4.2 Visual Acuities Flashcards
COA VAs
1
Q
Top line on VAs (numerator)
A
Always the test distance
2
Q
Bottom line on VAs (denominator)
A
Compared to the national average. Also, the angle the letter hits the retina
3
Q
Pinole improves vision in refractive error or disease state?
A
Refractive error
4
Q
Stereo acuity is monocular or binocular
A
Binocular (you need two eyes for depth perception)
5
Q
Stereo acuity is measured in
A
Seconds of arc
6
Q
Lower # on seconds of arc in stereo acuity is better or worse depth perception?
A
Lower is BETTER (Just like 20/10 is better than 20/400 20seconds of arc is better than 60seconds of arc)
