An Analysis of Human Visual Receptive Fields Using the Perimetric Method

Detection of visual field defects in pre-perimetric glaucoma using fundus-oriented small-target perimetry

“…In contrast, the hitting possibility will be reduced when smaller targets are used. A target size of 2.9 min is smaller than the receptive field of ganglion cells [20] and may detect visual field defects caused by a gap in the receptive field, which may not be detected by conventional perimetry. Thus, we hypothesized that fundus-oriented perimetry using a small target and test points spaced more closely together may be useful in detecting early glaucomatous visual field abnormalities.…”

“…We used a target size of 2.9 min in our perimetry. Receptive fields of ganglion cells overlap in the normal retina, and the gaps appear when the density of the receptive fields of ganglion cells is reduced to less than 50 % as assessed by both psychophysical experiments [19] and computer simulations [20]. Even when reduced to 10 %, large targets hit some receptive fields.…”