Vascular endothelial growth factor (VEGF)

A protein which induces the growth of new blood vessels and is usually produced in response to impaired oxygen flow to tissues. It may be produced in increased quantity in diabetic retinopathy and age-related macular degeneration.

Vision rehabilitation aids

Devices such as magnifiers and closed circuit television sets that can help people with sub-normal vision see more and function better in day to day activities. Also known as Low Vision aids.