Human eye Hartmann contrast sensitivity measuring instrument

Abstract

The invention provides a human eye Hartmann contrast sensitivity measuring instrument, which consists of a light source, a pre-compensation mechanism, a light beam matching system, a pore diameter cutting element, a photoelectric detector, a grating display system, a computer system and a human eye bracket, wherein the pore diameter cutting element and the photoelectric detector constitute a Hartmann wave-front sensor; the pre-compensation mechanism can be used for correcting the lower order aberration of eyes; and the computer system is used for testing the contrast sensitivity and recording and analyzing a test result. When human eyes are subjected to contrast sensitivity test through an observation test object generating system, the Hartmann sensor can be used for measuring the aberration of the human eyes simultaneously, and a human eye optical system contrast sensitivity curve is obtained, so that contrast sensitivity curves of a human eye dioptric system and a nerve system are obtained simultaneously, a visual system is evaluated segmentally, quantitative preoperative prediction is performed on the visual function after ophthalmologic operation, and bases are provided for early discovery and in-time treatment of various ophthalmologic diseases.

Description

technical field [0001] The invention relates to a measuring instrument for the visual function of the human eye, in particular to a measuring instrument for the contrast sensitivity of the refractive system and the nervous system of the human eye. Background technique [0002] Eyes are the windows to the soul, and more than 85% of the information people get from the outside world comes from vision. At present, the conventional method for human visual function inspection is the traditional eye chart (that is, the international standard eye chart), which can only check the minimum resolution under high contrast, but cannot check the visual resolution ability under low contrast. The actual vision of the human eye is very complicated. Although the central vision of some eye diseases is still good, the contrast sensitivity has been reduced. Therefore, it is particularly important to combine the contrast sensitivity test with the visual acuity (eye aberration) test in the visual f...

AI Technical Summary

Problems solved by technology

At present, the conventional method for human visual function inspection is the traditional eye chart (that is, the international standard eye chart), which can only check the minimum resolution under high contrast, but cannot check the visual resolution ability under low contrast.

The actual vision of the human eye is very complicated. Although the central vision of some eye diseases is still good, the contrast sensitivity has been reduced. Therefore, it is particularly important to combine the contrast sensitivity test with the visual acuity (human eye aberration) test in the visual function test.

At present, the common contrast sensitivity test is either subjective, that is, the subject directly interprets the visual mark to complete the contrast sensitivity test, and the result includes both the influence of the human eye's refractive system and the influence of the nerve transmission part. According to the test results, directly judge the parts that affect vision or which is more important; or test the contrast sensitivity of the nervous system alone, if you want to comprehensively evaluate the refractive system and nervous system of the human eye, such test data will appear powerless

[0003] The Chinese patent application (Application No. 201010121408.6) titled "Automatic Defocus Compensation Human Eye Aberration Hartmann Measuring Instrument" discloses a measuring device that automatically compensates the defocus of the eye by moving guide rails. The structure of the device is relatively Complicated and unable to compensate for eye astigmatism

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