ArticleKorean journal of ophthalmology : KJO2026
Optimal Time for Stabilization of Anterior Corneal Keratometry after Primary Pterygium Excision Adjusted for Horizontal Invasion Length.
Article in Korean journal of ophthalmology : KJO, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeTo determine the corneal stabilization timeline after pterygium excision adjusted for horizontal invasion length (HIL).
methodsIn this single-center retrospective cohort study, we analyzed 88 eyes of 80 patients with nasal or temporal primary pterygium who underwent excision and perioperative evaluation with anterior segment (AS) swept-source optical coherence tomography (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).
resultsMean anterior SimKmean increased from 42.95 ± 1.79 diopters (D) preoperatively to 43.73 ± 1.53 D postoperatively (p < 0.001). Preoperative HIL correlated positively with the perioperative SimKmean change (r = 0.728, p < 0.001). While postoperative duration showed no significant unadjusted correlation with keratometric change (r = -0.133, p = 0.218), partial correlation controlling for HIL was negative (r = -0.248, 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.
conclusionsCorneal 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.
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