@misc{indiciae7b34247a34b3,
  title = {[Determining visual acuity].},
  author = {E Hartmann},
  year = {1987},
  doi = {10.1055/s-2008-1050468},
  url = {https://pubmed.ncbi.nlm.nih.gov/3657017/},
  note = {Source identifier: 3657017}
}