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Pharmacy Links

CATARACT – RADIATION

15th May 2009

The lens of the eye is behind the iris, or colored portion, and is held in place by ligaments.

It has muscles which alter its shape so as to focus light rays on the retina, the sensitive nerve-endings at the back of the eye.

As we age, the lens gradually loses the ability to focus objects close to the eyes and so glasses may be needed for close vision. This condition is called presbyopia.

In cataract, the lens becomes increasingly opaque, interfering with the passage of light and impairing vision.

Cataract may develop from many causes and even be present at birth. Cataract which comes on with age is a degenerative process.

Rubella (German measles) in the mother during pregnancy may lead to congenital cataract in the newborn. Radiation may lead to cataract, as can prolonged exposure to severe heat and cataract was an occupational hazard in glass workers because of this.

It may arise from infection or inflammation in the eye or the prolonged use of cortisone drops prescribed for some other eye disorder.

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