@misc{indiciaea03dd03f42b8,
  title = {Fixation device for central field examination.},
  author = {H M Symons},
  year = {1967},
  doi = {10.1136/bjo.51.8.570},
  url = {https://pubmed.ncbi.nlm.nih.gov/6035962/},
  note = {Source identifier: 6035962}
}