Visual acuity Flashcards
1
Q
Visual acuity
A
Capacity for seeing distinctly the details of an object
2
Q
Detection
A
Minimum distinguishable
Ability to detect a point stimulus against uniform background
3
Q
Resolution
A
Minimum separable
Detection of separation of 2 lines or points
4
Q
Localization
A
Vernier acuity
Ability to detect misalignment of opposing lines
5
Q
Recognition
A
Minimum legible
Ability to detect minimum detail with knowledge and identification of the form
6
Q
Optimal pupil size
A
2-3mm
7
Q
Numerator of Snellen
A
Test distance of patient from chart
8
Q
Denominator of Snellen
A
Distance at which detail subtends 1’ or letter subtends 5’
Distance a normal eye can see the smallest letter read
