@misc{indiciae42c0fab8bb22,
  title = {Variable power phase lenses.},
  author = {Charles E Campbell},
  year = {2005},
  doi = {10.1364/ao.44.003438},
  url = {https://pubmed.ncbi.nlm.nih.gov/16007839/},
  note = {Source identifier: 16007839}
}