Comparison of topographic corneal irregularity after LASIK and intrastromal corneal ring segments in the same patients

Comparison of topographic corneal irregularity after LASIK and intrastromal corneal ring segments in the same patients

Author Naseri, Ayman Google Scholar
Forseto, Adriana S. Google Scholar
Francesconi, Claudia M. Google Scholar
Hwang, David G. Google Scholar
Campos, Maauro Google Scholar
Nosé, Walton Google Scholar
Institution Mayo Clin
Universidade Federal de São Paulo (UNIFESP)
Eye Clin Day Hosp
UCSF
Abstract PURPOSE: To retrospectively compare the irregularity of the corneal surfaces of 14 patients after LASIK in 1 eye and placement of intrastromal corneal ring segments (ICRS) in the other eye.METHODS: In a within-patient comparison, Orbscan corneal topography was used to retrospectively compare the corneal surface irregularity of LASIK-treated and ICRS-treated eyes at an outpatient tert ophthalmology clinic in Sao Paulo, Brazil. For the anterior corneal surface, irregularity measurements were compared for both the central and peripheral areas of the cornea. The differences between each group were analyzed for statistical significance.RESULTS: The corneal surfaces of eyes treated with ICRS were found to be more irregular than the corneal surfaces of eyes treated with LASIK, the mean irregularity being 1.91 for LASIK-treated eyes and 3.12 for ICRS-treated eyes in the anterior corneal surface and 0.51 for LASIK-treated eyes and 0.87 for ICRS-treated eyes in the posterior corneal surface. A statistically significant difference was noted only in the posterior surfaces.CONCLUSIONS: When measured with Orbscan topography, ICRS-treated eyes show more corneal surface irregularity than LASIK-treated eyes. The difference in outcome for the two types of treatment may be due to the mechanical effect of the ICRS on the shape of the cornea.
Language English
Date 2005-11-01
Published in Journal Of Refractive Surgery. Thorofare: Slack Inc, v. 21, n. 6, p. 722-726, 2005.
ISSN 1081-597X (Sherpa/Romeo, impact factor)
Publisher Slack Inc
Extent 722-726
Origin http://dx.doi.org/10.3928/1081-597X-20051101-11
Access rights Closed access
Type Article
Web of Science ID WOS:000233676000007
URI http://repositorio.unifesp.br/11600/44612

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