ScholarWorks@중앙대학교

초록

To determine the corneal stabilization timeline after pterygium excision adjusted for horizontal invasion length (HIL). In this single-center retrospective cohort, we analyzed 88 eyes of 80 patients with nasal or temporal primary pterygium who underwent excision and perioperative evaluation with anterior segment swept-source OCT (AS SS-OCT, Anterion®). Anterior simulated mean keratometry (SimKmean; 3-mm ring) and HIL were measured on AS SS-OCT. Keratometric stabilization was assessed at postoperative cutoffs of 8, 12, 16, 20, and 24 weeks using analysis of covariance (ANCOVA) with HIL as a covariate. Subgroup analysis was performed after stratifying by the median HIL (3.82 mm). Mean anterior SimKmean increased from 42.95 ± 1.79 D preoperatively to 43.73 ± 1.53 D postoperatively (P < 0.001). Preoperative HIL correlated positively with the perioperative SimKmean change (r = 0.728 and P < 0.001). While postoperative duration showed no significant unadjusted correlation with keratometric change (r = -0.133 and P = 0.218), partial correlation controlling for HIL was negative (r = -0.248 and P = 0.021), indicating diminishing change over time after severity adjustment. ANCOVA demonstrated significant stabilization at 16 weeks (P = 0.036). In the HIL ≥ 3.82 mm subgroup, SimKmean change was greater before 20 weeks than after 20 weeks (1.73 ± 1.59 D vs 0.59 ± 0.74 D; P = 0.030), whereas no significant time-point differences were found for HIL < 3.82 mm. Corneal keratometric stabilization after pterygium excision depends on preoperative HIL. A minimum of 16 weeks is recommended before cataract surgery planning, with at least 20 weeks for eyes with HIL ≥ 3.82 mm.

키워드