A Closed Moving Lens Retinoscopy Mirror

Abstract

The invention relates to a closed mobile lens retinoscopy mirror, which includes a casing, and an illumination system and an observation system arranged in the casing. A mirror hole and a working mirror are arranged on the left side of the casing, and a scale is arranged on the front side along its horizontal direction. The lighting system includes a half-mirror on the same lighting optical axis, a shading plate, a hyperbolic cylindrical mirror and a hyperbolic convex lens, and also includes an adjustment device and a power supply device for supplying power to the light source. The first adjustment mechanism and the second adjustment mechanism for adjusting the rotation of the base; the observation system includes a pointer, a bottom plate and a neutralization lens with refractive power, and a third adjustment mechanism for adjusting the sliding of the neutralization lens. The enclosed movable lens retinoscope provided in the above technical solution can effectively solve the problems existing in the prior art that there is spherical aberration in the outgoing light of the focusing lens of the retinoscope, and that the retinoscopy optometry must be performed in a darkroom environment and the retinoscopy optometry Issues that require the use of insert boxes.

Description

technical field [0001] The invention relates to the technical field of retinoscopy mirrors, in particular to a closed moving lens retinoscopy mirror. Background technique [0002] Retinoscopy is a method for objectively testing the refractive state of the eyeball. The basic principle of retinoscopy is that the examiner illuminates the retina of the examinee with a beam of light, and observes the convergence / divergence of the light reflected by the retina. , the refractive state of the subject's eye can be determined. At present, the commonly used device for retinoscopy optometry is a strip light retinoscope. In general, ophthalmic optical instruments, including retinoscopy mirrors, usually include two major systems, namely, an illumination system and an observation system. The illumination system is used to illuminate or display the structure of the examinee's eye that the examiner needs to observe in other ways, and the observation system is used for the examiner to obser...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a closed type mobile lens retinoscope, which can effectively solve the spherical aberration of the outgoing light of the retinoscope focusing mirror existing in the prior art, the use of the retinoscope optometry must be done in a darkroom environment, and the The problem of needing to use the insertion box for shadow optometry

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