<prompt> A child presents with night blindness, delayed dark adaptation. Which investigation is to be done fuher to confirm the diagnosis?Dark adaptometryERGEOGRetinoscopy  <response>: Retinitis pigmentosa APOPTOSIS OF RODS AUTOSOMAL RESSECIVE AUTOSOMAL DOMINANT X LINKED - WORST PROGNOSIS CF NYCTALOPIA RING SCOTOMA TUBULAR VISION OE- TRIAD PALE WAXY DISC ARETRIOLAR ATTENUATION BONE SPICULE PIGMENTATION MOST CHARACTERISTIC Gold standard for Dx - ERG EOG - Gold standard for best diseaseRetinoscopy - differentiate between type of refractive error 