Contrast Sensitivity test
This test is done to assess patient’s ability to appreciate contrast. Contrast acuity contributes a lot to patient’s problems.
Some will be able to perceive black print on white paper but may find it extremely difficult to pour milk in white cup.
Some may find contrast variations due to surrounding illumination.
A contrast sensitivity test is done with a Low Vision contrast sensitivity chart specially made for 1 meter recording.
If the contrast acuity is low
1. Higher than expected adds/magnifications are required.
2. Very poor contrast acuity patients may turn out to be dissatisfied ones.
3. They will need higher illumination.
4. May need typoscope or absorptive filters.
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