Cataract is the major cause of blindness, which is also caused by damage to the cornea, it occurs more often in old age. As one starts growing old, the lens of the eyes hardens, loses its 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 affected person loses vision and the world becomes dark to them.
The development of this is a complex process, however, some factors can be attributed to its development, cataract generally develops in old age but sometimes children are born with the same problem the cause for this is hereditary defect sometimes eye injuries too, cause cataract.
People exposed to sunrays for longer periods develop cataract earlier, 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 then they remains in dark.
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