Figure 2. Phenotypic characterization of two members of a Dutch family. A: The upper portion presents the visual field printouts of the Goldmann perimetry (GP) test, and the lower part shows screenshots from Heidelberg Retina Tomograph II (HRT). The right and left column correspond to the right and left eye of individual IV:2, respectively. The small temporal black area in the GP corresponds to the physiologic blind spot. HRT scans demonstrate a physiologic optic disc cupping measure (red areas) and a physiologic thinned neuroretinal rim (blue-green area) of the optic disc. B: GP and HRT results for III:3 are shown. The large dark areas in the GP correspond to the enlarged blind spot due to optic neuropathy. HRT scans demonstrate increased optic disc cupping measure (red areas) and a thinned neuroretinal rim (blue-green area) of the optic disc.