Fig. 1
From: Macular structural integrity estimates are associated with Parkinson’s disease genetic risk
Spectral Domain optical coherence tomography scans centred on the disc (left) and macular (right). The 3.5 mm-diametre disc-centred B-scan obtains measurements of the peripapillary retinal nerve fibre layer thickness. The 31-slice macular-centred scans cover a 6-mm diameter area