The eyes are the windows of the soul, and one of the most important organs of our humanity. So how much do we know about the eyes? Today we will list 20 interesting knowledge points about the eyes.

1. Do you know when the Eyes start evolving? Scientists estimate that eye first evolved 500 million years ago, and the original eye is in a very simple form that could probably only distinguish light from dark.
2. What is the most common color of our eyes? The most common eye color is brown eye contact. There is around 55% of the population is brown eyes, so it remains the most common color. We all know that Eye color is determined by genetics, depending on they dictate how much melanin is produced in your iris.
3. The cornea is a transparent covering of the iris and pupil. It protects your eyes from dirt and bacteria, and the sun’s ultraviolet rays. If your cornea is damaged, your vision will be affected due to the light entering your eyes will be disturbed

4.20 / 20 vision only means that your vision is normal. Contrary to popular belief, having a 20/20 vision is nothing. On the contrary, this means that you can read a chart 20 feet away under normal lighting conditions.

5. Studies have indicated that pregnant women have worse vision. When hormones are rampant and the body changes, women may experience vision problems. These are usually mild and temporary conditions, such as blurred vision and dry eyes, which will disappear once the child is born.
6. When reading or staring at the computer for a long time, your eyes will become tired. This is because you do not blink often, and you do not relax the muscles in your eyes. If you often encounter this situation, you should make sure that your eyes are properly rested.
7. Smokers almost double the danger of developing dry eye syndrome. It is well known that tobacco smoke can irritate the eyes-even secondhand smoke exposure can make dry eye worse, especially for contact lens wearers.
8. Excessive sun rays can cause eye damage. Exposure to ultraviolet light can cause eye diseases such as cataracts and pterygium. To protect your eyes from the sun, you should wear suitable sunglasses, preferably wrap-around sunglasses.
9. The fingerprint has 40 unique features, and the iris has 256. This is why retinal scans are increasingly used for safety purposes. Retina scanners use infrared light to map unique blood vessel patterns on the human retina. This model is so complicated that even identical twins will not have the same configuration.
10. Tears help protect our eyes from infection. Any dust that can pass through the defense of our eyelashes and eyebrows will be washed away by tears. They keep our eyes clean, moist, and full of antibodies against infection.
11. Some colors are too complex to be recognized by the human eye. These are called “impossible colors” and cannot be perceived because they exceed the strength of the three-cone cells in our retina. However, you can see some of these colors by mixing the color signals of the two eyes or viewing a special “fatigue template.”.
12. Eye makeup has a certain period of use. You should preferably discard eye makeup after three months. Creamy or liquid eye makeup such as mascara is an ideal breeding ground for bacteria, which may cause eye infections.
13. You should never share eye makeup with your friends. Swapping eye makeup can cause nasty infections. This is because the makeup device can easily carry bacteria, and you do not want to exchange bacteria with others.
14. Astigmatism refers to a curvature of the cornea or lens. It is common and usually not a serious problem. It causes distorted vision and toric lenses are prescribed to aid the individual’s sight.
15. Do you know how many times you blink on average every year? According to relevant research, humans blink an average of 4,200,000 times per year. The purpose of blinking is to lubricate the eyes. Adults blink 15 to 20 times per minute, the researchers say it is enough to keep their eyes moist.
16. Approximately 99% of the world’s population needs reading glasses between the ages of 43 and 50. As we age, the lenses in our eyes will gradually lose focus. This means that most of us will need some form of vision correction in adulthood.
17. We cannot directly clean contact lenses with water. , Wash contact lenses directly with water. This may cause serious eye infections. We need to use a special care solution for cleaning, which can be easily purchased.
18. The human eye can only see three colors. The retina has three types of cone cells. One is sensitive to red, one is sensitive to blue, and the other is sensitive to green. These three cone cells work together to perceive the combination of light waves, which helps us see millions of other colors and shadows.
19. People with blue eyes have the same ancestry. At first, everyone’s eyes were brown until a genetic mutation occurred between 6,000 and 10,000 years ago. Every blue-eyed person has a very distant relative.
20. The male and female brains handle colors slightly differently. Research shows that the colors seen by men and women are slightly different. Androgen testosterone may affect the way the male brain processes the information absorbed by the eye. However, the difference is only small.

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