Zeiss Humphrey II-i series - Peripheral Testing Limits; Presenting a Stimulus Along a Meridian

Kinetic Testing
Humphrey Field Analyzer II- i series User Manual 2660021145640 A
13-8
Peripheral Testing Limits
The projection system has limits on how far out it can pr
oject a light stimulus. The following graph
shows the projector’s limitation when using the 80° field size:
••
••
•
•
•
•
•
•
•
•
75º
75º
75º
75º
66º
66º
49º
49º
42º
62º
62º
60º
270º
300º
330º
0º
30º
60º
90º
120º
150º
180º
210º
240º
Figure 13.1 Peripheral 80° Testing Limits for Selected Meridians
Presenting a Stimulus Along a Meridian
When activated, the HFA II-
i will display the stimulus inside the bowl for one second at the starting
point of the chosen meridian. It then will begin moving the stimulus toward fixation and into the
patient’s field of vision. If the patient does not respond by the time the stimulus reaches the central
fixation point, the light will turn off and the instrument will beep.
Note: The first stimulus of each isopter will be delayed
longer than the one second
described above.
This is because the HFA II-
i is verifying the stimulus before beginning the isopter.