@misc{indiciae75b39db460e3,
  title = {Difficult lens power calculations.},
  author = {Achim Langenbucher and Wolfgang Haigis and Berthold Seitz},
  year = {2004},
  doi = {10.1097/00055735-200402000-00002},
  url = {https://pubmed.ncbi.nlm.nih.gov/14743011/},
  note = {Source identifier: 14743011}
}