Eye facts

AMAZING FACTS ABOUT OUR EYES

• The eyeball of a human weighs approximately 28 grams. 
• The white part of our eye is called the "sclera." At the front, the sclera becomes clear and is called the "cornea."
• The cornea is the only living tissue in the human body that does not contain any blood vessels.
• The conjunctiva is a transparent membrane that covers the front part of human eye. 
• Just behind the pupil is a lens. It is round and flat. It is thicker toward the middle. 
• Around the pupil is a colored muscle called the "iris." 
• Our eyes may be BLUE, BROWN, GREEN, GRAY OR BLACK, because that is the color of the iris. 
• Inside our eye, at the back, is a part called the "retina." On the retina are cells called "rods" and "cones." These rods and cones help us to see colors and light. 

• Blinking helps to wash tears over our eyeballs. That keeps them clean and moist. Also, if something is about to hit our eye, we will blink automatically. 
• Our eyelashes help to keep dirt out of our eyes. 
• Our eyebrows are made to keep sweat from running into our eyes. 
• The eye of a human can distinguish 500 shades of the gray. 
• We should never put anything in or near our eyes, unless we have a reason to use eye drops. We would only do that if our doctor or parent told us to use them. 
• The study of the iris of the eye is called iridology. 

Iris

• The shark cornea has been used in eye surgery, since its cornea is similar to a human cornea. 
• The number one cause of blindness in adults in the United States is diabetes. 
• Sailors once thought that wearing a gold earring would improve their eyesight. 
• Research has indicated that a tie that is on too tight cam increase the risk of glaucoma in men. 
• People generally read 25% slower from a computer screen compared to paper. 
• Men are able to read fine print better than women can. 
• In the United States, approximately 25,000 eye injuries occur that result in the person becoming totally blind. 
• All babies are colour- blind when they are born. 

• If the lens in our eye doesn't work quite right, we can get glasses to help us see. Glasses have lenses in them that work with our eye's own lens to help us see better. 
• Babies' eyes do not produce tears until the baby is approximately six to eight weeks old. 
• The reason why your nose gets runny when you are crying is because the tears from the eyes drain into the nose. 
• The most common injury caused by cosmetics is to the eye by a mascara wand. 
• Some people start to sneeze if they are exposed to sunlight or have a light shined into their eye. 
• It is impossible to sneeze with your eyes open. 
• The space between your eyebrows is called the Glabella. 
• Your eyes blink over 10,000,000 times a year!