AC/A Flashcards
1
Q
What does AC/A stand for?
A
Accommodative convergence to accommodative demand ratio
2
Q
How do you calculate AC?
A
PD(cm)/WD(m)
3
Q
How do you calculate A?
A
Reciprocal of viewing distance or 100/WD(cm)
4
Q
What are the units of measurement?
A
Prism diopters/diopters
5
Q
What is different about the gradient AC/A?
A
Measured through a defined lens power at a set distance
6
Q
What should you expect with plus lenses?
A
Relaxation of accommodation and more exo deviation
7
Q
What should you expect with minus lenses?
A
Stimulation of accommodation and more eso deviation
8
Q
What is the gradient equation?
A
Change in accommodation convergence/change in lens power
9
Q
Which of the types of AC/A is theoretical?
A
Calculated
