A cataract clouds the lens of the eye thus limiting vision. It can be liken to a window which is frosted or yellowed. In this, images are not correctly concentrates on the retina of the eye as amount of light reduced and strewn by the cataract. The result is that vision becomes poor. Cataract formation hampers only the lens of the eye and not any of the other important structures. A cataract will worsen to a point where surgery is needed to remove the defective lens and replace it with a permanent artificial lens.

A cataract means clouding of the eye’s natural lens, which exists behind the iris and the pupil. Clouded vision causes more difficult to read, drive mostly at night or see the expressions on face. Cataracts mostly affect distance vision and cause problems with vision. They usually don’t cause surface irritation or ache. Clouding of the lens is normal for old aged. Nearly half of Americans between 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 their both eyes. Nevertheless, one 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.