5.1. The Human Eye and Retinal Structure


Diabetic patients often have long histories of poor glycemic control, which can eventually lead to the development of retinopathy, characterized by vascular permeability changes. This altered vascular permeability may lead to what is known as diabetic macular edema (DME), accumulation of fluid within the retina that if left untreated leads to varying degrees of vision loss. Diabetes acts on all retinal cell types including: retinal vessels (endothelial), choroidal, Mueller (glial) and neuronal cells.

Quiz Module 5.1

1. Which of the following statements is/are correct concerning diabetic macular edema (DME)?

2. True or False: Although blood vessels radiate out from the optic nerve in all directions, the fovea is a relatively avascular area of the retina.

3. Which of these retinal cell types are adversely affected by diabetes?

4. True or False: Photoreceptors translate light activity from a biochemical message into an electrical message.