@misc{indiciaef15c47dd3ca9,
  title = {Defining mean visual acuity.},
  author = {L S Evans},
  year = {1992},
  doi = {10.1016/s0002-9394(14)71546-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/1550199/},
  note = {Source identifier: 1550199}
}