@misc{indiciae4a947ffc98e5,
  title = {Optical aids and their application.},
  author = {F Fankhauser and P Rol and S Kwasniewska},
  year = {1990},
  doi = {10.1097/00004397-199030020-00010},
  url = {https://pubmed.ncbi.nlm.nih.gov/2185174/},
  note = {Source identifier: 2185174}
}