@misc{indiciae15c91dedfa7c,
  title = {ABC of eyes. Refractive errors.},
  author = {A R Elkington and P T Khaw},
  year = {1988},
  doi = {10.1136/bmj.297.6642.192},
  url = {https://pubmed.ncbi.nlm.nih.gov/3044510/},
  note = {Source identifier: 3044510}
}