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Since even small amounts of vision loss due to glaucoma cannot be reversed, early detection of the condition through regular eye examinations is critical. If glaucoma is detected early, lifelong medical treatment can halt the progress of the disea...
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Blindness is the lack of vision, or a loss of vision that cannot be corrected with glasses or contact lenses. Blindness may be partial, with very limited vision, or complete, with no perception of light. People with vision worse than 20/200, or a field of vision of less than 20 degrees in the better eye, are considered legally blind in most states in the U.S.
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Total blindness is the inability to tell light from dark, or the total inability to see. Visual impairment or low vision is a severe reduction in vision that can ' t be corrected with standard glasses or contact lenses and reduces a person ' s ability to function at certain or all tasks.
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Optic nerve atrophy involves tissue death of the nerve that carries the information of vision from the eye to the brain.
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