Clear-cornea cataract surgery: pupil size and shape changes, along with anterior chamber volume and depth changes. A Scheimpflug imaging study

Anastasios John Kanellopoulos,1,2 George Asimellis11Laservision.gr Eye Institute, Athens, Greece; 2New York University School of Medicine, New York, NY, USA Purpose: To investigate, by high-precision digital analysis of data provided by Scheimpflug imaging, changes in pupil size and shape and anter...

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Autores principales:	Kanellopoulos AJ, Asimellis G
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2014
Materias:	Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/549335a239494b65aa769a0199e2ca7f
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spelling	oai:doaj.org-article:549335a239494b65aa769a0199e2ca7f2021-12-02T06:20:24ZClear-cornea cataract surgery: pupil size and shape changes, along with anterior chamber volume and depth changes. A Scheimpflug imaging study1177-5483https://doaj.org/article/549335a239494b65aa769a0199e2ca7f2014-10-01T00:00:00Zhttp://www.dovepress.com/clear-cornea-cataract-surgery-pupil-size-and-shape-changes-along-with--peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483 Anastasios John Kanellopoulos,1,2 George Asimellis11Laservision.gr Eye Institute, Athens, Greece; 2New York University School of Medicine, New York, NY, USA Purpose: To investigate, by high-precision digital analysis of data provided by Scheimpflug imaging, changes in pupil size and shape and anterior chamber (AC) parameters following cataract surgery.Patients and methods: The study group (86 eyes, patient age 70.58±10.33 years) was subjected to cataract removal surgery with in-the-bag intraocular lens implantation (pseudophakic). A control group of 75 healthy eyes (patient age 51.14±16.27 years) was employed for comparison. Scheimpflug imaging (preoperatively and 3 months postoperatively) was employed to investigate central corneal thickness, AC depth, and AC volume. In addition, by digitally analyzing the black-and-white dotted line pupil edge marking in the Scheimpflug “large maps,” the horizontal and vertical pupil diameters were individually measured and the pupil eccentricity was calculated. The correlations between AC depth and pupil shape parameters versus patient age, as well as the postoperative AC and pupil size and shape changes, were investigated.Results: Compared to preoperative measurements, AC depth and AC volume of the pseudophakic eyes increased by 0.99±0.46 mm (39%; P<0.001) and 43.57±24.59 mm3 (36%; P<0.001), respectively. Pupil size analysis showed that the horizontal pupil diameter was reduced by -0.27±0.22 mm (-9.7%; P=0.001) and the vertical pupil diameter was reduced by -0.32±0.24 mm (-11%; P<0.001). Pupil eccentricity was reduced by -39.56%; P<0.001.Conclusion: Cataract extraction surgery appears to affect pupil size and shape, possibly in correlation to AC depth increase. This novel investigation based on digital analysis of Scheimpflug imaging data suggests that the cataract postoperative photopic pupil is reduced and more circular. These changes appear to be more significant with increasing patient age. Keywords: cataract removal, anterior chamber, pupil size, pupil eccentricity, Scheimpflug imaging, pupil changes, pseudophakic eyes, postoperative myosisKanellopoulos AJAsimellis GDove Medical PressarticleOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2014, Iss default, Pp 2141-2150 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ophthalmology RE1-994
spellingShingle	Ophthalmology RE1-994 Kanellopoulos AJ Asimellis G Clear-cornea cataract surgery: pupil size and shape changes, along with anterior chamber volume and depth changes. A Scheimpflug imaging study
description	Anastasios John Kanellopoulos,1,2 George Asimellis11Laservision.gr Eye Institute, Athens, Greece; 2New York University School of Medicine, New York, NY, USA Purpose: To investigate, by high-precision digital analysis of data provided by Scheimpflug imaging, changes in pupil size and shape and anterior chamber (AC) parameters following cataract surgery.Patients and methods: The study group (86 eyes, patient age 70.58±10.33 years) was subjected to cataract removal surgery with in-the-bag intraocular lens implantation (pseudophakic). A control group of 75 healthy eyes (patient age 51.14±16.27 years) was employed for comparison. Scheimpflug imaging (preoperatively and 3 months postoperatively) was employed to investigate central corneal thickness, AC depth, and AC volume. In addition, by digitally analyzing the black-and-white dotted line pupil edge marking in the Scheimpflug “large maps,” the horizontal and vertical pupil diameters were individually measured and the pupil eccentricity was calculated. The correlations between AC depth and pupil shape parameters versus patient age, as well as the postoperative AC and pupil size and shape changes, were investigated.Results: Compared to preoperative measurements, AC depth and AC volume of the pseudophakic eyes increased by 0.99±0.46 mm (39%; P<0.001) and 43.57±24.59 mm3 (36%; P<0.001), respectively. Pupil size analysis showed that the horizontal pupil diameter was reduced by -0.27±0.22 mm (-9.7%; P=0.001) and the vertical pupil diameter was reduced by -0.32±0.24 mm (-11%; P<0.001). Pupil eccentricity was reduced by -39.56%; P<0.001.Conclusion: Cataract extraction surgery appears to affect pupil size and shape, possibly in correlation to AC depth increase. This novel investigation based on digital analysis of Scheimpflug imaging data suggests that the cataract postoperative photopic pupil is reduced and more circular. These changes appear to be more significant with increasing patient age. Keywords: cataract removal, anterior chamber, pupil size, pupil eccentricity, Scheimpflug imaging, pupil changes, pseudophakic eyes, postoperative myosis
format	article
author	Kanellopoulos AJ Asimellis G
author_facet	Kanellopoulos AJ Asimellis G
author_sort	Kanellopoulos AJ
title	Clear-cornea cataract surgery: pupil size and shape changes, along with anterior chamber volume and depth changes. A Scheimpflug imaging study
title_short	Clear-cornea cataract surgery: pupil size and shape changes, along with anterior chamber volume and depth changes. A Scheimpflug imaging study
title_full	Clear-cornea cataract surgery: pupil size and shape changes, along with anterior chamber volume and depth changes. A Scheimpflug imaging study
title_fullStr	Clear-cornea cataract surgery: pupil size and shape changes, along with anterior chamber volume and depth changes. A Scheimpflug imaging study
title_full_unstemmed	Clear-cornea cataract surgery: pupil size and shape changes, along with anterior chamber volume and depth changes. A Scheimpflug imaging study
title_sort	clear-cornea cataract surgery: pupil size and shape changes, along with anterior chamber volume and depth changes. a scheimpflug imaging study
publisher	Dove Medical Press
publishDate	2014
url	https://doaj.org/article/549335a239494b65aa769a0199e2ca7f
work_keys_str_mv	AT kanellopoulosaj clearcorneacataractsurgerypupilsizeandshapechangesalongwithanteriorchambervolumeanddepthchangesascheimpflugimagingstudy AT asimellisg clearcorneacataractsurgerypupilsizeandshapechangesalongwithanteriorchambervolumeanddepthchangesascheimpflugimagingstudy
_version_	1718399931899707392

Clear-cornea cataract surgery: pupil size and shape changes, along with anterior chamber volume and depth changes. A Scheimpflug imaging study

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