Clinical And Refractive Outcomes Of Transepithelial Photorefractive Keratectomy
Published 2024 - 42nd Congress of the ESCRS
Reference: PP26.09 | Type: Free paper | DOI: 10.82333/xxnw-1r60
Authors: Víctor Lázaro-Rodríguez* 1 , Eileen Guerrero 2 , Javier Reyes 2 , Mercè Martí 2 , Francesc Duch 2
1Refractive Surgery,Institut Català de Retina,Barcelona,Spain;Cornea,Hospital de la Santa Creu i Sant Pau,Barcelona,Spain, 2Refractive Surgery,Institut Català de Retina,Barcelona,Spain
Purpose
The purpose is to present our clinical and refractive outcomes of transepithelial photorefractive keratectomy (transPRK) in terms of functional and refractive results, as well as predictability, efficacy, safety and complications.
Setting
The sample population corresponded to patients that consulted for refractive surgery in the Refractive Surgery Department of Institut Català de Retina in Barcelona to whom transPRK was performed between 2019 and 2023. The treatment was performed with the WaveLight EX500 Streamlight laser.
Methods
A prospective non-randomized case-series study was performed on 1970 myopic eyes who had undergone transPRK. Corneal tomography, corneal biomechanics, corneal aberrations, intra-ocular pressure, uncorrected distance visual acuity (UDVA), uncorrected near visual acuity (UNVA), best corrected distance visual acuity (BCDVA), spherical equivalent (SE), sphere, cylinder and contrast sensitivity, were all evaluated. Minimum follow-up was three months.
Results
Mean SE decreased from -2,73 ± 1,01 D in a pre-operative stage to -0.03 ± 0.25 D three months after surgery. Mean sphere decreased from -2,55 ± 0,96 D preoperatively to 0,16 ± 0.26 D at three months postoperatively. Mean cylinder decreased from -0,54 ± 0,45 D in a pre-operative stage to -0.27 ± 0.28 D three months after surgery. Achieved UDVA increased from 0,13 ± 0,13 (decimal) preoperatively to 1.08 ± 0,14 (decimal) at 3 months postoperatively. BCDVA was 1.12 ± 0,10 (decimal) in a pre-operative stage and 1.13 ± 0,10 (decimal) three months after surgery. Safety was 100%. Efficacy was 95,5%. The predictability showed 97,5% of eyes within the target correction of less than ± 0.50 D SE.
Conclusions
TransPRK provided safe, efficacious and highly predictable clinical outcomes in treating low myopia. Results showed high quality uncorrected visual acuities. This technique facilitates patient collaboration and reduces surgical time. It allows adjusting the diameters of epithelial and refractive ablation, enabling controlled epithelial removal and regular edges. It is a highly technical surgery (non-contact) with minimal complications.