<prompt> About Retinitis pigmentosa all are true EXCEPT:Night blindnessWaxy discEarly loss of central visionAttenuation of retinal vessels  <response>: ANSWER: C Early loss of central visionREF: khurana 4th ed p. 260-262Retinitis pigmentosaNight blindness is earliest featureDefective dark adaptationPartial or ring scotomaTubular visionLoss of central vision by age of 50-60 yearsFundus changesRetinal pigmentary changes typically perivascular and resemble bone corpuscles in shapeAttenuated or narrowed retinal arteriolesPale and waxy optic discs 