@misc{indiciae64544665ff87,
  title = {Brightness changes during book retinoscopy.},
  author = {P B Kruger},
  year = {1977},
  doi = {10.1097/00006324-197710000-00004},
  url = {https://pubmed.ncbi.nlm.nih.gov/605923/},
  note = {Source identifier: 605923}
}