$Posterior corneal curvature changes following Refractive Small Incision Lenticule Extraction$
Código QR

Posterior corneal curvature changes following Refractive Small Incision Lenticule Extraction

Sri Ganesh, Utsav Patel, Sheetal Brar Phaco and Refractive Surgery Department, Nethradhama Superspeciality Eye Hospital, Bengaluru, Karnataka, India Purpose: To compare the posterior corneal curvature changes, in terms of corneal power and asphercity, following Refractive Small Incision Lenticule...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Ganesh S, Patel U, Brar S
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2015
Materias:	Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/3b3604488e634c19a5be03e4563599e4
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:3b3604488e634c19a5be03e4563599e4
record_format	dspace
spelling	oai:doaj.org-article:3b3604488e634c19a5be03e4563599e42021-12-02T07:44:24ZPosterior corneal curvature changes following Refractive Small Incision Lenticule Extraction1177-5483https://doaj.org/article/3b3604488e634c19a5be03e4563599e42015-07-01T00:00:00Zhttp://www.dovepress.com/posterior-corneal-curvature-changes-following-refractive-small-incisio-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Sri Ganesh, Utsav Patel, Sheetal Brar Phaco and Refractive Surgery Department, Nethradhama Superspeciality Eye Hospital, Bengaluru, Karnataka, India Purpose: To compare the posterior corneal curvature changes, in terms of corneal power and asphercity, following Refractive Small Incision Lenticule Extraction (ReLEx SMILE) procedure for low, moderate, and high myopia.Methods: This retrospective, non randomized, comparative, interventional trial; included 52 eyes of 26 patients, divided in three groups: low myopia (myopia ≤3 D [diopters] spherical equivalent [SE]), moderate myopia (myopia >3 D and <6 D SE), and high myopia (myopia ≥6 D SE). All patients were treated for myopia and myopic astigmatism using ReLEx SMILE. The eyes were examined pre-operatively and 3 months post-operatively using SCHWIND SIRIUS, a three-dimensional rotating Scheimpflug camera with a Placido disc topographer to assess corneal changes with regard to keratometric power and asphericity of the cornea.Results: A statistically significant increase in mean keratometric power in the 3, 5, and 7 mm zones of the posterior corneal surface compared with its pre-ReLEx SMILE value was detected after 3 months in the moderate myopia group (pre-operative [pre-op] -6.14±0.23, post-operative [post-op] -6.29±0.22, P<0.001) and high myopia group (pre-op -6.19±0.16, post-op -6.4±0.18, P<0.001), but there was no significant change in keratometric power of the posterior surface in the low myopia group (pre-op -5.87±0.17, post-op -6.06±0.29, P=0.143). Asphericity (Q-value) of the posterior surface changed significantly (P<0.001) after ReLEx SMILE in the moderate myopia group in the 3, 5, and 7 mm zones, and in the high myopia group in the 3 and 7 mm zones; but there was no significant change in the Q-value in the low myopia group in all three zones (pre-op 0.23±0.43, post-op -0.40±0.71, P=0.170), and in the high myopia group in the 5 mm zone (P=0.228).Conclusion: ReLEx SMILE causes significant changes in posterior corneal keratometric power and asphericity in moderate and high myopia, but the effect is subtle and insignificant in low myopia. Keywords: ReLEx SMILE, Refractive Small Incision Lenticule Extraction, posterior curvature, corneal keratometric power, corneal asphericityGanesh SPatel UBrar SDove Medical PressarticleOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2015, Iss default, Pp 1359-1364 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ophthalmology RE1-994
spellingShingle	Ophthalmology RE1-994 Ganesh S Patel U Brar S Posterior corneal curvature changes following Refractive Small Incision Lenticule Extraction
description	Sri Ganesh, Utsav Patel, Sheetal Brar Phaco and Refractive Surgery Department, Nethradhama Superspeciality Eye Hospital, Bengaluru, Karnataka, India Purpose: To compare the posterior corneal curvature changes, in terms of corneal power and asphercity, following Refractive Small Incision Lenticule Extraction (ReLEx SMILE) procedure for low, moderate, and high myopia.Methods: This retrospective, non randomized, comparative, interventional trial; included 52 eyes of 26 patients, divided in three groups: low myopia (myopia ≤3 D [diopters] spherical equivalent [SE]), moderate myopia (myopia >3 D and <6 D SE), and high myopia (myopia ≥6 D SE). All patients were treated for myopia and myopic astigmatism using ReLEx SMILE. The eyes were examined pre-operatively and 3 months post-operatively using SCHWIND SIRIUS, a three-dimensional rotating Scheimpflug camera with a Placido disc topographer to assess corneal changes with regard to keratometric power and asphericity of the cornea.Results: A statistically significant increase in mean keratometric power in the 3, 5, and 7 mm zones of the posterior corneal surface compared with its pre-ReLEx SMILE value was detected after 3 months in the moderate myopia group (pre-operative [pre-op] -6.14±0.23, post-operative [post-op] -6.29±0.22, P<0.001) and high myopia group (pre-op -6.19±0.16, post-op -6.4±0.18, P<0.001), but there was no significant change in keratometric power of the posterior surface in the low myopia group (pre-op -5.87±0.17, post-op -6.06±0.29, P=0.143). Asphericity (Q-value) of the posterior surface changed significantly (P<0.001) after ReLEx SMILE in the moderate myopia group in the 3, 5, and 7 mm zones, and in the high myopia group in the 3 and 7 mm zones; but there was no significant change in the Q-value in the low myopia group in all three zones (pre-op 0.23±0.43, post-op -0.40±0.71, P=0.170), and in the high myopia group in the 5 mm zone (P=0.228).Conclusion: ReLEx SMILE causes significant changes in posterior corneal keratometric power and asphericity in moderate and high myopia, but the effect is subtle and insignificant in low myopia. Keywords: ReLEx SMILE, Refractive Small Incision Lenticule Extraction, posterior curvature, corneal keratometric power, corneal asphericity
format	article
author	Ganesh S Patel U Brar S
author_facet	Ganesh S Patel U Brar S
author_sort	Ganesh S
title	Posterior corneal curvature changes following Refractive Small Incision Lenticule Extraction
title_short	Posterior corneal curvature changes following Refractive Small Incision Lenticule Extraction
title_full	Posterior corneal curvature changes following Refractive Small Incision Lenticule Extraction
title_fullStr	Posterior corneal curvature changes following Refractive Small Incision Lenticule Extraction
title_full_unstemmed	Posterior corneal curvature changes following Refractive Small Incision Lenticule Extraction
title_sort	posterior corneal curvature changes following refractive small incision lenticule extraction
publisher	Dove Medical Press
publishDate	2015
url	https://doaj.org/article/3b3604488e634c19a5be03e4563599e4
work_keys_str_mv	AT ganeshs posteriorcornealcurvaturechangesfollowingrefractivesmallincisionlenticuleextraction AT patelu posteriorcornealcurvaturechangesfollowingrefractivesmallincisionlenticuleextraction AT brars posteriorcornealcurvaturechangesfollowingrefractivesmallincisionlenticuleextraction
_version_	1718399215238905856

Posterior corneal curvature changes following Refractive Small Incision Lenticule Extraction

Ejemplares similares