The primary aims of this study are to determine if treatment with Gabapentin taken systemically (oral tablets) in patients who have photorefractive keratectomy (PRK) surgical treatments reduces post surgical neuropathic pain and discomfort. The investigators main Hypothesis is that gabapentin given prior to and after refractive surgery prevents central sensitization and local allodynia.
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Pain at moment of examination
Timeframe: 24 hours postoperatively
Average pain for the previous 24 hour period,
Timeframe: assesed at 24 hours
Maximum pain intensity for the previous 24 hour period
Timeframe: Assesed at 24 hours postoperatively
Pain at moment of examination
Timeframe: 48 hours postoperatively
pain on examination
Timeframe: 72 hours postoperatively
pain on examination
Timeframe: 96 hours ostoiperatively
Pain at moment of examination
Timeframe: postoperative day 7
Average pain for the previous 24 hour period
Timeframe: Assesed at 48 hours
Average pain during the previous 24 hour period
Timeframe: Assesed at 72 hours postoperatively
Average pain for the last 24 hours period
Timeframe: Assesed at 96 hours postoperatively
Average pain since last examination
Timeframe: Assesed on postopertive day 7
Maximum pain intensity for the previous 24 hour period
Timeframe: Assesed at 48 hours postoperatively
Maximum pain intensity for the previous 24 hour period
Timeframe: Assesed at 72 hours postoperatively
Maximum pain intensity for the last 24 hour period
Timeframe: Assesed at 96 hours postoperatively
Maximum pain intensity since the last examination
Timeframe: Assesed on the 7th postoperative day