Retinopathy is the disease of the retina, usually resulting from either diabetes mellitus or alternatively from persistent hypertension (high blood pressure). There are two types of retinopathy.
Cataract is the opacity in the lens of the eye. The normal lens allows light to reach the retina when it becomes opaque and does not allow light to reach the retina, the person is unable to see clearly. Cataract is due to (coagulation) changes in the delicate protein fibres within the lens, cataract never causes complete blindness but causes increased loss of transparency. The clarity and the detail of the image is progressively lost. The front part of the lens becomes densely opaque and whiteness is visible in the pupil.
The causes for cataract formation in the adult is related to aging, sun light exposure, smoking, poor nutrition, eye trauma, systematic diseases like diabetes mellitus, infection and injuries and certain medications such as steroids. Sometimes German measles in pregnant mothers causes cataract in the child.
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