@misc{indiciae7085d438ba52,
  title = {Optics and visual physiology.},
  author = {I M Siegel},
  year = {1971},
  doi = {10.1001/archopht.1971.01000010102020},
  url = {https://pubmed.ncbi.nlm.nih.gov/4327176/},
  note = {Source identifier: 4327176}
}