Analysis of Retinal Nerve Layers in Idiopathic, LRRK2-associated Parkinson's Disease and Unaffected Carriers of G2019S Mutation.

•The peripapillary retinal nerve fiber layer of the retina is thinned in idiopathic PD.•In LRRK2-PD there seems to be minor or absent retinal thinning.•OCT might not to be useful to differentiate clinical or asymptomatic LRRK2-PD from healthy controls.