Corneal abrasion associated with contact lens correction of keratoconus--a retrospective study.
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| Abstract | BACKGROUND:
Corneal abrasion is a frequently encountered complication of contact lens wear, but we are not aware of any previous study of relative frequency comparing keratoconic to nonkeratoconic patients. METHODS: We retrospectively studied the incidence of corneal abrasion during 2 months of contact lens practice. RESULTS: 784 contact lens-related patient visits (494 total patients); patients were assessed by 3 optometrists and 13 abrasions (11 patients) were diagnosed. Only the total number of individual patients and the first abrasion for each patient were statistically considered; the overall frequency of abrasion was therefore 11/494 (2.3%)/2 months. The frequency of abrasion was 5/68 (7.4%)/2 months for keratoconic patients and 6/426 (1.4%)/2 months for nonkeratoconic patients and this difference was significant (chi 2 test: p < 0.01). Among nonkeratoconic patients, the frequency of abrasion was 2/246 (0.8%)/2 months with hydrogel contact lens wear and 4/178 (2.2%)/2 months with rigid gas permeable (RGP) contact lens wear, but this difference did not achieve significance (chi 2 test: p = 0.10). IDENTIFIED RISK FACTORS INCLUDED: Contact lens wear; a torn lens and chemical keratitis for hydrogel lens wearers; an adherent "bound" lens and keratoconus for rigid lens wearers. CONCLUSION:
Keratoconus appears to be a statistically significant risk factor for corneal abrasion among contact lens wearers.
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| Authors | B Weissman, M W Chun, L A Barnhart |
| Journal | Optometry and vision science : official publication of the American Academy of Optometry (Optom Vis Sci) Vol. 71 Issue 11 Pg. 677-81 (Nov 1994) ISSN: 1040-5488 [Print] United States |
| PMID | 7885670 (Publication Type: Journal Article) |
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