Document Detail

Measure of keratoconus progression using Orbscan II.
MedLine Citation:
PMID:  18581785     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To observe the progression of keratoconus over 3 years using Orbscan II, and to estimate risk correlations with rapid progressive changes. METHODS: Fifty-six eyes of 35 patients (mean age: 25.9+/-5.7 years, range: 18 to 35 years) with keratoconus were reviewed whose sex, age, visual acuity, refractive error, atopy, eye rubbing habits, family history of keratoconus, hard contact lens wear, intraocular pressure, keratometric reading, corneal shape, corneal thickness index, and corneal asphericity had been determined. The keratometric change over 3 years was evaluated using Orbscan II, with 6-month intervals between each examination. All patients selected had less than moderate keratoconus on initial examination. RESULTS: The rate of keratometric change was 0.78+/-0.99 diopters (D)/half-year. In 30 eyes, the apparent progression was evident with a rate of keratometric change of 1.37+/-1.08 D/half-year, whereas the rate of change was 0.15+/-0.15 D/half-year in eyes exhibiting no apparent progression (P=.001). Logistic regression analysis showed that eye rubbing (odds ratio [OR] = 3.810; 95% confidence interval [Cl] = 1.194-12.158) and inferior steepening compared to superior steepening (OR = 5.465; 95% CI = 1.667-17.857) were associated with progression after diagnosis (P<.05). CONCLUSIONS: Careful attention must be paid to the presence of eye rubbing and corneal shape with inferior steepening at the time of diagnosis, as these factors may help in predicting the rapid progressive change in keratoconus.
Hyojin Kim; Choun-Ki Joo
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of refractive surgery (Thorofare, N.J. : 1995)     Volume:  24     ISSN:  1081-597X     ISO Abbreviation:  J Refract Surg     Publication Date:  2008 Jun 
Date Detail:
Created Date:  2008-06-27     Completed Date:  2008-07-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9505927     Medline TA:  J Refract Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  600-5     Citation Subset:  IM    
Department of Visual Optics, Division of Health Science, Baekseok University, Seoul, Korea.
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MeSH Terms
Contact Lenses / utilization
Cornea / physiopathology*
Corneal Topography*
Disease Progression
Intraocular Pressure
Keratoconus / diagnosis,  physiopathology*
Odds Ratio
Refraction, Ocular / physiology
Refractive Errors / physiopathology
Risk Factors
Visual Acuity / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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