Visionix VX22NP - How Do I Use Contrast Tests; How Do I Use the Contrast of Optotypes; How Do I Use Regan Test (FSC)

VX22NP-VX22LP-VX22CP User Manual
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5.5. How do I use contrast tests?
1. How do I use the contrast of optotypes?
➢ See Change the contrast page 33.
2. How do I use Regan test (FSC)?
The Regan test is a sine-wave grating test. There are different levels of spatial
frequencies of wave (which represents different acuities) and contrast.
Call the test
➢ Press the button of the group with which the test is associated (1,2 or 3) untilte test
appears.
Explanation of the inforamtion bar
1/20 … 20/20 Indication of the number of the test
S: … Contrast sensibility (=1/C)
C: … Contrast (%)
D: … Distance (same distance than visual acuity test)
Orientation of the top of the waves
The orientation of the waves is always the same
Step
1
Orientation of the top of the waves
Left
Step
11
Orientation of the top of he waves
Vertical
2
Vertical
12
Left
3
Left
13
Right
4
Right
14
Vertical
5
Vertical
15
Right
6
Left
16
Left
7
Vertical
17
Right
8
Left
18
Vertical
9
Right
19
Vertical
10
Vertical
20
Left