Optical coherence based human eye measurement device and optical coherence based human eye measurement method

Abstract

The invention discloses an optical coherence based human eye measurement device and an optical coherence based human eye measurement method and relates to the technical field of human eye measurement devices and human eye measurement methods. The optical coherence based human eye measurement device comprises a low-coherence light interference unit, a quick zooming unit, a multi-reference-arm unit, a photoelectric triggering unit, a servo motor, a turn table and a computer, wherein the low-coherence light interference unit is in light connection with the quick zooming unit through a second optical fiber and is in light connection with the multi-reference-arm unit through a third optical fiber, the computer is electrically connected with the low-coherence light interference unit and the photoelectric triggering unit through a first signal line and a second signal line respectively, two paths of light outputted by the low-coherence light interference unit enter the quick zooming unit and the multi-reference-arm unit respectively, and the servo motor drives the turn table to rotate so as to zoom light outputted by the low-coherence light interference unit and switch optical paths. The optical coherence based human eye measurement device is capable of accurately measuring related parameters including corneal thickness, anterior chamber depth, crystalline lens thickness and vitreous body thickness of optical axes of human eyes.

Description

technical field [0001] The invention relates to the technical field of human eye measuring devices and methods, in particular to an optical coherent human eye measuring device and a human eye measuring method. Background technique [0002] Cataract is one of the common blinding ophthalmic diseases. Patients with blurred vision in the early stage of the disease, and gradually lose vision due to clouding of the lens in the later stage. Currently, there is no cure for cataracts. The only effective way is to remove the cloudy lens through surgery and implant an intraocular lens. Whether the diopter of the intraocular lens is suitable will determine the recovery of postoperative vision, and the diopter of the intraocular lens depends on the visual axis parameters of the eye Decisions such as: corneal thickness, anterior chamber depth, visual axis length, etc. This type of operation requires accurate measurement of the parameters related to the visual axis of the patient before t...

AI Technical Summary

Problems solved by technology

For the detection of boresight parameters, the above three methods are all based on the principle of time-domain low-coherence light interference, and their own sensitivity is relatively low; and, because in the detection process of the time-domain low-coherence light , so the optical path difference between the probe light and the reference light changes continuously, and the detected interference spectrum signal changes continuously, and it is impossible to achieve multiple averages to improve the signal-to-noise ratio and sensitivity; in addition, these methods do not take into account the tested Due to the lack of fast zooming due to the visual condition of the patient, during the detection process, it is impossible to ensure that the detection light can be focused on each detection surface in the eye in sequence

Therefore, for those patients with severe lens opacity, the serious attenuation of the detection light will cause the light returned to the detector to be too weak, so that the visual axis parameters cannot be effectively detected, resulting in a low detection rate

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