Fig. 2

The stimulus array and the nasal to temporal amplitudes ratio obtained from multifocal electroretinograms (mfERGs). a The pattern of the 37-hexagon stimulus array with circles indicating radii of 5°, 10°, 15° and 20°in right eye. b The measurements of the first slice of the second-order kernels obtained from multifocal electroretinograms (mfERGs). The first positive peak, P1 amplitude was measured. c We separated the hexagons and averaged them according to the temporal (orange color) nasal (red color) hemispheres. We used the ratio of the amplitudes of the mfERGs of the nasal to the temporal hemisphere within the central 5° (N/T) to evaluate the asymmetry