My anti-myopia coursebook

I have a very good book called the anti-myopia coursebook. It was given to me by my aunt, and gave me a lot!

On the cover of it is a picture, the whole picture is blue, is a bridge in Neijiang. There are two buildings on the bridge, standing tall on the bridge, about 20 stories high, the tallest two houses on the bridge. There are many small houses next to it, and the small houses are only about five or six stories. There are several piers in this bridge. The piers of the bridge are in the shape of an inverted triangle with many rectangular gaps in the middle. There is a cluster of leaves in the lower left corner, which is ambiguous. On the top of the picture, the words "Sichuan Province, China's small student class booklet" are the words of the ant-sized red. Below the figure, there is a big word written in grass. What is it written in the book, such as: mathematics, small textbooks, spelling books, etc., is also red. Below, it is the class, student, student number, teacher, school and year, month, day, or red. The front of the cover also reads the principle of "anti-myopia classbook": the human eye feels the font by the contrast between the brightness and chromaticity of the paper and the font. The white paper has a high reflectivity and consumes a large amount of energy in the retina; the reflection frequency of white light is almost constant, and regardless of the length of the line of sight, the ciliary muscle is forced to be in an excessively contracted state, causing the visual focus to move forward, increasing visual fatigue; white light It can only cause the weakest color vision response, which will reduce the visual ability. Therefore, writing on white paper for a long time is easy to cause myopia, which is red.

"Anti-myopia coursebook" reflects the specific spectral color of light by changing the optical performance of the paper, creating a safe and comfortable visual environment, so that the two visual functions of the photosensitive color can be fully utilized at the same time, effectively reducing visual fatigue and enhancing visual ability. It has the outstanding advantages of protecting eyesight, preventing myopia, and promoting the normal return of pseudo-myopia to prevent true myopia from deepening.

Unexpectedly, a small book also has a big role in protecting eyesight.

Sixth grade: Qiu Qiqi