- Inflammation of the eye.
- Glaucoma or suspected glaucoma.
- Dry eye syndrome.
- If the refraction should not be stable for at least one year.
- Pregnant women.
- After cataract surgery.
- Suffering patient from degenerative (such as keratoconus) and autoimmun disease (such as lupul).
- Retinal disease.
- Some are disease, such as uveitis.
- Corneal infection.