Clinical observation on the efficacy at the early stage of TPRK with assistance of smart pulse technology

Abstract

Objective To compare the efficacy at the early stage between smart pulse technology (SPT)-assisted transepithelial photorefractive keratectomy (TPRK) and traditional TPRK for correcting of myopia. Methods The data of 90 eyes of 45 cases with myopia were retrospectively analyzed. All cases were divided into two groups randomly. The smart group, 46 eyes of 23 patients, received SPT-TPRK. Contral group, 44 eyes of 22 patients, received traditional TPRK. All patients were followed up for 3 months. Results The stimulus syndrome of eye in the smart group was lighter than that in the TPRK group. After SPT-TPRK the visual acuity in the smart group was better than that at 1 and 3 days after surgery (P=0.000, 0.024). The difference in visual acuity was not statistically significant between the two groups at 10 days, 1 and 3 months after surgery(P=0.277, 0.504, 0.164). The differences of the surface regularity index (SRI) and surface asymmetry index(SAI)of topography in the two groups were statistically significant between preoperative and postoperative 3 months(P=0.090, 0.130, 0.126, 0.201). Conclusion After SPT-TPRK the stimulus syndrome is less serious and visual acuity is better at the early stage after surgery. Key words: Lasers, excimer; Keratectomy, photorefractive (PRK); Myopia; Technology, assisted, smart pulse