Clamping device for an ophthalmic vision chart

Abstract

The invention relates to a clamping device, in particular to a clamping device for ophthalmology visual testing charts. According to the technical aim, the clamping device for the ophthalmology visualtesting chart can clamp the visual testing charts with different lengths and can adjust the positions and heights of the visual testing charts. In order to achieve the technical aim, the device comprises a base and the like; a supporting rod is connected to the top of the base, a stretching mechanism is connected to the upper side of the supporting rod, and a clamping mechanism is connected to the left side of the stretching mechanism. According to the clamping device for the ophthalmology visual testing chart, the effects are achieved that the visual testing charts with different lengths canbe clamped and the positions and heights of the visual testing charts can be adjusted, the distance between the left sides of second rotation rods on the upper side and the lower side is changed by rotating a first rotation rod so that the device can clamp the visual testing charts of different sizes, the visual testing charts can be clamped stably through springs, accordingly, the visual testingcharts can be used without the need of being pasted on the wall, and the visual testing charts can also be placed outdoors.

Description

technical field [0001] The invention relates to a clamping device, in particular to an ophthalmic eye chart clamping device. Background technique [0002] The full name of ophthalmology is "eye disease specialist", which is a discipline that studies diseases that occur in the visual system, including the eyeball and its associated tissues. Ophthalmology generally studies vitreous, retinal diseases, optometry, glaucoma and optic neuropathy, cataract and other ophthalmic diseases. [0003] An eye chart is a chart used to measure vision. The eye charts used in China include: international standard eye chart, logarithmic eye chart, and Langer's ring eye chart. Functionally, there are near vision chart and distance vision chart. The eye chart is formulated based on the principle of visual angle. Visual acuity checks are generally divided into two categories: distance vision and near vision. The distance vision mostly adopts the international standard eye chart, which is compo...

AI Technical Summary

Problems solved by technology

[0004] There are many types of eye charts in terms of function, some of which are different in size, and the existing eye charts are all pasted on the wall for people to test, and this is relatively simple and inflexible, and can It is impossible to test vision in places without walls, and most of the existing vision tests are indoors where there are walls. In this way, it is easy to cause indoor crowding among the many people who need to test vision, and a supportive support is required. The device of the eye chart, and the device of the eye chart can also be adjusted according to people of different heights

[0005] Therefore, there is an urgent need to develop an ophthalmic vision chart clamping device that can clamp vision charts of different lengths and adjust the position height of the vision chart to overcome the inability to clamp vision charts of different lengths and non-adjustable vision charts in the prior art. Disadvantages of location height

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