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Review
. 2018 Mar;66(3):373-382.
doi: 10.4103/ijo.IJO_831_17.

Dynamic corneal deformation response and integrated corneal tomography

Marcella Q Salomão  1 , Ana Luisa Hofling-Lima  2 , Fernando Faria-Correia  3 , Bernardo Teixeira Lopes  1 , Sandra Rodrigues-Barros  4 , Cynthia J Roberts  5 , Renato Ambrósio  1
Affiliations
Review

Dynamic corneal deformation response and integrated corneal tomography

Marcella Q Salomão et al. Indian J Ophthalmol. 2018 Mar.

Abstract

Measuring corneal biomechanical properties is still challenging. There are several clinical applications for biomechanical measurements, including the detection of mild or early forms of ectatic corneal diseases. This article reviews clinical applications for biomechanical measurements provided by the Corvis ST dynamic non contact tonometer.

Keywords: Corneal biomechanics; corneal tomography; ectasia; keratoconus.

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Conflict of interest statement

There are no conflicts of interest.

Figures

Figure 1
Figure 1
Corvis ST overview display
Figure 2
Figure 2
Corvis ST corneal biomechanical index display
Figure 3
Figure 3
Axial and tangential curvature maps of the front corneal surface from both eyes, obtained with the Pentacam HR corneal tomography (Oculus Optikgeräte GmbH, Wetzlar, Germany). Very mild asymmetry is observed in OD and advanced KC in OS
Figure 4
Figure 4
Anterior surface corneal topography from OD at the first visit in 2015 (C) and with 2 years of follow up in 2017 (A). Anterior surface corneal topography from OS in pre (D) and post operative (B) periods
Figure 5
Figure 5
Belin-Ambrósio Enhanced Ectasia Display from the Pentacam of OD. Note ARTmax value of 371 and Belin/Ambrósio Deviation of 1.25
Figure 6
Figure 6
Figur 6: D-The Belin ABCD keratoconus staging
Figure 7
Figure 7
Ambrósio, Robers and Vinciguerra tomographic/biomechanical index display. Observe an abnormal corneal biomechanical index value of 0.95 and abnormal tomographic/biomechanical index value of 0.74
Figure 8
Figure 8
Axial curvature maps of the front corneal surface obtained with the Keratograph 5M (Oculus Optikgeräte GmbH, Wetzlar, Germany). We can observe a truncated bow tie and skewed radial axis pattern in OD, but innocent findings in OS. The bottom part of the figure presents Pentacam maps with Belin ABCD keratoconus staging
Figure 9
Figure 9
Belin-Ambrósio Enhanced Ectasia Display from the Pentacam of OS. Unremarkable findings are observed
Figure 10
Figure 10
Pentacam/Corvis ST Ambrósio, Roberts and Vinciguerra tomographic/biomechanical index display
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