Anterior uveitis after transepithelial photorefractive keratectomy: Demographics and clinical characteristics - a one-year analysis.

Abstract

To report a case series of anterior uveitis after Transepithelial Photorefractive Keratectomy (TransPRK) and determine its incidence, demographics and associated clinical features over a study period of 1 year. This retrospective case series comprised of 200 eyes (100 patients) which underwent elective TransPRK surgery for ametropia correction at a tertiary eye care center by two refractive surgeons over 1 year. TransPRK was performed on Streamlight software (EX500, Alcon Wavelight, Inc.). Postoperatively, all patients received topical antibiotic and steroid eye drops and tapered over 4 weeks. The mean age of study patients was 25.76 ± 4.29 years with a pre-operative mean refractive spherical equivalent (MRSE) of -3.49 ± 2.12 diopter (D); 11.76% eyes had simple myopia and 88.23% had compound myopic astigmatism, mean ablation depth of 61.99 ± 24.27 um. Four patients (seven eyes) developed anterior uveitis with mean age of 25 ± 3.53 years, mean MRSE -2.91 ± 0.32 D, ablation depth 44.75 ± 5.29 um with a mean onset at 33.28 days postoperatively after surgery and 5.28 days after the routine postoperative topical steroid withdrawal. Laboratory and immunological tests were negative in all four patients. The incidence of TransPRK-related anterior uveitis was 3.5% over 1 year. Anterior uveitis after TransPRK is infrequent. It could be due to intraocular transmittance of high frequency excimer laser beams used for longer durations to provide continuous, single step ablation in this novel type of PRK surgery. Further studies are needed to investigate the mechanisms of this association.