Eye multi-interface distance measuring method and eye multi-interface distance measuring device

Abstract

The invention discloses an eye multi-interface distance measuring method and an eye multi-interface distance measuring device. The method comprises the following steps of dividing short-coherence light into two channels; recording interference spectrum information of front and rear surfaces of a cornea, front and rear surfaces of a crystalline lens and a surface of a retina; and performing FFT (fast fourier transform) on the interference spectrum information to obtain opposite positions L5, L4, L3, L2 and L1 of the front surface of the cornea of an eye, the rear surface of the cornea, the front surface of the crystalline lens, the rear surface of the crystalline lens and the surface of the retina. One channel of short-coherence light serving as probe light enters a fast zooming system 1, three optical paths are switched over by the fast zooming system 1 and respectively measure the front and rear surfaces of the cornea of the eye, the front and rear surfaces of the crystalline lens and the surface of the retina, the other channel of short-coherence light serving as reference light enters a multi-optical-path reference system 2 to perform corresponding reference light optical path compensation, and the front and rear surfaces of the cornea, the front and rear surfaces of the crystalline lens and the surface of the retina can be detected continuously. By the eye multi-interface distance measuring method and the eye multi-interface distance measuring device, accurate cornea thickness, anterior chamber depth, crystalline lens thickness and visual axis length are obtained.

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...

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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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