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142050 Ophthalmology

A young man presented to you with night blindness and tubular vison. On examination the findings are IOP is 18mm, normal anterior segment, fundus examination shows waxy, pallor of disc, attenuation of aeriole, bony corpuscles like spicules of pigmentation in midperipheral retina. Perimetry test shows a ring scotoma with subnormal ERG. What is the your most likely diagnosis?

APrimary closed angle glaucoma
BPigmented retinal dystrophy
CLattice degeneration of retina
DPaving stone degeneration of retina
Ophthalmology
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