The eye contains a lens that enables us to focus on objects. This lens has a consistency like jelly that allows it to change shape as we view objects at different distances. As we get older this jelly can harden and turn cloudy. This cloudiness is called a cataract. Diabetes is also a common cause of cataract formation.
Cataracts develop over a period of months to years.
As the cataract worsens, problems may develop in visualising objects at distance, although closer objects may still be viewed clearly. As the condition develops vision from the affected eye worsens with the complete loss of sight. It is common for cataracts to develop in both eyes, although at different speeds and times. If the difference in sight between the eyes is large , the person may complain of double vision. If eyesight deteriorates to a point where you cannot continue with your normal lifestyle an ophthalmologist will operate to remove the cataract completely.