highly significantP < 0.006
Age, best-corrected visual acuity, and intraocular pressure did not differ significantly between RP patients and healthy controls ( P > 0.05), whereas there was a highly significant difference with regard to visual field parameters, MD ( P < 0.006) and PSD ( P < 0.001) and ERG; indeed, RP had peripheral visual field defects and decreased b-wave and a-wave amplitude compared to controls ( P < 0.002 and P < 0.019, resp.).