Definition of Blind spot

Blind spot: In ophthalmology, a blind spot is:

1. A small area of the retina where the optic nerve enters the eye; this type of blind spot occurs normally in all eyes.
2. Any gap in the visual field corresponding to an area of the retina where no visual cells are present; this type of blind spot is associated with eye disease.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=10542
Last Editorial Review: 6/14/2012