Although these various horopters are measured using different techniques and have different theoretical motivations, the shape of the horopter remains identical regardless of the criterion used for its determination.
42.
But the horopter can also be defined as the center of the Panum's fusional area, the apparent fronto-parallel plane or the equal distance from fixation.
43.
What is less simple to show is the fact that, for fixations along a given Vieth-M�ller circle, all the corresponding horopter circles intersect at the point of symmetric convergence.
44.
His research interests were population genetics, inbreeding, paternity diagnosis, evolution, biometrics, sensory physiology ( optimal Horopter ), sex ratio in humans and animals and the right-left problem.
45.
In this case the horopter becomes a single-loop spiral passing through the fixation point and converging toward the vertical horopter at the top and bottom extremities and passing through the nodal point of the two eyes.
46.
In this case the horopter becomes a single-loop spiral passing through the fixation point and converging toward the vertical horopter at the top and bottom extremities and passing through the nodal point of the two eyes.
47.
Today the horopter is usually defined by the criterion of " identical visual directions " ( similar in principle to the " apparent motion horopter ", according that identical visual directions cause no apparent motion ).
48.
Today the horopter is usually defined by the criterion of " identical visual directions " ( similar in principle to the " apparent motion horopter ", according that identical visual directions cause no apparent motion ).
49.
If the eyes are in primary position, i . e ., fixating straight ahead at infinity, the Vieth-M�ller circle has infinite radius and the horopter becomes the two-dimensional plane through the two straight horopter lines.
50.
If the eyes are in primary position, i . e ., fixating straight ahead at infinity, the Vieth-M�ller circle has infinite radius and the horopter becomes the two-dimensional plane through the two straight horopter lines.
