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Incision Gape and Its Correlation with Surgically Induced Astigmatism in Subconjunctival Oblique Limbus Incision
Xin Fan1,2,3, Pinghong Lai4, Shaofen Yang5
1Department of Ophthalmology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, People's Republic of China.
Clinical Ophthalmology (Auckland, N.Z.)
|August 12, 2026
Summary
Incision gape after subconjunctival oblique limbus incision (SCOLI) cataract surgery is common and significantly impacts surgically induced astigmatism (SIA). Controlling incision gape may help manage SIA outcomes.
Area of Science:
- Ophthalmology
- Surgical Innovation
- Corneal Physiology
Background:
- Subconjunctival oblique limbus incision (SCOLI) is a surgical technique used in cataract extraction.
- Understanding factors influencing post-operative outcomes like surgically induced astigmatism (SIA) is crucial for patient vision.
- Incision gape, or the opening of the surgical wound, is a potential complication affecting visual results.
Purpose of the Study:
- To investigate the occurrence of incision gape following SCOLI cataract surgery.
- To quantify the relationship between incision gape and SIA.
- To explore the predictive capability of a theoretical model for incision gape.
Main Methods:
- Patients with pre-existing corneal astigmatism undergoing SCOLI were enrolled.
- Anterior segment optical coherence tomography (AS-OCT) measured actual incision gape (ΔG).
- A theoretical model predicted incision gape using keratometry and white-to-white distance; correlations were analyzed via regression and GEE models.
Main Results:
- A significant positive correlation was found between actual incision gape and SIA (R=0.392, p=0.026).
- Actual incision gape remained an independent predictor of SIA after adjusting for age and central corneal thickness (p<0.001).
- The theoretical incision gape model strongly correlated with both intraoperative and actual measured incision gape.
Conclusions:
- Macroscopic incision gape is a prevalent finding after SCOLI cataract surgery.
- Incision gape is a significant factor contributing to SIA.
- A mathematical model for predicting incision gape can aid in managing and potentially controlling SIA.
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