A pixel is composed of small squares in an image. These small squares have a clear position and an assigned color value. The color and position of the small squares determine the appearance of the image.
We can understand a pixel as the smallest unit of an image. These pixels are arranged and combined in an orderly manner to form the final image we see. Like a dense puzzle, pixels determine the size of the image when it is presented.
There is a close relationship between pixels and imaging. When we use electronic products such as cameras to take pictures, we must never have imagined that human eyes also have super high pixels.
The human eye is a light-responsive, multi-purpose organ and a very important organ of the human body. As a sensory organ of consciousness, the eye has vision, and the rod cells and cone cells in the retina have the functions of light perception and vision, including color differentiation and depth perception.
It was previously pointed out that the number of light-sensitive cone cells in the human retina is about 6 million. By comparing the number to the pixels of the human eye, it was found that the human eye is equivalent to a camera with a pixel value of 6 million. In fact, the pixels of human eyes are much higher than 5 million.
If calculated according to the 10 million pixels of an ordinary SLR camera, the human eye can be equivalent to more than 50 SLRs stuffed into it at one time.
The human eye can distinguish about 10 million colors, and the human eye is effectively like a 576-megapixel super camera.
In common with other mammalian eyes, the non-imaging photosensitive ganglion cells of the human eye influence and adjust pupil size by receiving light signals in the retina, the hormone melatonin, and circadian clock-induced programming and inhibition .
The eye is a very delicate organ and if damaged it cannot be repaired, so take good care of it.
ways to protect your eyes
1. Prevent trauma
No matter in work or in life, eyes are always vulnerable to injury. External factors such as light source and temperature can damage eyes, so some measures should be taken to protect eyes.
2. Prevent eye diseases
The occurrence of eye disease is caused by many reasons. If it is not treated in time, vision will gradually decline, and may eventually lead to blindness.
3. Improve bad habits and unreasonable treatment methods
Bad work and living habits can also have a bad effect on the eyes. For example, living and studying under strong and low light, the eyes are prone to loss of vision. If there are other bad habits, the damage to the eyes will be greater.
4. Pay attention to nutrition
Malnutrition will lead to discomfort and vision loss. The cause of vision problems is not a rare cause, but vitamin A deficiency. In order to protect the eyes, the habit of partial eclipse must be changed.
5. Pay attention to the time and posture of eye use
Many people are very focused when using computers and mobile phones, and the number of blinks is significantly reduced. After a long time, tears evaporate too quickly, and the metabolism of tears is delayed, which is easy to cause dry eye syndrome. When studying and working, you must correct your posture.
6. Do eye exercises frequently.
Eye exercises can adjust blood circulation in the eyes and head, regulate muscles, improve eye fatigue, and prevent eye diseases such as myopia.
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