When the lens of the eye turns cloudy enough to impair vision, it is considered a cataract.
Cataracts are the main cause of blindness worldwide.
Four out of ten persons over 60 years old develop cataracts. Treatment consists of a safe and simple surgical procedure. The lens of the eye is the structure in charge of focusing objects at different distances from the eye. It is capable of changing its shape to do so. With time, the lens looses its transparency turning opaque.