@misc{indiciaeb8c6e547098d,
  title = {Ray-tracing for physiological optics-a tutorial.},
  author = {W Wiitanen},
  year = {1977},
  doi = {10.1016/0010-4825(77)90006-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/844295/},
  note = {Source identifier: 844295}
}