Contraindication of LASIK -
Patient selection criteria are:  Patients above 20 years of age,  Stable refraction for at least 12 months.  Motivated patient.  Absence of corneal pathology Reference : A K KHURANA OPHTALMOLOGY,Edition 4, Page-47
>20 year
Keratoconus
Normal cornea
Myopia of - 8D
Optics and refraction