DEFINITION

A cataract is a dense , cloudy area that forms in the lens of the eye. A cataract begins when proteins in the eye form clumps that prevent the lens from sending clear images to the retina. The retina works by converting the light that comes through the lens into signals. It sends the signals to the optic neve which carries them into the brain

Cataract develops slowly and eventually interferes with your vision. Cataracts are common in older people

SYMPTOMS

• blurry vision
• trouble seeing at night
• seeing colors as faded
• increased sensitivity to glare
• halos surrounding lights
• double vision in the affected eye
• a need for frequent changes in prescription glasses

CAUSES

• an over production of oxidants which are oxygen molecules that been chemically altered due to normal daily life
• smoking
• ultra violet  radiation
• the long term usage of steroids and other medications
• certain diseases such ass diabetes
• trauma
• radiation therapy

TREATMENT OF CATARACT

SURGERY: It is recommended when cataracts prevent you from going about your daily activities such as reading  or driving . Its also performed when cataract interfere with the treatments of other eye problems’

One surgical method known as phaco-emulsification involves the use of ultra sound waves to break the lens apart and remove the pieces

Extra capsular surgery involves removing the cloudy part of the lens through a long incision in the cornea .After  surgery  an artificial intra ocular lens is placed where the natural lens was. Cataract surgery   usually an out patient procedure  takes an hour or less to perform. First your doctor will place eye drops in your eye to dilate your pupil . You will receive local anesthesia to numb the area and you may be given a sedative to help you relax

Surgical methods used to remove cataracts include , using ultra sound probe to break up the lens for removal or making an incision in the eye and removing the lens in one piece

After the removal of the cataract the artificial lens is implanted into the empty lens capsule

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