The study is designed to demonstrate the safety and efficacy of two dose concentrations of SAF312 eye drops (dose 1 [5 mg/ml] and dose 2 [15 mg/ml]) in subjects with chronic induced corneal pain (CICP) persisting at least for 4 months after refractive surgery and chronicity confirmed during the observational period. The study will also determine the optimal dose to carry forward for further development.