ArticlePloS one2024
Corneal steep island formation after primary pterygium surgery.
Article in PloS one, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Optimal Time for Stabilization of Anterior Corneal Keratometry after Primary Pterygium Excision Adjusted for Horizontal Invasion Length.Korean journal of ophthalmology : KJO · 2026Article
- Effect of Subepithelial Pterygium Pedicle Length on Anterior Corneal Keratometry and Wavefront Aberrations.Korean journal of ophthalmology : KJO · 2026Article
- Association between Fibrovascular Translucency of Pterygium and Corneal Curvature and Aberrations after Adjustment for Horizontal Invasion Length.Korean journal of ophthalmology : KJO · 2026Article
- Exploring the impact of extraocular disorders and their surgical correction on corneal astigmatism and higher-order aberrations: a comprehensive review.Therapeutic advances in ophthalmologyReview
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2 authors.
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Abstract
aimsThis study aimed to report corneal steep island (CSI) formation following primary pterygium surgery and to identify preoperative pterygium morphological features that predict the likelihood of CSI.
methodsA total of 93 eyes from 84 subjects with primary nasal pterygium, who underwent pterygium excision combined with conjunctival-limbal autograft, were included in this retrospective longitudinal cohort study. CSI was defined using anterior segment swept-source optical coherence tomography (AS SS-OCT). Eyes were divided into two groups: those with postoperative CSI formation (Group 1) and those without postoperative CSI (Group 2). We compared postoperative anterior corneal astigmatism (ACA, in diopters [D]) and root mean square (RMS) values of anterior corneal lower-order (LoA) and higher-order aberrations (HoA) between the groups. Baseline clinical severity grades of pterygium based on the pre-established pterygium body morphology and vascularity, ACA, and AS SS-OCT-guided pterygium morphological profiles (horizontal invasion length [HIL, mm], height [μm], thickness (μm), and residual corneal thickness [RCT]/central corneal thickness [CCT] ratio [RCT/CCT]) were also compared.
resultsPostoperative CSI occurred in 26 eyes (28.0%) with a maximum follow-up duration of 22.9±27.4 months. Group 1 exhibited significantly higher postoperative anterior corneal RMS LoA and HoA, as well as the RMS values of the 4th to 6th orders. Although clinical severity grades of pterygium did not differ between groups, baseline ACA was higher in Group 1 (4.56±5.49 D vs. 2.70±3.80 D, P = 0.009). HIL (4.49±0.84 mm vs. 3.77±1.29 mm, P = 0.010) was higher in Group 1, while pterygium height (930.8±84.4 μm vs. 999.3±128.0 μm, P = 0.015) and RCT/CCT ratio (1.07±0.13 vs. 1.14±0.16, P = 0.049) were lower in Group 1.
conclusionsCSI may develop after primary pterygium surgery, particularly in patients with relatively higher preoperative ACA, longer HIL, and shorter height. Given that CSI can significantly increase both lower and higher-order aberrations, it is crucial to anticipate CSI probability and inform patients before surgery.
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