![]() This improves gaze stability, which is questionable in people with foveal vision loss. The person is asked to direct his/her gaze at what is perceived to be the center of a specially designed background pattern that looks like an eight-spoke wagon wheel. The person to be tested sits in front of a monitor, and the chin can be stabilized by a chin rest. The test consists of custom software that runs on IBM PC-compatible computers under any version of Windows (including Vista and Windows 7) and requires no hardware modifications. Topographic testing of remaining vision is important, because it assesses the function of retinal regions outside the fovea, where signs of trouble may appear first. There is a need for a simple topographic test of macular vision that does not require: If run at low contrast, the MMT is sensitive to subtle changes in retinal function, even if they are not evident yet. The MMT assesses remaining vision in people with macular and/or foveal vision loss, with the particular goal to find intact areas of the retina that can be used for eccentric viewing. What visual capacity has someone left to face the tasks of independent living? ![]()
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February 2023
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