@misc{indiciaea470d7ff6e5a,
  title = {An optical device with variable astigmatic power.},
  author = {J P Foley and C Campbell},
  year = {1999},
  doi = {10.1097/00006324-199909000-00025},
  url = {https://pubmed.ncbi.nlm.nih.gov/10498009/},
  note = {Source identifier: 10498009}
}