I believe that thin corneas are a contraindication. Another possibility for correcting astigmatism is a toric IOL. With your degree of astigmatism, one study showed that this option eliminated slightly more astigmatism than LRIs.
contraindications might include scarred corena, keratoconus, active infection, history of herpes simplex, astigmatism less than 1 diopter or large amounts, or a patient that didn't want the procedure.
JCH MD