Purpose: To evaluate the effect of switching from preserved prostaglandin analog-timolol fixed combinations (PG-timolol FCs) to preservative-free latanoprost-timolol FC (PF-LT) on intraocular pressure (IOP), ocular surface health, and tolerability in glaucoma and ocular hypertension (OH) patients with the concurrent ocular surface disease (OSD). Methods: This was a longitudinal, prospective, interventional, real-life study among 42 patients. Up to 3 visits were planned, at baseline, 30, and 90 days to assess efficacy on IOP decrease and local tolerance. The severity of OSD symptoms [Ocular Surface Disease Index (OSDI) questionnaire], subjective drug tolerability [visual analog scale (VAS)], conjunctival hyperemia (McMonnies scale), and tear break-up time (TBUT) were the main parameters assessed. Results: Data from 36 patients were available for statistical analysis. IOP was significantly reduced at day 30 and day 90 compared to baseline (16 vs 14 vs 14 mmHg, p < 0.001). Significant improvement was demonstrated in OSD symptoms, signs, and VAS scores from the baseline to the second and third visits. Median OSDI (27.1 vs 9.6 vs 4.2, p < 0.001), conjunctival hyperemia (2 vs 1 vs 1, p < 0.001), corneal surface staining (p < 0.001), and conjunctival staining scores (p < 0.001), and the percentage of patients with eyelid and periocular hyperemia (61.1 vs 12.5 vs 2.8%, p < 0.001), significantly decreased. TBUT (4 vs 5 vs 6 s, p < 0.001) and VAS score regarding tolerability (5 vs 2 vs 1, p < 0.001) significantly increased. Conclusion: A switch from preserved PG-timolol FCs to PF-LT improved tolerability and optimized IOP control, providing better adherence with greater chances of treatment success.

Background and Objectives: The aim of this study is to evaluate and compare changes in corneal densitometry after standard (30 min exposure time of 3 mW/cm² UVA) and accelerated (10 min exposure time of 9 mW/cm² UVA) protocols of corneal cross-linking (CXL) in patients with progressive keratoconus. Materials and Methods: This study included a total of 38 eyes of 38 patients divided into two equal-sized subgroups. CXL was performed in one group according to the standard epithelium-off protocol (30 min, 3 mW/cm² UVA) and in the other group according to an accelerated epithelium-off protocol (10 min, 9 mW/cm² UVA). Scheimpflug imaging was used to evaluate corneal densitometry in the anterior, central, and posterior corneal layers in three concentric zones (0–2 mm, 2–6 mm, and 6–10 mm) at baseline and 1, 3, and 9 months after surgery. Results: This study included 38 patients divided into two subgroups of 19. One group of patients underwent standard and the other accelerated CXL protocol. Participants in the accelerated group were significantly older (p < 0.001). 9 months after CXL treatment, the accelerated group showed higher central and posterior corneal densitometry values, but, after adjusting for age and baseline values, ANCOVA analysis revealed no significant intergroup differences. Both protocols led to overall reductions in corneal densitometry over time. Conclusions: Both the standard and accelerated CXL protocols induce transient corneal haze, which can be objectified by increased corneal densitometry values in first three months post-CXL. The dynamics of the onset and recovery of postoperative corneal haze are comparable and similar in both protocols.