Assessment of Safety and Efficacy of Gabapentin After Surface Ablation, a Case Control Experimental Study

Inclusion Criteria: * patients over 18 years old * preoperative stable refraction for at least one-year, * normal corneal tomography with expected postoperative flat K reading not less than 38D, and postoperative residual stromal bed not less than 350 μm. Exclusion Criteria: * Patients with preoperative corrected distance visual acuity (CDVA) of worse than 20/30 * amblyopic patients, * patients with a history of previous ocular surgeries, * herpetic eye infection, or corneal dystrophies. * Patients with other ocular conditions e.g. uveal or retinal diseases, and glaucoma * Diabetics, * Hypertensives, * Kidney problems, * breathing problems * Adults older than 65 years. * Previous allergy or adverse reaction to the used drugs. * History of drug abuse or alcohol abuse problems * History of mood problems, depression suicidal thoughts or behavior