Causes and treatments of low vision

For young peoThe term low vision can refer to various vision conditions, such as partial sight, uncorrectable sight, tunnel vision, blind spots, legal blindness and almost total blindness.

Consequences of low vision include blur or lack of acuity, decreased ability to distinguish colors, low contrast sensitivity and abnormal spatial relationship perception. People with low vision may have vision problems in central vision zone or/and peripheral vision zone. Some of them also suffer low night vision.

Low vision has many potential causes. Some children may acquire low vision from heredity or birth defect, while other children develop low vision from various eye injuries. In most cases, low vision occurs in seniors. In old people, eye disease is the major contributor to low vision problems. Eye diseases that may cause low vision include cataracts, macular degeneration, diabetic retinopathy, glaucoma and retinitis pigmentosa. Some of them affect central vision and others impact peripheral vision.

Low vision can cause many social and life problems. The Lighthouse International estimates that only 43.7% of visually impaired Americans between 21 and 64 are fully employed, versus an 80% among those with normal vision. Visually impaired people may have difficulty in daily lives such as driving, reading newspapers and images, watching television, and using computer. Unable to do these normal things, individuals may feel frustration and depression. They have to rely on their friends and relatives, and sometimes they may feel lonely. They are to some extent independent.

Fortunately, there are some remedies for low vision problems, such as magnifiers, telescopes and video magnifiers. Before taking these low vision aids, you should receive a comprehensive eye exam to search out potential, underlying eye diseases. Low vision symptoms may be primary signs of eye diseases such as age-related macular degeneration, glaucoma and retinitis pigmentosa. In some cases, low vision can be improved by removing underlying causes. For those with vision loss that can not be cured by normal treatments, they can resort to low vision devices prescribed by a low vision specialist. Of course, large-face printed materials, audio tapes and special light fixtures also offer help.


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