Electronegative ERG

Loss of “b” wave in a dark adapted mixed rod-cone response

CSNB (Oguchi’s)

CRVO / acute CRAO

X-linked retinoschisis

Siderosis

Myotonic dystrophy

Duschenne muscular dystrophy

Batten disease

Quinine toxicity / methanol toxicity

MAR (melanoma-associated retinopathy / CAR (cancer-associated retinopathy)

Retinoschisis