How does physical examination color weak do?

summary

Color weakness is also called "abnormal trichromatic vision". Color vision defect. Mild color blindness that can recognize color but has low sensitivity. The color discrimination ability of patients with color weakness is poor, and they can only see the color when the color is saturated; The change of hue can be distinguished only when there is a big difference in wavelength. The more common are red weak (type A) and green weak (type b), and blue weak is extremely rare. How does physical examination color weak do? Next, I'd like to share my views with you.

How does physical examination color weak do?

It is an effective way to correct color blindness. The principle of color blindness correction lens is that according to complementary color antagonism, a special coating is applied on the lens to produce the effect of cutoff wavelength, which can transmit to the long wavelength and reflect to the short wavelength. Wear color blind glasses, can make the original color blind picture book can not be identified correctly. To achieve the effect of correcting color vision disorders.

According to the theory of complementary color, the color blind and achromatic corrective lenses are designed and developed. It can be divided into contact lens type and common wide frame type. Both of them have remarkable effect on the correction of red and green blindness. Because of its good privacy, contact color blind glasses can protect the privacy of consumers, so they are suitable for physical examination and normal wear; Because of the special red coloring on the surface of the frame lens, the appearance of the product is obvious, which is relatively convenient for daily work or driving; The characteristics of the two are only for consumers' reference and their own choice.

Color weakness is a biased term for people with abnormal color vision; The ability to distinguish colors includes the hue and saturation of colors. People with abnormal color vision see colors regularly. They will not change the colors of the same wavelength curve because today is the feeling, and tomorrow will change. Their color response to things is objective; At present, people with abnormal color vision measured by color discrimination map only find the so-called color deviation phenomenon which is different from normal people in visual physiology, but they are objective about this phenomenon.

matters needing attention

There are many ways to improve and treat color blindness, and diet is also helpful to prevent and improve the symptoms of color blindness. Food containing vitamin A, food containing vitamin C, food containing calcium and chromium, alkaline food and food containing riboflavin can not only prevent and improve the symptoms of color blindness, but also help to improve eyesight.