A Refractive Topography Measuring Instrument

Abstract

The present invention proposes a refraction topography measuring instrument, which comprises an eyepiece, an annular reflector, an aperture module, a focusing module, an imaging module, an image receiver, and an annular lighting module arranged in sequence from front to back. The annular reflector is arranged in a hollow ring, and the mirror surface of the annular reflector is inclined to one side. The annular lighting module is used to emit annular illumination light to the annular reflector, and the annular reflector will The emitted light is reflected to the eyepiece, and is incident from the eyepiece to the eyeball, and the detected reflected light reflected by the eyeball is transmitted from the eyepiece, the central hole of the annular emitting mirror, and the aperture module. The aperture of the aperture, the focusing module is transmitted to the imaging module, and after passing through the imaging module, it is transmitted to the Zhuoshu image receiver, and the aperture of the aperture module is set to an adjustable setting In this way, through a simple technical solution, the measurement of the change of the diopter of the human eye under different pupil sizes is realized.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a refraction topography measuring instrument. Background technique [0002] The diopter of the central field of view of the human eye is one of the most important parameters for the evaluation of human vision. Most of the existing visual acuity measurement equipment is mainly based on the refraction measurement of the central field of view of the human eye. Studies have shown that the diopter of the peripheral field of view will affect the development trend of human vision. Therefore, there is a need for an instrument that can simultaneously measure the diopters of the peripheral and central visual fields. A map of the distribution of refraction in the peripheral and central fields of view is called a refraction topography, and an instrument that measures the distribution of refraction in the central and peripheral fields of view is called a refraction topographer. ...

AI Technical Summary

Problems solved by technology

[0003] However, it is difficult for the existing refraction topographer to measure the change of the diopter of the human eye under different pupil sizes. Detection, of course, there are also some refraction topographers that can detect human eyes with different pupil sizes, but the technical solutions are more complicated

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