福建眼界科技有限公司
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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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  • Calculating system for IOL rear surface average value after corneal refraction operation

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Embodiment Construction

[0012] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0013] The system for calculating the average value of the IOL posterior surface after corneal refractive surgery includes a calculation origin selection module and a calculation module, and the calculation origin selection module includes the corneal apex and the center point of the pupil, and the corneal apex corresponds to the curvature average value and range within the range one The mean value of curvature in two and the mean value of curvature in range three, the pupil center point corresponds to the mean value of curvature on ring one, the mean value of curvature on ring two and the mean value of curvature on ring three, and the calculation module includes Calculation formula one and calculation formula two.

[0014] For eyes after RK, use the center of the pupil as the origin of calculation and correspond to formula 1. For eyes after Lasik, use the co...

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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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/107
CPCA61B3/107
Inventor 叶向彧苏庆灿张嵘胡颖峰王艳王峥曾义榕王云海刘明盛
Owner 福建眼界科技有限公司
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