ASTIGMATISM

Astigmatism is a vision condition that causes blurred vision due either to the irregular shape of the cornea, the clear front cover of the eye, or the curvature of the lens inside the eyes. An irregular shape of the cornea or lens prevents light from focusing properly on the retina, the light-sensitive surface at the back of the eyes. As a result, vision becomes blurred at any distance.

This condition frequently occurs with other vision condition such as myopia and hyperopia. Together these vision conditions are referred to as refractive errors because they affect how the eye bends or refracts light.

Etiology: the specific cause is unknown. It can be hereditary and usually present from birth. It can change as child grows and may decrease or worse over time.

The cornea and lens are primarily responsible for properly focusing light entering in the eyes, allowing see clearly. Astigmatism occurs due to the irregular shape of the cornea or lens inside the eye.

It is a very common condition. Most people have some degree; slight amounts of astigmatism usually don’t affect vision and don’t require treatment. However, large amounts cause distorted or blurred vision, eye discomfort and headache s.

Diagnostic: astigmatism can be diagnosed through a comprehensive eye examination by a doctor of optometry. Testing for astigmatism measures how the eyes focus light and determines the power of optical lenses needed to compensate for the reduced vision.

Treatment: there are a several options available to regain clear vision include

ü Eyeglasses

ü Contact lenses

ü Orthokeratology

ü Refractive surgery procedures

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