In studies of binocular vision the horopter is a 3-dimensional curve that can be defined as the set of points in space from which the light falls on the corresponding points in the two retinas, that is, on anatomically identical points.
The horopter is a 3-dimensional curve. This is in studies of binocular vision. This dimensional curve can be defined as the set of points in space from which the light falls on the corresponding points in the two retinas, that is, on anatomically identical points.