Comparative Analysis Of Visual And Refractive Outcomes Between Transepithelial Photorefractive Keratectomy (Tprk) And Laser-Assisted In Situ Keratomileusis (Lasik) Procedures In A New Refractive Surgery Center
Published 2024 - 42nd Congress of the ESCRS
Reference: PO1259 | Type: Free paper | DOI: 10.82333/pvzz-jj46
Authors: Subashini Kaliaperumal* 1 , Igam Kamki 1 , Ramesh Babu 1 , Geeta Behera 1 , Sandeep Devan 1 , Aarthy G 1 , Aji Devadas 1
1Ophthalmology,JIPMER,Pondicherry,India
Purpose
To study and compare the visual and refractive outcomes in LASIK and TPRK.
Setting
Planning station of Barraquer Laser refractive centre, Department of Ophthalmology,JIPMER, Pondicherry, India
Methods
Patients aged between 18-40 years with myopia or myopic astigmatism from −1.00 to −10.00D were included in the study. LASIK was considered if corneal curvature was between 42 and 47, manifest refraction was > 1 D spherical equivalent, Schirmer’s > 10 mm, Tear Break Up Time (TBUT) > 7 seconds, and corneal thickness > 490 microns. Trans PRK was done if subjects required this procedure based on their occupation and job requirements and those deemed unfit for LASIK. LASIK and Trans PRK were performed using Excimer laser (EX500, Wavelight, Alcon). The primary outcome measures were uncorrected distance visual acuity (UDVA) measured in Log MAR units and TBUT at 1 week,1 month, 3 months, and 6 months and complications during 6 months of follow-up.
Results
Data from 28 patients (56 eyes) each who underwent TPRK and LASIK were analyzed. The mean preoperative spherical equivalent was -4.558 ± 1.985D for TPRK and -3.850 ± 1.700 D for LASIK (p=0.425). UCVA at 1 week postop was significantly better in LASIK eyes compared to TPRK eyes (0.006 ± 0.085 vs 0.042 ± 0.085) However,at 6 months,the mean UCVA improved to 0.003 ± 0.036 in TPRK which was better than that in LASIK eyes (-0.035 ± 0.04, p=0.587). TBUT reduced from preoperative values of 10.107 ± 2.985 (TPRK) and 9.142 ± 3.17 (LASIK) at 1 week, 1 month, and 3 months postop but came to preop levels at 6 months. There was one case of free cap and 2 cases of flap striae requiring flap ironing in LASIK. Transient IOP rise was seen in TPRK eyes.
Conclusions
Both TPRK and LASIK demonstrated good visual outcomes without loss of lines.
TPRK showed comparable visual outcomes to LASIK. Both procedures were deemed safe, with complications managed effectively. TBUT stabilized to preoperative levels by 6 months in both groups.