@misc{indiciaef2693a7e32fc,
  title = {Practical contrast sensitivity acuity testing.},
  author = {R C Drews},
  year = {1989},
  doi = {10.1007/bf02028214},
  url = {https://pubmed.ncbi.nlm.nih.gov/2793317/},
  note = {Source identifier: 2793317}
}