Diabetes causes an excessive amount of glucose to remain in the
bloodstream, which may damage the blood vessels. Within the eye
the damaged vessels may leak blood and fluid into the
surrounding tissues and cause vision problems. Reviewed last on:
5/20/2009 Deborah Wexler, MD, Assistant Professor of Medicine,
Harvard Medical School, Endocrinologist, Massachusetts General
Hospital. Also reviewed by David Zieve, MD, MHA, Medical
Director, A.D.A.M., Inc.