The current study aims at assessing the efficacy and safety of oral Gabapentin alone versus Diclofenac Potassium drugs for postoperative analgesia in patients undergoing surface ablation.

To estimate the analgesic effect and pain severity after surface ablation with oral Gabapentin intake in comparison with Diclofenac Potassium, where Gabapentin could be a better analgesic medication after surface ablation

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

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