It is the locus of points in space with the same fixation as disparity. Theoretically, it is the points in space that project on anatomically identical positions in the two retinas, i.e., corresponding points in both retinas.
It is the locus of points in space with the same fixation as disparity. Theoretically, it is the points in space that project on anatomically identical positions in the two retinas, i.e., corresponding points in both retinas.
