| BFS | best-fit-sphere |
| CP | central pachymetry |
| FDA | Food and Drug Administration |
| FFKC | forme fruste keratoconus |
| IOP | intraocular pressure |
| KC | keratoconus |
| KCS | keratoconus suspect |
| LASEK | laser epithelial keratomileusis |
| L-LAK | laser asymmetric keratectomy |
| PRK | photorefractive keratectomy |
| SE | spherical equivalent |