What is cataract?
Why it happened
Answers
Clouding of the normally clear lens of the eye.Most cataracts develop slowly over the course of years.Most cataracts develop when aging or injury changes the tissue that makes up your eye's lens. Some inherited genetic disorders that cause other health problems can increase your risk of cataracts. Cataracts can also be caused by other eye conditions, past eye surgery or medical conditions such as diabetes.
Answer:
Cataract is the major cause of blindness, which is also caused by a damage to the cornea. It occurs more often in old age. As one starts growing old, the lens of the eye hardens, loses it transparency and becomes opaque. It obstructs the light rays from entering the eye. The onset of cataract blurs the vision. Sometimes, the cataract patient sees multiple images instead of a single object image. Because of the gradual development of cataract, the afflicted person loses his/her vision and the world becomes dark to him/her. The development of cataract is a complex process. However, the following factors can be attributed to its formation. Cataract generally develops in old age but sometimes, children are born with cataract because of hereditary defect. Eye injuries too, can cause cataract. People exposed to sunrays for longer periods develop cataract earlier than others. Researchers opine that the smoke inhaled while smoking, carries substances internally damaging the eyes. Ultraviolet radiation, invisible to the human eye, is linked to skin cancer. The victim loses vision and the world becomes dark to him.
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