CenterVue
COMPASS Operating Manual
Pag. 19 di 53
The following perimetric parameters are used and cannot be modified:
background luminance:
31.4 asb
maximum luminance (0 dB):
10000 asb
stimulus duration:
200 ms
stimulus size:
Goldmann III
blind spot test:
ON
foveal threshold:
ON
false Positives:
ON
false Negatives:
ON
fixation target for foveal stimulus:
4 green circles in diamond configuration
fixation target for non-foveal stimuli: single green circle
9.8 Before starting
Following are some hints to maximize the effectiveness of the test:
check that the lens cap has been removed
check that the room is sufficiently dark
subject should sit in a comfortable position, with the forehead and chin in firm
contact with the corresponding rests. Subject’s head should be vertical and not
tilted. Chin rest should be positioned so that eye is aligned to the mark
ask the subject to look at the fixation target throughout the test
perform a quick training on subjects that never had perimetry before
