@misc{indiciae0e225cb586b7,
  title = {Optics and visual physiology.},
  author = {I M Siegel},
  year = {1973},
  doi = {10.1001/archopht.1973.01000050329019},
  url = {https://pubmed.ncbi.nlm.nih.gov/4201021/},
  note = {Source identifier: 4201021}
}