Evaluation of normal corneas using the scanning-slit topography/pachymetry system

L. Módis, Achim Langenbucher, Berthold Seitz

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

Purpose: To obtain anterior and posterior corneal shape, curvature, and thickness of normal human corneas. To provide a semiquantitative analysis of normal topography patterns of the anterior and posterior corneal surfaces. Methods: Eighty-eight healthy corneas of 44 normal subjects were analyzed using the scanning-slit topography/pachymetry system. Anterior and posterior elevation and mean power (central and steepest spherical and cylindrical) values and pachymetry data were determined. Right eye values were submitted for primary analysis; however, a comparison between right and left eyes was made in addition to test the possible reliability of the system. Results: There was no significant difference between right and left corneas in 28 evaluated parameters, except for anterior central cylindrical (P = 0.005) and steepest cylindrical (P = 0.017) mean power. The anterior central spherical mean power correlated inversely with the posterior central spherical mean power (r = -0.27, P = 0.04), and the anterior steepest spherical mean power value showed inverse correlation with the mean posterior steepest spherical value (r = -0.44, P = 0.001). The mean central thickness of the cornea was 593.7 ± 54.19 μm at the center and was 578 ± 50.53 μm at the thinnest point, which was localized in 41% (n = 18) of the cases in the inferotemporal quadrant. An oval-shaped pattern was the most characteristic feature of the anterior and posterior elevation, mean power, and pachymetry maps. Conclusion: Orbscan scanning-slit topography seems to be a reliable technique for the evaluation of normal corneas not only for anterior shape and curvature but also for a real pachymetry gradient recording.

Original languageEnglish
Pages (from-to)689-694
Number of pages6
JournalCornea
Volume23
Issue number7
DOIs
Publication statusPublished - Oct 2004

Fingerprint

Cornea

Keywords

  • Cornea
  • Pachymetry
  • Scanning-slit topography

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Evaluation of normal corneas using the scanning-slit topography/pachymetry system. / Módis, L.; Langenbucher, Achim; Seitz, Berthold.

In: Cornea, Vol. 23, No. 7, 10.2004, p. 689-694.

Research output: Contribution to journalArticle

Módis, L. ; Langenbucher, Achim ; Seitz, Berthold. / Evaluation of normal corneas using the scanning-slit topography/pachymetry system. In: Cornea. 2004 ; Vol. 23, No. 7. pp. 689-694.
@article{4e53c9c65a044eefa898c3fa4d726808,
title = "Evaluation of normal corneas using the scanning-slit topography/pachymetry system",
abstract = "Purpose: To obtain anterior and posterior corneal shape, curvature, and thickness of normal human corneas. To provide a semiquantitative analysis of normal topography patterns of the anterior and posterior corneal surfaces. Methods: Eighty-eight healthy corneas of 44 normal subjects were analyzed using the scanning-slit topography/pachymetry system. Anterior and posterior elevation and mean power (central and steepest spherical and cylindrical) values and pachymetry data were determined. Right eye values were submitted for primary analysis; however, a comparison between right and left eyes was made in addition to test the possible reliability of the system. Results: There was no significant difference between right and left corneas in 28 evaluated parameters, except for anterior central cylindrical (P = 0.005) and steepest cylindrical (P = 0.017) mean power. The anterior central spherical mean power correlated inversely with the posterior central spherical mean power (r = -0.27, P = 0.04), and the anterior steepest spherical mean power value showed inverse correlation with the mean posterior steepest spherical value (r = -0.44, P = 0.001). The mean central thickness of the cornea was 593.7 ± 54.19 μm at the center and was 578 ± 50.53 μm at the thinnest point, which was localized in 41{\%} (n = 18) of the cases in the inferotemporal quadrant. An oval-shaped pattern was the most characteristic feature of the anterior and posterior elevation, mean power, and pachymetry maps. Conclusion: Orbscan scanning-slit topography seems to be a reliable technique for the evaluation of normal corneas not only for anterior shape and curvature but also for a real pachymetry gradient recording.",
keywords = "Cornea, Pachymetry, Scanning-slit topography",
author = "L. M{\'o}dis and Achim Langenbucher and Berthold Seitz",
year = "2004",
month = "10",
doi = "10.1097/01.ico.0000126315.05519.0b",
language = "English",
volume = "23",
pages = "689--694",
journal = "Cornea",
issn = "0277-3740",
publisher = "Lippincott Williams and Wilkins",
number = "7",

}

TY - JOUR

T1 - Evaluation of normal corneas using the scanning-slit topography/pachymetry system

AU - Módis, L.

AU - Langenbucher, Achim

AU - Seitz, Berthold

PY - 2004/10

Y1 - 2004/10

N2 - Purpose: To obtain anterior and posterior corneal shape, curvature, and thickness of normal human corneas. To provide a semiquantitative analysis of normal topography patterns of the anterior and posterior corneal surfaces. Methods: Eighty-eight healthy corneas of 44 normal subjects were analyzed using the scanning-slit topography/pachymetry system. Anterior and posterior elevation and mean power (central and steepest spherical and cylindrical) values and pachymetry data were determined. Right eye values were submitted for primary analysis; however, a comparison between right and left eyes was made in addition to test the possible reliability of the system. Results: There was no significant difference between right and left corneas in 28 evaluated parameters, except for anterior central cylindrical (P = 0.005) and steepest cylindrical (P = 0.017) mean power. The anterior central spherical mean power correlated inversely with the posterior central spherical mean power (r = -0.27, P = 0.04), and the anterior steepest spherical mean power value showed inverse correlation with the mean posterior steepest spherical value (r = -0.44, P = 0.001). The mean central thickness of the cornea was 593.7 ± 54.19 μm at the center and was 578 ± 50.53 μm at the thinnest point, which was localized in 41% (n = 18) of the cases in the inferotemporal quadrant. An oval-shaped pattern was the most characteristic feature of the anterior and posterior elevation, mean power, and pachymetry maps. Conclusion: Orbscan scanning-slit topography seems to be a reliable technique for the evaluation of normal corneas not only for anterior shape and curvature but also for a real pachymetry gradient recording.

AB - Purpose: To obtain anterior and posterior corneal shape, curvature, and thickness of normal human corneas. To provide a semiquantitative analysis of normal topography patterns of the anterior and posterior corneal surfaces. Methods: Eighty-eight healthy corneas of 44 normal subjects were analyzed using the scanning-slit topography/pachymetry system. Anterior and posterior elevation and mean power (central and steepest spherical and cylindrical) values and pachymetry data were determined. Right eye values were submitted for primary analysis; however, a comparison between right and left eyes was made in addition to test the possible reliability of the system. Results: There was no significant difference between right and left corneas in 28 evaluated parameters, except for anterior central cylindrical (P = 0.005) and steepest cylindrical (P = 0.017) mean power. The anterior central spherical mean power correlated inversely with the posterior central spherical mean power (r = -0.27, P = 0.04), and the anterior steepest spherical mean power value showed inverse correlation with the mean posterior steepest spherical value (r = -0.44, P = 0.001). The mean central thickness of the cornea was 593.7 ± 54.19 μm at the center and was 578 ± 50.53 μm at the thinnest point, which was localized in 41% (n = 18) of the cases in the inferotemporal quadrant. An oval-shaped pattern was the most characteristic feature of the anterior and posterior elevation, mean power, and pachymetry maps. Conclusion: Orbscan scanning-slit topography seems to be a reliable technique for the evaluation of normal corneas not only for anterior shape and curvature but also for a real pachymetry gradient recording.

KW - Cornea

KW - Pachymetry

KW - Scanning-slit topography

UR - http://www.scopus.com/inward/record.url?scp=4744346127&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4744346127&partnerID=8YFLogxK

U2 - 10.1097/01.ico.0000126315.05519.0b

DO - 10.1097/01.ico.0000126315.05519.0b

M3 - Article

C2 - 15448494

AN - SCOPUS:4744346127

VL - 23

SP - 689

EP - 694

JO - Cornea

JF - Cornea

SN - 0277-3740

IS - 7

ER -