@misc{indiciae2605f08a8249,
  title = {Normal cup-to-disc ratio.},
  author = {E B Werner},
  year = {1991},
  doi = {10.1016/s0161-6420(13)30984-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/2023743/},
  note = {Source identifier: 2023743}
}