elektron eye technology Henson 9000, Manual, Page: 22 / 155

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Hens o n 9000 Per imeter Us er M a nua l
E l e k t r o n E y e T e c h n o l o g y 2 0 1 8
3 .1 .1 .1 P atien t in stru c tion s
It is important that the patient understands what they need to do during the test.
Below is a set of instructions that we have found work well.
The eye not being tested should be occluded and the test eye must be correctly aligned with
the patient sitting comfortably.
Threshold set by age
The test is going to take about 2 minutes.
You must look at the central red light and keep your eye as still as possible.
The technician is going to present patterns of 2, 3 or 4 light spots.
Not all of the spots will be the same intensity.
After each presentation he/she will ask you how many you saw.
The technician may ask you where you saw the lights.
Add when setting the threshold by measurement
To begin with, the lights will be fairly bright.
They will then get dimmer and dimmer until they cannot be seen.
You should not guess. If unsure it is advisable to say "none".