Vertical gaze abnormalities, especially upgaze |
Downward gaze preference or tonic downward deviation of the eyes ("setting-sun sign") |
Primary position upbeat or downbeat nystagmus |
Impaired convergence and divergence |
Excessive convergence tone |
Convergence-retraction nystagmus |
Skew deviation, often with the higher eye on the side of the lesion |
Alternating adduction hypertropia or alternating adduction hypotropia |
Bilateral upper eyelid retraction (Collier "tucked-lid" sign) |
Bilateral ptosis |
Pupillary abnormalities (large with light-near dissociation) |
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