Visual dysfunction is a better predictor than retinal thickness for dementia in Parkinson’s disease

Background Dementia is a common and devastating symptom of Parkinson’s disease (PD). Visual function and retinal structure are both emerging as potentially predictive for dementia in Parkinson’s but lack longitudinal evidence. Methods We prospectively examined higher order vision (skew tolerance and biological motion) and retinal thickness (spectral domain optical coherence tomography) in 100…

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