The concept of eye excercises has existed right from Greek times—Euclid's work on optics, Plato's theory of vision and Aristotle's familiarity with myopia are known to any student of antiquity.
The retina is the light-sensitive, colour-appreciative tissue which converts light to electrical impulses for subsequent conduction via the optic nerve to the brain.
The expressions squint, cross-eyes, or cock-eyes or the medical term—strabismus—all refer to the same disorder—the two eyes do not look in the same direction.
A cataract can be removed basically in two ways: "intracapsular," taking the lens out with its enclosing capsule, or leaving the capsule and only taking the lens out—"extracapsular".
Dr. William Bates, a New York oculist, in 1921 propounded a theory, admirably simple, that nearsightedness, far-sightedness and astigmatism are caused by abnormal action of the six external eye muscles.
This type of myopia is accompanied by degenerative changes in the eye and, if left unchecke, it can, by various retinal and media complications, lead to blindness.
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Eye Disorders
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