@misc{indiciaecd2df747648b,
  title = {Optical classification of keratoconus--final report.},
  author = {M G Poster and D N Gelfer and I Greenwald and J N Posner},
  year = {1969},
  url = {https://pubmed.ncbi.nlm.nih.gov/5262333/},
  note = {Source identifier: 5262333}
}