An Adaptive Optics Micro Perimeter

Abstract

An adaptive optics microperimetry, infrared beacon emits infrared light to the pupil of the subject, the Hartmann wavefront sensor measures the wavefront aberration of the human eye carried by the reflected light of the fundus, and the computer calculates the control voltage based on the measured aberration , driving the wavefront corrector to correct the aberration of the human eye. After the aberration correction is completed, the fixed optotype for fixing the line of sight of the examinee and the optical stimulation optotype for providing optical stimulation to the fundus of the examinee are displayed at a plurality of predetermined positions on the stimulus optotype display device. The pupil camera uses the infrared light emitted by the infrared light source in front of the eye to capture the subject's human eye pupil image and calculate the pupil diameter. The computer controls the change of the optical stimulus visual target according to the change of the subject's pupil diameter, and measures the subject's field of vision. The invention has high reliability, reduces the stimulus redundancy caused by the aberration of the human eye in the visual field test, is beneficial to discover early micro-perspective defects, and provides a powerful tool for the evaluation of the micro-perspective defects of the human eye and the diagnosis of related diseases.

Description

technical field [0001] The invention relates to an adaptive optical microperimeter, which is an optical instrument for precise and objective measurement of early microperimetry defects of human eyes without relying on the subject's subjective judgment. Background technique [0002] Perimeter, as a widely used main visual function test method, provides important information for the diagnosis and monitoring of glaucoma and some other visual and optic nerve diseases, and creates conditions for successful treatment. The traditional perimetry checks the visual field of the subject by displaying the optical stimulus target (eye_target) at a specific position in front of the subject's eyes, asking the subject whether he sees the target, and changing the optical stimulus target (change amount) according to the answer. It can be the brightness, size, shape, etc. of the visual target), and continue to ask the subject until the optical stimulation target reaches the visual threshold of...

AI Technical Summary

Problems solved by technology

However, the stimulus optotype of this perimetry still uses the traditional optical path projection, without considering the impact of stimulus redundancy on the examination results, it is difficult to effectively diagnose early subtle visual field defects

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