Blindness is a state of being sightless or total blackness of vision; but ordinarily means severe decline with only residual vision in one or both eyes.

About 300-400 million people worldwide suffer from vision impairment that cannot be corrected with eyeglasses, contact lenses or surgery; of which 50 million are totally blind, mostly people above 50 years.

Colour blindness, which is hereditary, constitutes inability to distinguish between certain colours; while night blindness is the inability to see under decreased illumination.

Under-developed countries account for 85% of the world’s blind because of infections, injuries, nutritional deficiencies, glaucoma, cataract and diabetic complications.

Poor vision due to refractive errors can be corrected with prescription glasses, nutritional vision deficiencies can be cured through dietary changes, eye infections can be treated with appropriate medication and cataract can usually be removed through simple surgery.

Vision loss due to optic nerve damage or stroke cannot usually be restored.

Proper awareness about eye-care and timely medical attention can prevent 80%-90% of world’s blindness, early detection and treatment can prevent glaucoma; and diabetic retinopathy can be avoided by sugar-control, weight management and regular exercise.

Blindness can be detected by testing visual acuity and measuring the vision fields of each eye.

People who lose vision suddenly at later stages in life find it more difficult to cope up with the problem without adequate support system.

One’s world collapses due to sudden loss of vision and the individual is driven towards overdependence on others with possible onset of gloom and self pity, although it did not dissuade John Milton and Helen Keller from pursuing their remarkable accomplishments.

Article Written by Dolphi D'Silva [275 Words]
Posted on Oct 5, 2013 with Views.

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