Welch Allyn Light Sources - User Manual - Manuale (Pagina 52)

48 Strumento per la misurazione del campo visivo Humphrey Matrix
Rev. A 1/6/04 Cod. 112738-1IT
Humphrey Matrix N - 30 FDT Tests
8-9x9-10 degree FDT patterns (25 Hz, 0.25 cycles/degree)
Horizontal axis offset +/- 1 degree
Vertical axis offset +/- 3 degrees
(~1 degree square stationary central fixation target)
Right Eye
8 degrees
9 degrees
10
d
eg
re
es
9 de
gr
ee
s
30 30
30
30
Key
HFAII 24-2 (54 pts)
HFAII 30-2 (76 pts)
FDT N-30 (19 pts)
9 degrees
Self-alignment
"corners"
(4 places)
30 degree FOV
9 degrees
8 degrees
+ / - 3 degrees
horiz. offset
Blindspot
target
(~ 1 degree
diameter)
10 degrees
10
de
gre
es
9 de
gr
ee
s
1 degree
overlap
+ / - 1 degree
vertical offset