Summary

Assessment of visual functions at low contrast adds an important dimension to the evaluation of a person’s capabilities. It should be a part of evaluation of vision in occupational health and in low vision services as well as in all diagnostic work. With the easy to use optotype tests, it is possible to assess visibility of low contrast details. A person’s ability to see low contrast lines requires grating tests, which are now available as printed tests and in several computer-based tests. When using grating tests, the tester should be aware of the size of the grating s an important variable and the effect of scotomas on the results.