Diabetes is caused when the body is unable to properly regulate the amount of glucose in the blood.  Symptoms can be very mild and so can be very difficult to spot.  Long term poor control of diabetes can affect the eyes by causing retinal blood vessels to leak.  The blood vessels become more prone to bleeding, causing risk to the sight of the eye.  Generally speaking, the earlier any diabetic retinopathy is noticed in the eyes the better the outcome after any treatment.  People with diabetes are also more prone to cataract and macular changes causing a reduction in vision.  Because of this, diabetic patients are advised to have regular eye exams.  At Vision Care these are covered with a BC care card yearly.