@misc{indiciaed5036777f3d4,
  title = {Ray tracing through a toric refracting surface.},
  author = {G A Fry and D S Loshin},
  year = {1975},
  doi = {10.1097/00006324-197504000-00003},
  url = {https://pubmed.ncbi.nlm.nih.gov/1130489/},
  note = {Source identifier: 1130489}
}