Variable abnormality of the melanopsin-derived portion of the pupillary light reflex (PLR) in patients with Parkinson's disease (PD) and parkinsonism features.
Bruce I GaynesAdnaan ZafferRaman YousefzaiMario Chazaro-CortesKalea CollettaSandra L KletzelMary Beth JostYoungsook ParkJasvinder ChawlaMark V AlbertTing XiaoPublished in: Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology (2021)
ipRGC deficit is demonstrated in PD subjects; however, the degree and constancy of abnormality appear variable.
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