Eyesight protective device

Abstract

The invention provides an eyesight protective device. The eyesight protective device comprises a distance measuring module, a single chip microcomputer, a distance display module and a power supply, wherein the distance measuring module and the distance display module are connected with the single chip microcomputer respectively; the distance measuring module and the distance display module are connected with the power supply respectively. The eyesight protective device has the three functions of light measuring, distance measuring and metering, can be used for automatically promoting if a user writes closely, measuring the illumination intensity of the writing or reading environment of the user, and enabling the user to properly rest and adjust after writing or reading for a long time under the time prompting, is various in function and capable of effectively solving the eyesight problem of the teenager.

Description

technical field [0001] In particular, the invention relates to a vision protection device. Background technique [0002] At present, according to the analysis report of the visual acuity census, the myopia rate of primary and middle school students across the country is getting higher and higher, and the rate of poor vision is on the rise with the increase of grades. For this status quo, people have also begun to pay attention to vision problems. [0003] For primary and middle school students, there are mainly the following five reasons for myopia. First, if the eye distance is too close, the eyes of teenagers have a strong ability to adjust. When the distance between the book and the eyes reaches 7-10 cm, they can still see objects clearly, but if they often read and write at this distance, the adjustment of the eyes will be abnormal. Tension, which can form inflection (accommodative) myopia, that is, pseudomyopia. If the long-term excessive adjustment makes the ciliary...

AI Technical Summary

Problems solved by technology

Second, the time spent using eyes is too long. Many teenagers read, write, do homework, watch TV, etc. without rest for 3-4 hours in a row, and even go to bed late at night. This not only affects the health of the body, but also overloads the eyes. The internal and external muscles are in a state of tension for a long time without rest. Over time, when looking at a distance, the muscles of the eyes cannot relax and are in a state of spasm, so that the distance is blurred and myopia is formed

The third lighting light is too strong or too weak. If the light is too strong, such as sunlight shining on writing, etc., it will cause strong reflection, irritate the eyes, make the eyes uncomfortable, and make it difficult to see the characters. On the contrary, if the light is too weak, the written lighting is insufficient and the eyes cannot be clear If you can see the characters clearly, your head will move forward and get closer to the book. The above two situations can make the eyes easy to fatigue, excessive adjustment or spasm of the eyes, resulting in myopia

The fourth desk does not meet the requirements, and the writing posture is not correct. If the desk and chair are too low, the head is tilted forward, the spine is bent, the chest is compressed, and the eye adjustment is relatively tense, or the desk and chair are too high, the feet are suspended, and the lower limbs are easy to swing. Keeping the correct posture can make the eyes tired and prone to myopia over time

[0004] In response to these causes of myopia in young people, there are many vision protection products on the market, but most of them are mechanical and have single functions.

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