1. The eye is able to distinguish between 130-250 clear tones and 510 million mixed shades.
  2. Men are about 10 times more likely to be colorblind than women. They are less sensitive to shades of red. Where a woman sees five to eight different shades, a man sees one – the main color.
  3. Women blink approximately twice as often as men.
  4. Neither man nor woman can sneeze with open eyes. About 2% of road accidents in the world occur as a result of sneezing behind the wheel.
  5. The phenomenon in which a person loses the ability to see due to strong light is called “snow blindness”. It often affects people living in the polar regions. It is known that even the most primitive Eskimos in their daily outfit have goggles to protect their eyes from the sun.
  6. The pigeon has a field of view of 340 degrees. The human eye has 160 to 175 degrees. The cat has 185 degrees, and the dog and the wolf – 30-40 degrees.
  7. The eyes of a person who works with a computer refocus from the screen to the paper or to the keyboard about 20 thousand times a day.
  8. Bees recognize almost the same color range as humans. They are less sensitive to red, but more sensitive to purple. In addition, bees can distinguish between polarized and not-polarized light. Humans cannot.
  9. The complete adaptation of the eyes takes about 60 to 80 minutes. After a minute in the dark, the eyes adapt to light 10 times harder. Therefore, you can become blind if going out in bright light after a long stay in the dark.