Downbeat nystagmus in primary position and oscillopsia resulted from nutritional deficiency during prolonged intravenous therapy of a patient with hyperemesis gravidarum. Wide bandwidth infrared oculography demonstrated a pseudocycloid nystagmus waveform with an increasing-velocity exponential slow phase. Because the oscillopsia decreased and the nystagmus was damped with convergence, visual acuity improved with the addition of base-out prisms to each spectacle lens.

No abstract

The involved pupil in the syndrome of aberrant regeneration of the oculomotor nerve usually remains larger than the uninvolved side, or approaches equality in size. A 4-year-old child was seen with congenital aberrant regeneration of the right third nerve. The right pupil was consistently smaller than the left, but particularly so in dim illumination. The question can be raised as to whether relative pupillary miosis more commonly follows third nerve misdirection in children than adults.

No abstract