Inflammatory response in the early stages of wound healing after excimer laser keratectomy

Terrence P. O'Brien, Qian Li, M. Farooq Ashraf, Dawn M. Matteson, Walter J. Stark, Chi Chao Chan

Research output: Contribution to journalArticlepeer-review

96 Scopus citations


Objective: To evaluate the inflammatory response and its potential role in the early stages of corneal wound healing after excimer laser keratectomy. Materials and Methods: Lewis rats underwent excimer keratectomy using a 193- nm excimer laser. The central corneas were ablated in 3 depths: group A, epithelium; group B, superficial stroma; or group C, deep stroma. Eyes were harvested 1, 12, 24, and 36 hours, and 1 week after the rats were killed. Immunohistochemistry was used to test frozen sections with monoclonal antibodies of various inflammatory cellular markers. Results: Reepithelialization was observed at 12 hours in group A, and at 24 hours in groups B and C. Regenerated epithelium covered the denuded corneal surface in groups B and C after 1 week. The expression of major histocompatibility complex II antigen was detected in infiltrating cells, corneal epithelial cells, and endothelial cells 1 hour after surgery. Only a few macrophages and Langerhans cells were in the limbus at baseline. Macrophages migrated from the limbus to the corneal ablation zone and increased 2-fold after 36 hours in all 3 groups compared with baseline. Occasional lymphocytic infiltration was identified after 25 to 36 hours. Conclusion: Macrophages play an active role in the wound healing after laser keratectomy and may contribute to transient corneal haze.

Original languageEnglish (US)
Pages (from-to)1470-1474
Number of pages5
JournalArchives of ophthalmology
Issue number11
StatePublished - 1998
Externally publishedYes

ASJC Scopus subject areas

  • Ophthalmology


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