 Macular Edema Swelling of a particular site of the retina can become a significant problem for Diabetics undergoing Cataract surgery. And a significant number of people who undergo Cataract surgery each year are diabetics. And when you multiply these two factors together you are left with a significant number of people who do not gain as much vision as their peers. Diabetics who develop Macular Edema actually can loose some vision after surgery and when you follow them up, they dont gain as much vision. This Study aims to prevent such an event from happening and therefore allow Diabetics to gain as much vision as they can from cataract surgery. This study will use Dexamethasone injected intravitreally into the gel of the eye at the end of cataract extraction to control Macular edema brought about by surgery. The main outcome is the central retina thickness and retinal volume as measured by Optical Coherence Tomography. Secondary outcomes are BCVA and incidence of Laser Treatment. 