Vision testing device for medical ophthalmology

Abstract

The invention provides a vision testing device for medical ophthalmology. The vision testing device comprises a hollow cavity, a vent hole, a miniature fan, a button switch, a storage battery, a sponge pad, a velcro tape hair side belt, a velcro tape hook side belt and a rubber strip, wherein the hollow cavity is formed in a cap hoop, the vent hole is formed in an inner surface of the cap hoop, the miniature fan is assembled in an installation chamber, the button switch is arranged on an outer surface of the cap hoop, and the storage battery is assembled inside the cap hoop. The design increases an auxiliary ventilating function for the vision testing device provided by the invention, a limiting block is assembled on a right end surface of the rubber strip, the velcro tape hook side belt is assembled on a left end surface of the rubber strip, the velcro tape hair side belt is assembled on a right end surface of the sponge pad, and the velcro tape hair side belt and the velcro tape hook side belt are bonded with each other. The design achieves the purpose of rapidly disassembling and replacing the vision testing device provided by the invention, and the vision testing device provided by the invention is convenient to use, good in air permeability, good in stability and high in reliability.

Description

technical field [0001] The invention is a visual acuity testing device for medical ophthalmology, which belongs to the field of medical equipment. Background technique [0002] Vision refers to the ability to distinguish small or distant objects and small parts. The ability of the eye to recognize distant objects or targets is called far vision, and the ability to recognize nearby small objects or targets is called near vision. During health checks, it is mainly Check distance vision. Under certain conditions, the smaller the object the eyes can distinguish, the greater the visual acuity. The basic feature of vision is to distinguish the distance between two points. Vision can be divided into static vision, dynamic vision and night vision. , Static vision refers to the vision detected when both the person and the observed object are in a static state, and dynamic vision refers to the ability of the eyes to capture, decompose, and perceive the image of a moving target when ob...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, there are still many deficiencies in the vision testing device. Its function is single and its air permeability is insufficient. It is easy to cause discomfort to the patient due to poor ventilation. Replacement, easy to breed bacteria after long-term use, so there is an urgent need for a vision testing device for medical ophthalmology to solve the above problems

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