Changes in corneal biomechanics following different keratoplasty techniques

Mohamed Hosny, Mohamed Abdel Moneim Hassaballa, Ahmed ShalabyOphthalmology Department, Faculty of Medicine, Cairo University, Cairo, EgyptPurpose: To evaluate corneal biomechanics with the Ocular Response Analyzer (ORA; Reichert Ophthalmic Instruments, Depew, NY) after penetrating keratoplasty (PK)...

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Autores principales:	Hosny M, Hassaballa MAM, Shalaby A
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2011
Materias:	Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/e68478f9156845d0b8701ebafd617ef7
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spelling	oai:doaj.org-article:e68478f9156845d0b8701ebafd617ef72021-12-02T03:58:48ZChanges in corneal biomechanics following different keratoplasty techniques1177-54671177-5483https://doaj.org/article/e68478f9156845d0b8701ebafd617ef72011-06-01T00:00:00Zhttp://www.dovepress.com/changes-in-corneal-biomechanics-following-different-keratoplasty-techn-a7624https://doaj.org/toc/1177-5467https://doaj.org/toc/1177-5483Mohamed Hosny, Mohamed Abdel Moneim Hassaballa, Ahmed ShalabyOphthalmology Department, Faculty of Medicine, Cairo University, Cairo, EgyptPurpose: To evaluate corneal biomechanics with the Ocular Response Analyzer (ORA; Reichert Ophthalmic Instruments, Depew, NY) after penetrating keratoplasty (PK) and deep anterior lamellar keratoplasty (DALK).Subjects and methods: Sixty-three eyes of 63 patients were included in this prospective comparative study. Patients were divided into 3 groups: the first included 21 eyes of normal subjects (control group); the second included 21 eyes with PK; the third included 21 eyes with DALK. ORA was performed 2 months postoperatively for all patients.Results: Both mean corneal hysteresis (CH) and mean corneal resistance factor (CRF) were significantly lower in the PK group than both the DALK group and matched controls. No statistically significant difference was found between mean CH and mean CRF between the DALK group and matched controlsConclusion: Corneas after PK have weaker biomechanical properties than normal corneas. DALK preserves the biomechanical strength of the corneas to almost normal values.Keywords: hysteresis, keratoplasty, keratoconus&nbsp;Hosny MHassaballa MAMShalaby ADove Medical PressarticleOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2011, Iss default, Pp 767-770 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ophthalmology RE1-994
spellingShingle	Ophthalmology RE1-994 Hosny M Hassaballa MAM Shalaby A Changes in corneal biomechanics following different keratoplasty techniques
description	Mohamed Hosny, Mohamed Abdel Moneim Hassaballa, Ahmed ShalabyOphthalmology Department, Faculty of Medicine, Cairo University, Cairo, EgyptPurpose: To evaluate corneal biomechanics with the Ocular Response Analyzer (ORA; Reichert Ophthalmic Instruments, Depew, NY) after penetrating keratoplasty (PK) and deep anterior lamellar keratoplasty (DALK).Subjects and methods: Sixty-three eyes of 63 patients were included in this prospective comparative study. Patients were divided into 3 groups: the first included 21 eyes of normal subjects (control group); the second included 21 eyes with PK; the third included 21 eyes with DALK. ORA was performed 2 months postoperatively for all patients.Results: Both mean corneal hysteresis (CH) and mean corneal resistance factor (CRF) were significantly lower in the PK group than both the DALK group and matched controls. No statistically significant difference was found between mean CH and mean CRF between the DALK group and matched controlsConclusion: Corneas after PK have weaker biomechanical properties than normal corneas. DALK preserves the biomechanical strength of the corneas to almost normal values.Keywords: hysteresis, keratoplasty, keratoconus&nbsp;
format	article
author	Hosny M Hassaballa MAM Shalaby A
author_facet	Hosny M Hassaballa MAM Shalaby A
author_sort	Hosny M
title	Changes in corneal biomechanics following different keratoplasty techniques
title_short	Changes in corneal biomechanics following different keratoplasty techniques
title_full	Changes in corneal biomechanics following different keratoplasty techniques
title_fullStr	Changes in corneal biomechanics following different keratoplasty techniques
title_full_unstemmed	Changes in corneal biomechanics following different keratoplasty techniques
title_sort	changes in corneal biomechanics following different keratoplasty techniques
publisher	Dove Medical Press
publishDate	2011
url	https://doaj.org/article/e68478f9156845d0b8701ebafd617ef7
work_keys_str_mv	AT hosnym changesincornealbiomechanicsfollowingdifferentkeratoplastytechniques AT hassaballamam changesincornealbiomechanicsfollowingdifferentkeratoplastytechniques AT shalabya changesincornealbiomechanicsfollowingdifferentkeratoplastytechniques
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Changes in corneal biomechanics following different keratoplasty techniques

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