@misc{indiciae838e6530bf03,
  title = {The gradient filter test to assess amblyopia.},
  author = {R V Keech and P J Kutschke},
  year = {1990},
  doi = {10.1016/s0002-9394(14)76938-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/2368821/},
  note = {Source identifier: 2368821}
}