Method and system for acquiring lens curvature and diopter based on IOLMaster image

Abstract

The invention relates to a lens curvature and diopter acquisition method and system based on an IOLMaster image. The system is used for executing the following method: acquiring a cornea front surface curvature radius and a lens thickness valuea lens, corresponding lens morphology picture; acquiring cornea anterior surface pixels, crystalline lens anterior surface pixels, crystalline lens rear surface pixels; and outputting the curvature radius value of the front surface of the crystalline lens and the curvature radius value of the rear surface of the crystalline lens, the ratio of the curvature radius of the front surface of the cornea to the curvature radius of the front surface of the crystalline lens is equal to the ratio of the pixel of the front surface of the cornea to the pixel of the front surface of the crystalline lens, and the ratio of the curvature radius of the front surface of the cornea to the curvature radius of the rear surface of the crystalline lens is equal to the ratio of the pixel of the front surface of the cornea to the pixel of the rear surface of the crystalline lens; and outputting the lens front and rear surface refractive power and the lens total refractive power; according to the method, crystalline lens parameters can be visually obtained based on an IOLMaster image, and the high efficiency of corresponding research is greatly improved.

Description

technical field [0001] The invention relates to a method and system for calculating lens parameters based on IOLMaster images and a computer program product configured to implement the method. Background technique [0002] The lens is a biconvex transparent tissue, which is fixed and suspended behind the iris and before the vitreous body by suspensory ligaments. It is one of the important refractive media in the eyeball. The focal point of the eyeball can accurately fall on the retina when looking far or near. The change of its diopter is valuable for analyzing the change of the eye's refraction and its development trend. Especially in the development of myopia, the influence of the change of lens shape on myopia is also a topic worth studying. However, there is currently no instrument that can directly measure the changes in the curvature and diopter of the lens. Therefore, using the existing detection technology, combined with computer computing technology and optical pri...

AI Technical Summary

Problems solved by technology

[0003] The IOLMaster ocular biometric instrument is an optical biometric instrument using non-contact technology to accurately measure the patient's eye axial length, corneal curvature and anterior chamber depth; it innovatively solves the problem of accurately measuring ocular biological parameters and preparing implants before cataract surgery. IOLMaster 700 is a high-precision instrument based on the measurement principle of optical coherence tomography, with a center wavelength of 1055mm, and can scan from 6 angles, which can clearly display the front and back of the cornea. Surface shape curve, thickness, lens front and rear surface shape curve, thickness and other parameters; IOLMaster 700 can image the whole lens, and has been able to directly measure the value of the curvature of the cornea and the thickness of the lens, but cannot obtain the radius of curvature of the front and rear surfaces of the lens ; The measurement of the curvature of the front and rear surfaces of the lens is still a difficult problem

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