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In Malaysia we may find some people with a squint eyes or strabismus. What is strabismus or squint eye? In Bahasa Malaysia strabismus or squint is call as mata juling.A person is said to have a squint eye when one of the two eyes is not directing to the same point as the other eye. In other word there is no similar focus point for both eyes. Because there is no similar focus point, the images receive by both of the eyes cannot be superimpose in the brain. Instead of the brain receiving the same images of the same objects and to be superimposed in the brain, the brain is now receiving two images of the different object which cannot be superimpose by the brain. In eyes with squint or strabismus, the brain is receiving two images of the different object which cannot be superimposed. When our brain cannot superimpose the two images view by the two eyes, our brain will take the drastic action of suppressing one of the images. Usually our brain wills supressed the retinal image of the lower quality. Our brain need to have two retinal images of the same object to be superimposed in order to have depth perception. Without two retinal images of the same object being superimpose on top of each other, no depth perception is possible. In other words, a person who has a squint or strabismus will not have a depth perception. A person with a squint may be able to see with a 6/6 vision but without any depth perception. What is the advantage of having a depth perception? With a depth perception a person is able to judge the size of an object more accurately. A driver with no depth perception will not be able to judge how far, he is driving from the car in front of him. A surgeon with no depth perception will not be able to accurately judge how far the tissues are from him. In other words, a person with a squint or strabismus will not have a depth perception and they will not become a good driver, pilot or a surgeon. (more…)

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