Jumaat, 29 Januari 2010

limitation of sight

Optical illusion
Optical illusion

Limitation of Sight

A. Blind spot
•At certain distance from the eye, some object that you can see previously may disappear, after certain moment, it will reappear.
•This phenomenon occurs because the image of the object has fallen onto the blind spot in your eye.
•This blind spot does not have any photoreceptors. As result, the image of the cross that falls on this spot cannot be detected, and that's why you can't see it.

B. Optical illusion
•Optical illusion are caused by disturbances to the nerve impulses going to the brain.
•The disturbances may caused by the object or condition around the object.
•The brain cannot accurately interpret the information sent by the receptors in eye.
•That’s why you will incorrectly interpret what you actually see.



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