uDEFINITION: ability
to resolve or see fine details.
uVisual Angle:
DEFINITION: Angle formed by object on
retina.
uTypes of Acuity:
what is meant by acuity depends upon the
stimulus used to measure it.
lDetection: black bar on white field
lResolution: a grating
lRecognition: e.g. Snellen, where
l you read letters.