Topography-guided photorefractive keratectomy combined with accelerated corneal collagen cross-linking versus cross-linking alone for progressive keratoconus: a long-term prospective cohort study - Zhihao Dai; Ziyuan Liu; Yu Zhang; Yufei Yuan; Yan Liu; Yuexin Wang; Shuo Yu; Yueguo Chen (Frontiers in Medicine, 2024)