@misc{indiciae9b66607bc262,
  title = {Hand-held applanation tonometer.},
  author = {E S Perkins},
  year = {1965},
  doi = {10.1136/bjo.49.11.591},
  url = {https://pubmed.ncbi.nlm.nih.gov/5849423/},
  note = {Source identifier: 5849423}
}