These are the result of chemical changes in the lens of the eye and cause the clear lens to turn cloudy. Cataracts are the leading cause of vision loss. Optometrists can assess cataract and monitor the condition.
AMD is the leading cause of blindness and is caused by deterioration of cells in the macula (the part of the retina that is responsible for clear, sharp vision). Vision that is lost as a result of AMD cannot be restored.