Fig. 24. Hertz flicker multifocal results from a patient with Stargardt's disease. A. Raw data. B. Numerical results from rings representing distance from the fovea. Note that as in the Stargardt's patient in Figure 23, the central responses are nonrecordable or greatly reduced. (Used with permission of Roland Consult, Wiesbaden, Germany: http://www.roland-consult.de.)