Retinal nerve fiber layer
El‑Kattan, M. M., S. M. Esmat, E. H. Esmail, H. A. Deraz, and R. S. Ismail,
"Optical coherence tomography in patients with Parkinson’s disease",
The Egyptian Journal of Neurology, Psychiatry and Neurosurgery, vol. 58, issue 21, pp. 1-8, 2022.