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Differentiation of mild keratoconus from corneal warpage according to topographic inferior steepening based on corneal tomography data.

Authors:
Lia Florim Patrão Ana Laura Caiado Canedo João Luiz Peixoto Braga de Azevedo Rosane Correa Renato Ambrósio

Arq Bras Oftalmol 2016 Jul-Aug;79(4):264-7

Corneal Tomography and Biomechanics Study Group, Rio de Janeiro, RJ, Brazil.

We report two cases of suspicious asymmetric bow tie and inferior steepening on topographic evaluations with reflection (Placido) and projection (Scheimpflug). Rotating Scheimpflug corneal and anterior segment tomography (Oculus Pentacam HR, Wetzlar, Germany)® was performed in the first case, with a maximal keratometric value (Kmax) of 43.2 D and an overall deviation value from the Belin/Ambrósio Enhanced Ectasia Display (BAD-D) of 1.76, which was observed in the study eye (OD). BAD-D was 6.59 in the fellow eye, which had clinical findings that were consistent with keratoconus stage 2. The second case presented with a Kmax of 45.3 D and BAD-D of 0.76 in OD and 1.01 in OS. This patient had discontinued wearing soft contact lens less than 1 day prior to examination. Corneal tomographic data enabled us to distinguish mild or forme fruste keratoconus from contact lens-induced corneal warpage, and similar findings were observed on curvature maps.

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http://dx.doi.org/10.5935/0004-2749.20160075DOI Listing
April 2017

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The thesis deals with comparison of topographic corneal indexes and their importance for the diagnosis of corneal ectatic disease. The corneas with different stages of keratoconus, forme fruste keratoconus, pellucid marginal degeneration, corneal warpage syndrome, and physiological cornea with varying values of regular astigmatism were included in the tested group. The study was conducted in 2015-2018 at the European Eye Clinic Lexum Brno. Read More

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Can J Ophthalmol 2019 06 28;54(3):374-381. Epub 2018 Nov 28.

Bochner Eye Institute, Toronto, Ont.

Objective: To determine the misdiagnosis of ectasia in patients referred for corneal crosslinking and possible topography-guided photorefractive keratectomy (PRK) or intrastromal corneal rings.

Setting: Bochner Eye Institute, Toronto, Ontario, Canada.

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Influence of soft contact lens material on corneal warpage: prevalence and time to resolution.

Authors:
Youssef Rayess Nicolas Arej Youssef Abdel Massih Joelle Antoun Naji Waked

Can J Ophthalmol 2018 04 31;53(2):135-138. Epub 2017 Oct 31.

Faculty of Medicine, Saint-Joseph University, Beirut, Lebanon; Department of Ophthalmology, Hôtel-Dieu de France Hospital, Beirut, Lebanon.

Objective: Corneal warpage represents a reversible distortion of the corneal surface induced by soft contact lens (SCL) wear. The aim of the study is to assess the influence of SCL materials, age, wearing duration, cylindrical refraction, and spherical equivalence on the prevalence and time to resolution of corneal warpage.

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Motwani LASIK Institute, San Diego, CA, USA.

Purpose: To demonstrate how Wavelight Contoura can be used to repair corneas damaged by trauma and prior poor surgical outcomes.

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