horopter वाक्य
उदाहरण वाक्य
मोबाइल
- Later Hermann von Helmholtz and Ewald Hering worked out the exact shape of the horopter almost at the same time.
- These early empirical investigations used the criterion of singleness of vision, or absence of diplopia to determine the horopter.
- The empirical horopter is flatter than predicted from geometry at short fixation distances and becomes convex for farther fixation distances.
- Geometrically the horopter is a circle passing through the nodal point of the two eyes and through the fixation point.
- This was observed by Hering and Hillebrand at the same time, as well as Helmholtz for the vertical horopter.
- But this is true only for short fixation distances where the empirical horopter is intermediate between these two set of points.
- At first glance, it seems that Aguillon discovered the geometrical horopter more than 200 years before Prevost and Vieth and Muller.
- With little time to do research and even scarcer financial resources, he turned to binocular vision and the problem of the horopter.
- The output signals from the LGN determine the spatial dimensions of the stereoscopic and monoscopic portions of the horopter of the visual system.
- At some given distance, called the abathic distance, the empirical horopter becomes a straight line, thus matching the apparent fronto-parallel plane.
- The horopter was then used by architect Girard Desargues, who in 1639 published a remarkable treatise on the conic sections, emphasizing the idea of projection.
- In studies of binocular vision the "'horopter "'is the locus of points in space that have the same disparity as fixation.
- This analysis shows that, for a given fixation point, one has a different horopter circle for each different choice of the nodal point s location.
- There is also an empirical vertical horopter, which is effectively tilted away from the eyes above the fixation point and towards the eyes below the fixation point.
- This horopter geometry of a circle in the fixation plane and a perpendicular line remains true as long as the eyes are fixating somewhere on these two lines.
- The horopter the set of points that projects at the same location in the two retinae ( i . e . that have the same visual direction ).
- He noticed, alongside with Helmholtz and Hillebrand, that the empirical horopter does not perfectly match the theoretical horopter, a phenomenon now named the Hering Hillebrand deviation.
- He noticed, alongside with Helmholtz and Hillebrand, that the empirical horopter does not perfectly match the theoretical horopter, a phenomenon now named the Hering Hillebrand deviation.
- Moreover the vertical horopter have been consistently found to have a backward tilt of about 2 degrees relative to its predicted orientation ( perpendicular to the fixation plane ).
- As Helmholtz predicted, and Solomons subsequently confirmed, in the general case which includes cyclorotation of the eyes, the theoretical horopter takes the form of a twisted cubic.
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