@misc{indiciae28fdcb684c00,
  title = {Frequency doubling perimetry using a liquid crystal display.},
  author = {P G Spry and M L Gibbs and C A Johnson and D L Howard},
  year = {2001},
  doi = {10.1016/s0002-9394(00)00803-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/11239865/},
  note = {Source identifier: 11239865}
}