PMC6079493_01
Full field electroretinography (ffERG), multifocal electroretinography (mfERG), and visual field testing of case 1. (a) Full field electroretinography demonstrated low normal a- and b-wave amplitudes and implicit times on scotopic testing. Photopic testing showed moderately reduced a- and b-wave amplitudes with mildly delayed implicit times. See Supplementary Figure 1 for normal reference and ffERG for cases 2 and 3. (b) Central amplitudes were reduced in the central and paracentral 15  with relative sparing of the fovea on multifocal electroretinography. See Supplementary Figure 2 for normal reference and mfERG testing for cases 2 and 3. (c) Humphrey Sita-Standard protocol with size III stimulus revealed bilateral dense paracentral scotomas that spared foveal sensitivities. See Supplementary Figure 3 for visual field testing of cases 2 and 3.
JOPH2018-2984934.001.jpg
PMC6079493_01_JOPH2018-2984934.001.jpg
fig1
A 57-year-old Caucasian male presented with a ten-year history of nonprogressive ring scotomas OU (Figure 1).
PMC6079493_02
PMC6079493_03