vs3 lecture 3 horopter

The flashcards below were created by user sbkenbs on FreezingBlue Flashcards.

1. 2 variables affect the shape of a horopter.
• 1) skew - relates to relative magnification, R.
• 2) curvature - this is the Hering-Hillerband deviation, H.
2. What is Horopter skew and what is the equation?
R = tan (alpha-2)/ tan (alpha-1)

• If both eyes lie on the horopter the 2 angles, alpha 1 & 2 are equal to each other so R = 1 and therefore no relative magnification in either eye. Object space = perceived space.
• When the 2 angles don't = to make R=1, one eye's image is mag/minified relative to the other, aniseikonia.
3. If alpha-1 is kept the same and alpha 2 is magnified which way do we move the rod? Closer or farther? Closer so the angle of alpha-2 becomes smaller again to match alpha-1.
4. A horopter always skews towards the ____ eye.
Magnified eye.
5. Move the 2 points P and Q to put it back on the horopter and what does the new horopter look like?
Which point displays Crossed or Uncrossed disparity.
• P is crossed. Q is uncrossed.
• Push P farther and pull Q closer.
• 6. If R>1, which eye is magnified and what does the new horopter look like?

If R<1?
• R>1 then
• • ---------------------------
• R<1 then
• Author: sbkenbs ID: 193632 Card Set: vs3 lecture 3 horopter Updated: 2013-01-18 22:14:00 Tags: vs3 lecture horopter Folders: Description: vs3 lecture 3 horopter Show Answers: