@misc{indiciaeb8146eb7773b,
  title = {Analysis of accommodation function with ultrasonography.},
  author = {A P Beers and G L van der Heijde},
  doi = {10.1007/bf02583270},
  url = {https://pubmed.ncbi.nlm.nih.gov/9181326/},
  note = {Source identifier: 9181326}
}