Phorometry Flashcards
What is phorometry?
Subjective testing of ocular posture through removal of fusion stimuli
When can phorometry not be done?
With a constant tropia
What is the preferred method of phorometry?
Von Graefe
What is the dissociating prsim?
Separates the images, like the cover paddle
What is the measuring prism?
Moves to neutralize phoria, like a loose prism or prism bar
At what rate should you move the measuring prism?
2 pd per second
What do the horizontal maddox lines represent
Vertical line image
Horizontal measurment
what do the vertical maddox lines represent
Horizontal line image
Vertical measurement
What does a crossed disparity represent?
An exo deviation
What does an uncrossed disparity represent?
An eso deviation
When is the double maddox rod used?
For cyclophorias
Which method of phorometry is used to measure only horizontal phorias?
Howell card
