from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. For any system of binocular vision, the horopter is a three-dimensional curve which contains all points from which the light will converge into a single image.
from the GNU version of the Collaborative International Dictionary of English
- n. The line or surface in which are situated all the points which are seen single while the point of sight, or the adjustment of the eyes, remains unchanged.
from The Century Dictionary and Cyclopedia
- n. The locus of all the points in space which in any position of the eyes form images falling upon corresponding points of the two retinæ.
Sorry, no etymologies found.