Yes, LASIK should not be done on patients with keratoconus. In some patients, the cornea is too thin to perform LASIK. LASIK cannot be performed on a patient who has an active eye disease. LASIK can be performed on a patient with diaetes, but not a patient with active diabetic retinopathy. Active autoimmune disease such as lupus or rheumatoid arthritis, because it affects healing, is a contraindication to LASIK surgery. LASIK cannot be done while on Cordarone or Accutane.