Unexpected Fun Facts About Eyes--- I. Changing Eyes

The eye is the window to the world and the door to the soul. But how much do you know about it? Do you know how many eyes are there? Do you know that brown eyes can turn into blue eyes forever? You know that some colors do exist, but we can't see them? From today on, we'll give you 50 interesting and unexpected fun facts about eyes. We plan to finish the topic in five parts. OK, let's go to the first part--Changing Eye.

Changing Eyes

1. Humans The cornea is very similar to the shark, so the latter is often used as a replacement for the cornea in the human eye during surgery.

2. People and dogs are the only species that will make judgments in the other's eyes. Dogs do this when they communicate with humans.

3. Unless you are specially trained, you may not be able to sneeze with your eyes open.

4. Pirates wear gold earrings because they believe this will increase their vision.

5. In a television interview, an American prisoner of war in Vietnam repeatedly smashed the Morse code torture to hint at the US military's experience in Vietnam.

6. When looking at the person you like, the pupil of the person will expand by 45%.

7. All newborn babies are color blind. When the child is born and opened his eyes, their world is mainly composed of three colors: black, white and gray.

8. Scientists at the University of Copenhagen found that blue-eyed people have a common ancestor. The ancestors showed blue variations and lived between 50,000 and 10,000 years ago. Before that, everyone was brown eyes.

9. The human eye can distinguish between 500 different shades of gray.

10. There are approximately 107 million light-sensitive cells inside each eye.

11. One in every 12 men suffers from color blindness.

12. People with brown eyes are actually brown pigments that cover the blue, and a laser surgery can permanently turn brown eyes into blue eyes.

13. Some real colors are invisible to humans, and they are called "invisible colors."

14. About 2% of women develop a rare genetic mutation that causes an extra cone to appear in their eyes, which can distinguish 100 million colors.

15. Some people are born with two different colored eyes, which is called "Iris heterochromia."

16. The most eye color in the world is "brown".

17. The visual cell color of the color in the human eye is only sensitive to electromagnetic waves of three wavelength ranges of "red, green and blue", and the color seen by humans is a mixture of these three wavelengths.

https://www.zinff.com

此博客中的热门博文

How Often should you replace glasses?

Many of us go for years at a time without considering changing out our glasses because we doggedly believe that we can still see perfectly with our old lenses. While you may not have noticed or realized it, your old eyeglasses may be working against you, causing undue eyestrain or fatigue. But how often should we replace our glasses, and why? Listen to the Advice of Your Optometrist Your glasses should be replaced when your optometrist recommends that they should be. This usually will occur in tandem with your regular eye exam. The American Optometric Association recommends that non-senior adults and children over age 6 have regular eye exams a minimum of once every two years if they do not have risk factors for poor vision. Seniors over age 60 and individuals with risk factors should have an eye exam every year, or more frequently if recommended by their doctor. During this regular eye exam, you will need to ask your optometrist whether or not you need to replace your glasses w...

阅读全文

Have you chosen the right glasses?

With the development of science and technology and the popularity of digital products, more and more people wear glasses for myopia. Previously, people wear glasses only as a way to correct their poor vision. Now glasses are not only used correct myopia, but also as a very important decoration for people. If your glasses are not match with your style, the glasses will have bad influence on your image. How do you match your own glasses with your style? Here's how to choose the right eye for you. 1. Choose according to your face type How to identify your face: Give yourself a face contour and pick up your forehead to reveal the hairline. Take a frontal photo of yourself with a camera or mobile phone, pass it to the computer, use the drawing tools to trace the outline of the face, and the face map is done. Compare the face classification to find out your face shape. Various face types round face suitable for the water chest or rectangula...

阅读全文

How to choose the frames? (2)

3, On the logo - look at the material. Many frames will be framed on the temples, especially the precious metal frames of gold and titanium. Let's take a brief look at their logo. (1) GF/GP: GF is a gold-clad frame, which is a frame obtained by welding thin gold sheets on other metal substrates; GP is a gold-plated frame, that is, gold is plated on other metals. (2) Ti-P/Ti-C: Ti is a mark containing a titanium material, Ti-P represents pure titanium, and Ti-C represents a titanium alloy or the like. By the way, what is the difference between titanium, titanium alloy, beta titanium, and memory alloy? A. Pure titanium. Titanium metal materials with a purity of more than 99% of titanium can be used as pure titanium glasses. The frame made of pure titanium material has excellent characteristics such as high melting point, light material, strong corrosion resistance and firm plating layer, which can ensure the two important performances of the eyeglass frame beautiful and durabl...

阅读全文

zinff

搜索此博客