Reassembly of Corneal Epithelial Adhesion Structures After Excimer Laser Keratectomy in Humans

Tamara R. Fountain, Zenaida Cruz, W. Richard Green, Walter J. Stark, Dimitri T. Azar

Research output: Contribution to journalArticlepeer-review

Abstract

Objective: To determine the pattern of long-term reformation of the adhesion structures after excimer laser phototherapeutic keratectomy. Methods: Four corneal buttons were removed at penetrating keratoplasty 6 to 15 months after initial excimer laser phototherapeutic keratectomy. Morphometric analysis of electron micrographs of the wound bed was performed to determine the extent and pattern of reformation of hemidesmosomes, anchoring fibrils, and basal laminae. Results: Eight percent of the basal epithelial cells had underlying normal anchoring fibrils at 6 months, compared with 35% at 15 months. The percentage of basal cell membrane occupied by hemidesmosomes remained fairly constant (35.2% to 37.7%). With the exception of a localized area of multilamination seen at 9 months, the cross-sectional area of basal lamina per 100 μm of basal cell membrane increased with the duration of wound healing (18.0 μm2 at 6 months, 24.4 μm2 at 15 months) but remained below normal levels (32 μm2). Conclusions: These data suggest that after human excimer keratectomy, the anchoring fibrils and basal lamina do not completely normalize even after 15 months.

Original languageEnglish (US)
Pages (from-to)967-972
Number of pages6
JournalArchives of ophthalmology
Volume112
Issue number7
DOIs
StatePublished - Jul 1994

ASJC Scopus subject areas

  • Ophthalmology

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