As a general rule of thumb, LASIK can correct prescriptions of:
â—‰ Myopia up to -10.00 dioptres
â—‰ Hyperopia up to +5.00 dioptres
â—‰ Astigmatism up to -5.00 dioptres
For patients who fall outside of these ranges, other refractive surgery options may still be available such as PRK, SMILE®, or ICL procedures.
Despite having a prescription within the treatable range of LASIK, some patients will still not be suitable for refractive surgery. These are usually patients with eye conditions, such as keratoconus or corneal scarring, that may be exacerbated during the surgical procedures. Other patients who may be best to avoid LASIK are those whose poor vision is due to an underlying eye disease rather than refractive error. Such diseases include eye cataract, macular degeneration, and lazy eye.