Diabetes and vision are directly linked with each other in many aspects. blurry vision can be the first sign of having diabetes. Those who are suffering from uncontrolled diabetes should have regular visits to the eye clinic, as the high sugar levels in the blood can eventually lead to blindness. Some of the common symptoms of diabetic eye disease that can be noticed are blurred vision, eye aches, headaches, watery eyes, glare or halos around lights, double vision in one eye, frequent changes in vision or having to change glasses dramatically, poor color vision, and flashes of light can also be observed. uncontrolled Diabetes can lead to cataract changes in the lens earlier than those with normal blood sugar level.