Subjective and accurate binocular optometry device and optometry method

Abstract

The invention discloses a subjective and accurate binocular optometry device and optometry method. The device comprises a left eye light path and a right eye light path, wherein structures of the lefteye light path and the right eye light path are left and right completely symmetric structures; the left eye light path comprises a first lens, a second lens, a beam splitter, a reflecting mirror, awavefront corrector, a sighting mark objective lens, a wavefront controller and a sighting mark display device, wherein the first lens, the second lens, the beam splitter, the reflecting mirror, the sighting mark objective lens and the sighting mark display device are distributed sequentially, the wavefront controller is connected with the wavefront corrector, and the wavefront corrector is in butt joint with the beam splitter. The device has the benefits as follows: continuous compensation of defocusing and astigmatism amounts of human eyes can be realized through the single device, namely, the wavefront controller, and continuous subjective optometry can be performed; the defocusing amount, the astigmatism amount and the axial direction of the human eyes can be continuously adjusted, subjective, continuous and accurate binocular optometry can be realized, and accurate binocular optometry is realized. The system is simplified and the structure is simple.

Description

technical field [0001] The invention relates to the technical field of optical measurement, in particular to a binocular subjective accurate optometry device and optometry method. Background technique [0002] Currently, myopia has become a very common problem all over the world. According to the statistics given by the World Health Organization in 2010, the cause of visual impairment is refractive error, accounting for about 42%, and more than 90% of refractive error is myopia, so the world ranks The number one cause of visual impairment is myopia. For myopia, whether it is a pair of suitable glasses or refractive surgery, the key lies in accurate optometry and the best corrective prescription. [0003] At present, optometry methods include two categories: objective optometry and subjective optometry. Objective optometry is a method to determine the refractive state by measuring the position of the object's fundus or cornea reflected by light, mainly including retinoscop...

AI Technical Summary

Problems solved by technology

However, the existing trial frame inserts or comprehensive refractometers use discrete power (step size 0.25D) trial lenses for subjective refraction, and there are rounding errors, which cannot achieve continuous and accurate refraction of human eyes.

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