Cataracts are a progressive condition and usually develop gradually over a couple of years.
However, if the cause of the cataract is diabetes or trauma to the eye, the cataract may develop rapidly. How quickly cataracts develop also depends on the type of cataract.
Cataract surgery is most effective at restoring 20-20 vision when performed early. As soon as patients notice any symptoms of a cataract they should contact an opthalmologist.