What Is Color Vision?

Color weakness is also called "abnormal three-color vision." Color visual defects. Mild color blindness that recognizes color but has less sensitivity. Patients with weak color have poor ability to distinguish colors, and can only see colors when the colors are saturated; they can distinguish the changes in hue only when the wavelengths are greatly different. The more common are weak red (type A) and weak green (type B). Blue weak is extremely rare. Red blindness has poor discrimination against red; green blindness has poor discrimination against green. Patients with color weakness are mostly men. ^[1]

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Color weakness is also called "abnormal three-color vision." Color visual defects. Mild color blindness that recognizes color but has less sensitivity. Patients with weak color have poor ability to distinguish colors, and can only see colors when the colors are saturated; they can only be distinguished when there is a large difference in wavelength

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How to determine color blindness and color weakness? Most of the color blindness and color weakness inspections are subjective inspections, which are generally performed under brighter natural light. The common inspection methods are as follows.

False homochromatic

Usually called a color-blind book, it uses dots of the same shade and different colors to form numbers or graphics, and reads them at a distance of 0.5m under natural light. The color blindness should be squared up during the inspection, and each picture should not exceed 5 seconds. People with color vision impairment are difficult to recognize, misread or cannot read, they can be identified according to the color blindness table

An effective way to correct color blindness and color weakness.

People are weak, and cattle are also weak.

Color weakness (social bias)

Color weakness is a prejudicial name for people with abnormal color vision. The ability to distinguish colors includes identifying the hue and saturation of the color. The person with abnormal color vision has a regular look at the color. It feels that it will change tomorrow. His color reaction to things is objective. At present, those who have abnormal color vision measured by color discrimination charts only find that they are different from normal people in visual physiology. The so-called color cast phenomenon occurs, but he It is objective to this phenomenon.

Normal people and color vision people s understanding of color is normal and reflects the actual situation of things; for example, we normal people see two color blocks of the same color under fluorescent lights, because they are made of different dyes The chromatograms of the visible light segment do not overlap, but they are not found by normal people. When using incandescent light, normal people will find that there is a color difference between these two color blocks.

Because normal people are preconceived, they must use what they see under fluorescent lights to see what the visually abnormal people see. That is not an objective requirement, because people with abnormal color vision see only phenomena that normal people do not find.

The law of color vision abnormality can be solved through color training and the use of instruments. As long as normal people communicate with color vision abnormalities and understand them more, everyone will find a more accurate objective world.

The colors in our society (such as books, paints, clothes, etc.) are all simulated colors. The simulation methods and formulas are different. It is unscientific to require people with abnormal color vision to have the same view as normal people. Moreover, our country has % Of people with abnormal color vision.