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Astigmatism decay immediately following suture removal
T Potamitis1, M Fouladi, F Eperjese
1Department of Ophthalmology, University of Birmingham, Birmingham and Midland Eye Centre, UK.
Eye (London, England)
|January 1, 1997
Summary
Post-operative astigmatism changes rapidly after suture removal, with significant shifts occurring within 30 minutes. Early keratometry can guide temporary spectacle correction and predict long-term outcomes.
Area of Science:
- Ophthalmology
- Corneal Surgery
- Refractive Error Management
Background:
- High post-operative astigmatism is a common complication after cataract surgery.
- Extracapsular cataract surgery can lead to significant corneal curvature changes.
- Suture removal timing impacts visual recovery and refractive outcomes.
Purpose of the Study:
- To assess corneal astigmatism changes after suture removal in extracapsular cataract surgery patients.
- To compare early keratometry measurements (30 minutes post-suture removal) with later measurements (2 weeks).
- To evaluate the utility of early measurements for guiding patient management.
Main Methods:
- Prospective study of 34 patients with high post-operative astigmatism.
- Keratometry performed at 30 minutes post-suture removal and again at 2 weeks.
- Analysis of astigmatism changes and correlation with initial measurements.
Main Results:
- Greatest astigmatism change (mean 3.63 D) occurred within 5 minutes of suture removal.
- Mean change between 15-30 minutes was 0.56 D, with a further 1.29 D change by 2 weeks.
- Patients with >3.00 D astigmatism at 30 minutes often retained significant astigmatism at 2 weeks.
Conclusions:
- Keratometry at 30 minutes post-suture removal is moderately predictive of 2-week astigmatism.
- Early refraction is not yet stable for routine use but may aid in specific cases (e.g., monocular patients).
- 30-minute keratometry can help determine the need for further suture removal and facilitate early discharge planning.