Editing Progressive supranuclear palsy (section)

===== Ocular Symptoms in PSP-RS =====
A defining feature of PSP-RS is vertical supranuclear gaze palsy, which is difficulty with voluntary downward gaze.<ref name=":9">{{Cite journal |last1=Krzosek |first1=Patrycja |last2=Madetko |first2=Natalia |last3=Migda |first3=Anna |last4=Migda |first4=Bartosz |last5=Jaguś |first5=Dominika |last6=Alster |first6=Piotr |date=2022-02-09 |title=Differential Diagnosis of Rare Subtypes of Progressive Supranuclear Palsy and PSP-Like Syndromes—Infrequent Manifestations of the Most Common Form of Atypical Parkinsonism |journal=Frontiers in Aging Neuroscience |volume=14 |doi=10.3389/fnagi.2022.804385 |doi-access=free |pmid=35221993 |pmc=8864174 |issn=1663-4365}}</ref> Vertical supranuclear gaze palsy, a symptom characterized by decreased velocity and amplitude of vertical eye movements (saccades) is often the prominent diagnostic feature of PSP-RS. Approximately 40% of patients with PSP-RS experiencing supranuclear gaze palsy, but it may not present until 3–4 years after disease onset.<ref name=":0" /><ref name=":9" /> Individuals with PSP-RS also display other ocular motor symptoms such as dry, red and sore eyes, blurred vision, and difficulty focusing.<ref name=":7" /> They may also experience spontaneuous and involuntary eye-lid closure or apraxia of the eyelid opening.<ref name=":7" />