@misc{indiciae4f0ee6e9ed7a,
  title = {Improving visual perception in older observers.},
  author = {K Ball and R Sekuler},
  year = {1986},
  doi = {10.1093/geronj/41.2.176},
  url = {https://pubmed.ncbi.nlm.nih.gov/3950343/},
  note = {Source identifier: 3950343}
}