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To the Editor:
The excellent review article by Biousse et al.1 reminded us of lessons learned from our mentor in neuro-ophthalmology and consummate educator, J. Lawton Smith from the Bascom Palmer Eye Institute of the University of Miami.
Smith listed 26 “Eye Signs in Parkinsonism” in his 1963 monograph on Optokinetic Nystagmus.2 These were manifestations of “parkinsonism” and not “Parkinson’s disease,” as Smith developed them before there was a clear distinction between the idiopathic and postencephalitic forms, and prior to the popularization of the “parkinson-plus syndromes,” such as progressive supranuclear palsy (PSP). Later, he published mnemonics (a characteristic Smith teaching strategy) of the signs.3,4⇓ The wording of the two mnemonics differed and we selected the wording that seemed most appropriate. We hope the readers of Neurology find it useful.
Ocular signs and symptoms of parkinsonism:
P—paresis …
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