A small region of each eye's visual field, corresponding to the location of the optic nerve head (optic disk) within the retina. It's a photoreceptor-free area of the retina and lacks visual input.
 
Also Known As
- Punctum Caecum
 -  Blind Spot
 
A small region of each eye's visual field, corresponding to the location of the optic nerve head (optic disk) within the retina. It's a photoreceptor-free area of the retina and lacks visual input.