Is diabetic retinopathy a risk factor for Parkinson’s disease development?

Takeaway

  • Diabetic retinopathy was not associated with incident Parkinson’s disease (PD) in a large Danish register-based cohort study.

Why this matters

  • An association between diabetic retinopathy and PD has previously been proposed, as diabetic retinopathy has also been shown to involve abnormal dopaminergic signaling.

  • This study does not support diabetic retinopathy being an independent risk factor for PD.