Posterior Corneal Curvature Assessment after Epi-LASIK for Myopia: Comparison of Orbscan II and Pentacam Imaging

To compare the changes in posterior corneal curvature using scanning slit topography (Orbscan II) and Scheimpflug imaging (Pentacam) before and after Epi-laser in situ keratomileusis (LASIK) for myopia. In a prospective observational case-series study, 20 myopic patients having undergone Epi-LASIK w...

Full description

Saved in:
Bibliographic Details
Published inKorean journal of ophthalmology Vol. 26; no. 1; pp. 6 - 9
Main Authors Byun, Yong-Soo, Chung, So-Hyang, Park, Young-Geun, Joo, Choun-Ki
Format Journal Article
LanguageEnglish
Published Korea (South) The Korean Ophthalmological Society 01.02.2012
대한안과학회
Subjects
Online AccessGet full text
ISSN1011-8942
2092-9382
2092-9382
DOI10.3341/kjo.2012.26.1.6

Cover

More Information
Summary:To compare the changes in posterior corneal curvature using scanning slit topography (Orbscan II) and Scheimpflug imaging (Pentacam) before and after Epi-laser in situ keratomileusis (LASIK) for myopia. In a prospective observational case-series study, 20 myopic patients having undergone Epi-LASIK were examined serially with two different devices, Orbscan II and Pentacam, preoperatively and one month postoperatively. Posterior central elevation (PCE) and posterior maximal elevation (PME) were compared between the two devices, and the changes in parameters after Epi-LASIK were analyzed using a difference map. All parameters (preoperative and postoperative PCE and preoperative and postoperative PME) that were measured using the Orbscan II were significantly greater compared to those of the Pentacam (for all p < 0.001). PCE and PME were significantly increased one month postoperatively in the Orbscan II measurements (p < 0.05) but were not significantly increased in the Pentacam measurements. Also, ΔPCE and ΔPME, in the difference map obtained by each serial scanning, were significantly greater in the Orbscan II measurements than with the Pentacam (p = 0.012, p = 0.016). The Pentacam measurements displayed significantly reduced values in all parameters related to posterior corneal elevation compared to those of the Orbscan II. The Pentacam showed no significant change in posterior corneal curvature after Epi-LASIK, based on the difference map.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
G704-002170.2012.26.1.001
ISSN:1011-8942
2092-9382
2092-9382
DOI:10.3341/kjo.2012.26.1.6