Rays entering through the cornea and transmitted by the lens onto the retina, which is located behind the eye. Optic nerve carries information about the objects we see it from the retina to the brain. Four small muscles to move their eyes their duties according to our needs.
The eyes are like camera work automatic. Rays are coming from the object into the eye through the lens. The lens is very flexible and will be moved by small muscles, so that the shadows of objects precisely centered in the back of the eye.
Iris (iris of the eye) location was in front of the lens. His job is not much different as the camera diaphragm, which prevents the amount of light entering the eye. While in the back of the eye is the retina, which is a collection of nerve fibers that can transmit messages to the brain. The message is usually a number and color of the incoming rays.
The retina is actually not much different as the film in a camera. The most sensitive part of the retina is called the fovea, which was situated in the center of the retina. When you see an object, the shadow of an object is focused on the fovea, so that these objects can be clearly seen.
Like the camera, the eyes also have to be really precise proportions. Once off one millimeter closer or more distant, the shadows of these objects can not be centered properly on the retina. The accuracy of these actually have to be really awake since humans are born (when the eye length is about 14 millimeters) to adulthood (when the eye length is approximately 24 millimeters).
Daily Disturbance In the Eye
As a gift, a very vital organs for humans is often lack of reasonable attention. The things that cause the eyes disturbed often ignored. In fact, without eyes, life is a narrow and torture. Have you heard the story of Helen Kehler famous ?
Disturbance, for example, in determining the distance reading. In order not hurt the eyes, read a healthy distance is approximately 30 centimeters. In addition, at the time of reading, lighting should also be sufficient and adequate. But usually precisely this sort of thing that often do most people.
Unfortunately, since little things like that too often condoned by parents. When adult, the child would suffer. Because, chances are he has to wear glasses or even have surgery. Too bad if the eye becomes blind.
Another bad behavior is the time to watch television. A good distance is about 3 meters. But, in reality, not a few children who watch television a distance of only 1 meter course, even closer. Especially when I'm busy playing games.
When using or playing computer games, eye health was often overlooked (less attention). And also, to see distant objects, objects or object that you want to see really can not be longer than 6 feet. But even this is often violated.
Beginning of the disturbance caused by some bad behavior is the occurrence of fatigue in the eye. Unfortunately, even then not receive appropriate attention. In fact, a lot of eye medications are available at pharmacies or shops.
My advice, provide eye drops in the medicine cabinet. Because the eye drops were very helpful to treat tired eyes. For example, after after swimming, long trips, after reading the book, or after watching television in a long time, and others.
Remember guys, do not let our eyes in a state of exhaustion. Because, if we leave too often or often we let it, it can lead to eye health disorders are more serious.You do not want, right ?
Okay guys, got here first....
Hopefully there are benefits !
3 comments:
nice post :)
nice to be here :)
visit me, i will visit u
numpang lewat aja, ngga bisa ikut celoteh... salam kenal...
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