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Diffuse lamellar keratitis: incidence, associations, outcomes, and a new classification system
J D Johnson1, M Harissi-Dagher, R Pineda
1Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts 02114, USA.
Journal of Cataract and Refractive Surgery
|November 1, 2001
Summary
Diffuse lamellar keratitis (DLK) occurred in 1.3% of LASIK eyes, with epithelial defects increasing risk. Type II DLK showed longer resolution times and higher visual acuity loss risk compared to Type I.
Area of Science:
- Ophthalmology
- Refractive Surgery
- Corneal Diseases
Background:
- Laser in situ keratomileusis (LASIK) is a common refractive surgery procedure.
- Diffuse lamellar keratitis (DLK) is a potential complication following LASIK.
- Understanding DLK incidence and outcomes is crucial for patient safety and surgical success.
Purpose of the Study:
- To determine the incidence of DLK after LASIK.
- To identify factors associated with DLK development.
- To evaluate visual outcomes in patients with DLK post-LASIK.
Main Methods:
- Retrospective review of 2711 eyes undergoing LASIK.
- Classification of DLK into Type I (center sparing) and Type II (center involved).
- Subdivision into sporadic (A) and cluster (B) cases; statistical analysis using unpaired t-tests.
Main Results:
- DLK incidence was 1.3% (36 eyes).
- Epithelial defects were associated with a 13-fold increased odds of DLK, particularly Type I.
- Type II DLK had significantly longer resolution times (12.1 days vs. 3.5 days) and higher risk of visual acuity loss.
Conclusions:
- Epithelial defects are a significant risk factor for DLK post-LASIK.
- Type I DLK is more frequently associated with epithelial defects.
- Type II DLK presents a greater risk for prolonged recovery and visual impairment.
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