Two-in-one visual acuity chart light box

Abstract

The present invention relates to the field of medical devices, in particular to a two-in-one eye chart light box, which includes a box body, a transmission shaft, a motor, an eye chart, a travel switch, a remote controller, a light-emitting board, a control unit and a receiving unit. The transmission shaft is connected to the top of the box, and the vision chart is wound on the transmission shaft; the travel switch is electrically connected to the control unit; the receiving unit is used to receive the signal from the remote control, and the control unit controls the light-emitting panel and motor. The box is also provided with a light guide plate and reflective paper, the eye chart is sandwiched between the light guide plate and the front panel of the box, and the luminescent plate is sandwiched between the light guide plate and the reflective paper; the box is also equipped with an electromagnetic Iron, the electromagnet is electrically connected with the control unit, and the eye chart is provided with a magnetic piece used in conjunction with the electromagnet. The invention realizes the switching of different eye charts by controlling the transmission shaft through the remote controller, and can adjust the luminous intensity of the light box to meet the needs of patients, thereby improving the accuracy of visual inspection.

Description

【Technical field】 [0001] The invention relates to the field of medical equipment, in particular to a two-in-one eye chart light box. 【Background technique】 [0002] Regular visual acuity testing is the most important and effective means for early detection of eye diseases in children, because vision loss caused by eye diseases or systemic diseases is often not noticed by children or parents, especially when the vision declines slowly. Or monocular visual acuity is more difficult to find, so regular visual inspection is the easiest and most convenient way for early detection, early treatment and prevention of the occurrence and development of children's eye diseases. In pediatrics, children's vision charts are usually used for visual inspection of younger children. In actual work, children's vision charts and normal vision charts are often installed on the front and rear sides of the light box, and children use the children's vision charts on the front side for testing. Afte...

AI Technical Summary

Problems solved by technology

In pediatrics, children's vision charts are usually used for visual inspection of younger children. In actual work, children's vision charts and normal vision charts are often installed on the front and rear sides of the light box, and children use the children's vision charts on the front side for testing. After finishing, you have to go to the back side to use the normal vision chart for testing. This kind of vision chart requires a wide enough space and is inconvenient to use

Due to the great difference in the recognition of light by children's eyes, the brightness of the light box cannot be adjusted at present, resulting in errors between the measured vision and the actual situation.

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