In mammalian eye, the 'fovea' is the center of the visual field, where

In the mammalian eye at the posterior pole of the eye, lateral to the blind spot, there is a yellowish pigmented spot called macula lutea with a central pit called the fovea. The fovea is a thinned-out portion of the retina where only the cones are densely packed. It is the point where the visual acuity (resolution) is the greatest. 

The optic nerve leaves the eye at the blind spot.