@misc{indiciae17cf3e9b6f54,
  title = {Age variations in normal human contrast sensitivity.},
  author = {G Derefeldt and G Lennerstrand and B Lundh},
  year = {1979},
  doi = {10.1111/j.1755-3768.1979.tb00517.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/525292/},
  note = {Source identifier: 525292}
}