J Cataract Refract Surg
February 2016
Purpose: To investigate the long-term efficacy of hyperopic photorefractive keratectomy (PRK).
Setting: University Hospital, London, United Kingdom.
Design: Prospective case series.
Purpose: To determine long-term efficacy and safety of riboflavin/ultraviolet A corneal cross-linking (CXL).
Design: Prospective cohort study.
Methods: Thirty-six patients (36 eyes) who underwent epithelium-off CXL at a University Hospital (Guy's and St Thomas' National Health Service Foundation Trust) 6-8 years previously were examined.