Certified Ophthalmic Medical Technologist (COMT)

Answer: D - Proteinuria, elevated BUN and creatinine are good predictors of microvascular damage in the diabetic eye.

High glucose levels in the circulatory system can cause a glycosylation reaction between the sugar and proteins of the vessel walls. This leads to capillary thickening and breakdown over time. The microvasculature of the eyes is more susceptible to this damage, so monitoring these levels is an effective way to detect potential ocular complications.