Diabetic Retinopathy or Diabetes-related retinopathy occurs when small blood vessels leak and bleed in the retina. The retina is layer of the eye that acts like the film in the
Glossary of Terms - D
Common terms to help you learn more about your eyes and vision
Distance Vision
Ability to distinctly perceive objects at a distance, usually tested at 20 feet.
Diopter
Metric unit used to denote the refractive error of the eye or lens.
Depth Perception
The blending of slightly dissimilar images from the two eyes for the perception of three–dimensional depth.
Degeneration
Tissue changes that make it less able to carry out its function.