Cataract - Causes, Symptoms & Treatment

A cataract clouds the lens of the eye, limiting vision. It can be compared to a window that is frosted or yellowed. When the amount of light that passes through the lens is reduced and scattered by the cataract, images are not correctly focused on the retina at the back of the eye. The result is that vision becomes poor - it can be compared to looking through a frosted or steamed window. Cataract formation affects only the lens of the eye and not any of the other important structures, such as the cornea, iris, retina or optic nerve. A cataract will often worsen to a point where surgery is needed to remove the cloudy lens and replace it with a permanent artificial lens.

A cataract is a clouding of the eye's natural lens, which lies behind the iris and the pupil. Looking through a cloudy lens is like trying to see through a frosty or fogged-up window. Clouded vision can make it more difficult to read, drive a car especially at night or see the expression on a friend's face. Cataracts commonly affect distance vision and cause problems with glare. They generally don't cause surface irritation or pain. Clouding of the lens is a normal part of getting older. About half of Americans ages 65 to 74 have cataracts. Over 90 percent of those age 75 and over have this condition. Most people with cataracts have a cataract in both eyes. However, one eye may be worse than the other because each cataract develops at a different rate.

Causes of Cataract

The common Causes of Cataract :

• Injury to the eye.
• A family history of the eye condition
• Unknown factors.
• Diabetes.
• Medical problems, such as diabetes .
• Previous eye surgery.
• Smoked for a period of time.
• Medications, especially steroids.
• Exposed their eyes to sunlight without protection over a long term

Symptoms of Cataract

Some common Symptoms of Cataract :

• Sensitivity to light and glare.
• Poor night vision.
• Frequent spectacle prescription changes.
• Double vision in a single eye.
• A painless blurring of vision
• Increasing difficulty with vision at night.
• Clouded, blurred or dim vision.
• Fading or yellowing of colors.
• Glare, or light sensitivity.

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