| Name | Info | Provider | Link |
|---|---|---|---|
| Refractive Errors | free resource | MedlinePlus Health Information | https://medlineplus.gov/refractiveerrors.html |
| free resource | PubMed Central | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/38386347/ | |
| free resource | Europe PubMed Central | https://europepmc.org/abstract/MED/38386347 | |
| free resource | Silverchair Information Systems | https://tvst.arvojournals.org/article.aspx?doi=10.1167/tvst.13.2.17 |