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Human excimer laser keratectomy. Clinical and histopathologic correlations
P S Binder1, J A Anderson, M E Rock
1National Vision Research Institute, San Diego, CA 92121.
Ophthalmology
|June 1, 1994
Summary
Excimer laser treatment for diseased corneas showed similar healing to animal models. Incomplete tissue removal or disease recurrence were primary reasons for treatment failure in human corneal healing.
Area of Science:
- Ophthalmology
- Corneal Surgery
- Laser Ablation
Background:
- Excimer laser photoablation is used to treat various corneal diseases.
- Understanding the long-term healing response in diseased human corneas is crucial.
Observation:
- Morphologic analysis of human corneas post-phototherapeutic keratectomy revealed epithelial hyperplasia and disorganized stromal matrices.
- Residual or recurrent disease was frequently observed in laser-treated specimens.
Findings:
- The healing response of diseased human corneas to excimer laser treatment mirrors findings from animal studies.
- Treatment failure was primarily attributed to incomplete ablation of diseased tissue or disease recurrence.
- Factors contributing to failure include insufficient ablation depth/diameter and reduced ablation rates in scarred corneas.
Implications:
- These findings highlight the challenges of completely removing diseased tissue and superficial scars with excimer lasers.
- Further research may be needed to optimize excimer laser parameters for challenging corneal pathologies.
- Clinical outcomes may be improved by addressing incomplete ablation and disease recurrence.