<prompt> Most characteristic finding of retinitis pigmentosa a Ring scotomab Peripheral field defectc Central scotomad Diplopiaacaadab  <response>: Ring scotoma is a peripheral field defect, which is characteristic finding of retinitis pigmentosa.Peripheral vision loss is hallmark of retinitis pigmentosa, with the classic ring scotoma 30 -50 degree from fixation __ Pediatric retina by Hartnett.The ring scotoma is the characteristic field defect of retinitis pigmentosa. Harleys pediatric ophthalmology 