@misc{indiciae6a9a4b1d068a,
  title = {3M diffractive multifocal lens.},
  year = {1991},
  doi = {10.1016/s0886-3350(13)80258-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/2040985/},
  note = {Source identifier: 2040985}
}