A method and device for measuring distance between multiple interfaces of eyes

Abstract

The invention discloses a method and device for measuring the multi-interface distance of the eye. The method includes: dividing short coherent light into two paths, one path entering the fast zoom system 1 as detection light, and the fast zoom system 1 switches three light paths to measure the eyes respectively. The front and back surfaces of the cornea, the front and back surfaces of the lens and the retinal surface are used as reference light to enter the multi-optical path reference system 2 to perform corresponding reference light optical path compensation to achieve continuous control of the front and back surfaces of the cornea, the front and back surfaces of the lens and the retinal surface. Detection: record the interference spectrum information of the front and back surfaces of the cornea, the front and back surfaces of the lens and the surface of the retina, and perform FFT transformation on the spectral information to obtain the front surface of the cornea, the back surface of the cornea, the front surface of the lens, and the back surface of the lens. and the relative positions L5, L4, L3, L2, and L1 between the retinal surface. The present invention achieves accurate corneal thickness, anterior chamber depth, lens thickness, and visual axis length.

Description

technical field [0001] The invention relates to a method and a device for measuring distances between multiple interfaces of an eye, belonging to the field of eye biological detection. Background technique [0002] Cataract is the most common blinding eye disease. It is a disease in which the lens loses transparency and becomes cloudy due to various factors. The incidence rate of cataract in my country is higher than 5%. Cataract leads to loss of vision, which seriously affects the vision and quality of life of patients. At present, there is no effective drug treatment plan for cataract, and surgery to remove the cloudy lens and implant an intraocular lens is still the only effective method. However, with the development of small incision phacoemulsification and folding intraocular lens surgery, the chance of postoperative complications has been greatly reduced, and the recovery of postoperative visual acuity has been accelerated. The operation has been transformed into th...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a method and device for measuring the distance between multiple interfaces of the eye, which can effectively solve the problems existing in the prior art, especially because the diopter of the human eye is different, the light will produce defocusing phenomenon in the retina, so that When only one optical path is used to locate the front and back surfaces of the retina, cornea and lens, focusing on the retina will affect the measurement of the front and back surfaces of the cornea and lens, resulting in the measured corneal thickness, anterior chamber depth, lens thickness and visual axis length The problem of low precision and impracticability for practical application

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