This is an observational longitudinal study in 4 cohorts of patients with Parkinsonian syndromes, who are visiting the Movement Disorders outpatient clinics. The aim of the study is to assess the difference of oculometric measures in different neurodegenerative brain conditions and their accuracy over time, and as compared to clinical diagnosis, in order to find a change over time, difference between subgroups and correlations with accepted clinical endpoints in subjects who meet the inclusion criteria and who provide a signed Informed Consent.
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Change of saccadic latency between subgroups
Timeframe: 12 months
Change of antisaccadic error rate between subgroups
Timeframe: 12 months
Change of saccadic latency over time as evaluated during visits
Timeframe: 12 months
Change of antisaccadic error rate over time as evaluated during visits
Timeframe: 12 months
Correlation between MDS-UPDRS score and its parts with saccadic latency
Timeframe: 12 months
Correlation between UMSARS score and its parts with saccadic latency
Timeframe: 12 months
Correlation between PSP-CDS and its parts with saccadic latency
Timeframe: 12 months