How can cataract occurs in thin retina and what are its symptoms?

Cataracts. Cataracts are independent of the retina. They can cause decrease in vision, causing halos &glare; blindness when advanced (cataracts are #1 cause of blindness in world still) More info: eyedoc2020.blogspot. Com.
Is this what you mea. Is this what you mean? If there is a retinal problem will there be an increased risk of cataract? Cataracts can form as a consequence of retinal surgery. In that circumstance there will be a diminution in the clarity of vision as a classic symptom.