PION786 FOR DUMMIES

VEP latency of 30 msec or more is normally indicative of retrobulbar neuritis in lieu of PION [20]. PION is much more likely to induce a reduction in amplitude of VEP and is a lot more likely to be everlasting and irreversible modifications as compared to optic neuritis. Note that in both of those retrobulbar neuritis and PION ancillary studies suc