@misc{indiciae8c0bf0e68ae7,
  title = {Testing visual acuity.},
  author = {L Casellato},
  year = {1971},
  doi = {10.1136/bjo.55.1.44},
  url = {https://pubmed.ncbi.nlm.nih.gov/5551223/},
  note = {Source identifier: 5551223}
}