@misc{indiciae842e5885586a,
  title = {Perimetric threshold variability and age.},
  author = {A Heijl and G Lindgren and J Olsson},
  year = {1988},
  doi = {10.1001/archopht.1988.01060130492014},
  url = {https://pubmed.ncbi.nlm.nih.gov/3355411/},
  note = {Source identifier: 3355411}
}