The horopter is the set of points in space imaged on which retinal points?

The horopter is the set of points in space imaged on which retinal points?

• A. Corresponding retinal points
• B. Non-corresponding retinal points
• C. Foveal points only
• D. Peripheral points

Answer: (A)

The horopter hinges on retinal correspondence and binocular fusion. It is the set of points in space that project onto corresponding locations on the two retinas. When a world point lands on these matching retinal points, the brain fuses the two images into a single perception with no binocular disparity. Points that map to noncorresponding retinal locations create disparity and can produce double vision or depth perception, so they lie outside the horopter for that fixation. The horopter isn’t limited to the fovea or the peripheral retina; it’s a curved surface (for a given fixation) defined by where the two eyes’ retinas line up. So, corresponding retinal points best describe the horopter.

The horopter hinges on retinal correspondence and binocular fusion. It is the set of points in space that project onto corresponding locations on the two retinas. When a world point lands on these matching retinal points, the brain fuses the two images into a single perception with no binocular disparity. Points that map to noncorresponding retinal locations create disparity and can produce double vision or depth perception, so they lie outside the horopter for that fixation. The horopter isn’t limited to the fovea or the peripheral retina; it’s a curved surface (for a given fixation) defined by where the two eyes’ retinas line up. So, corresponding retinal points best describe the horopter.