Visual perception changes and optical stability after intracorneal ring segment implantation: comparison between 3 months and 1 year after surgery

Juliane de Freitas Santos Paranhos, Marcos Pereira &Aacute;vila, Augusto Paranhos Jr, Paulo SchorFederal University of S&atilde;o Paulo, S&atilde;o Paulo, BrazilPurpose: To prospectively evaluate intracorneal ring segment (ICRS) implantation on quality of life (QoL) of patien...

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Autores principales:	Paranhos JFS, Pereira &Aacute;vila M, Paranhos-Jr A, Schor P
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2011
Materias:	Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/9bb64a431d3948438c7dd987ea78c426
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spelling	oai:doaj.org-article:9bb64a431d3948438c7dd987ea78c4262021-12-02T01:02:08ZVisual perception changes and optical stability after intracorneal ring segment implantation: comparison between 3 months and 1 year after surgery1177-54671177-5483https://doaj.org/article/9bb64a431d3948438c7dd987ea78c4262011-07-01T00:00:00Zhttp://www.dovepress.com/visual-perception-changes-and-optical-stability-after-intracorneal-rin-a7989https://doaj.org/toc/1177-5467https://doaj.org/toc/1177-5483Juliane de Freitas Santos Paranhos, Marcos Pereira &Aacute;vila, Augusto Paranhos Jr, Paulo SchorFederal University of S&atilde;o Paulo, S&atilde;o Paulo, BrazilPurpose: To prospectively evaluate intracorneal ring segment (ICRS) implantation on quality of life (QoL) of patients with keratoconus changes and identify factors responsible.Methods: Sixty-nine eyes of 42 keratoconus patients were implanted with the Keraring (Mediphacos, Belo Horizonte, Brazil). Best corrected visual acuity (BCVA), refraction, and steep keratometry were analyzed 3 months and 1 year after surgery. All patients self-administered the National Eye Institute Refractive Error Quality of life instrument at 2 time points: after having worn best correction for at least 30 days since evaluation (mean 4 months after surgery) and 1 year after surgery. To analyze if the use of the appropriate correction at 1 year follow up had any impact on visual acuity and V-QoL, patients were divided into 2 groups: group A (appropriate correction) and B (not appropriate correction).Results: After 1 year, QoL changes related to scales &lsquo;clarity of vision&rsquo;, &lsquo;near vision&rsquo;, and &lsquo;far vision&rsquo;. Keratometric values, sphere, and spherical equivalent did not differ significantly between 3 months and 1 year postoperative. Cylinder increase was statistically but not clinically significant. Binocular BCVA did not change 1 year after surgery in group A and showed a clinically significant impairment in group B. A year after surgery, 18 patients did not use correction suggested by a physician 3 months after surgery. QoL was not statistically different 1 year after surgery between group A and group B.Conclusion: Our findings show that the way keratoconic patients see is difficult to analyze using only quantitative and 1-visit metrics. They highlight the importance of patients&rsquo; self perception and performing longitudinal analysis to consider neural compensation to optical changes from surgery.Keywords: keratoconus, cornea, quality of life&nbsp;Paranhos JFSPereira &Aacute;vila MParanhos-Jr ASchor PDove Medical PressarticleOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2011, Iss default, Pp 1057-1062 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ophthalmology RE1-994
spellingShingle	Ophthalmology RE1-994 Paranhos JFS Pereira &Aacute;vila M Paranhos-Jr A Schor P Visual perception changes and optical stability after intracorneal ring segment implantation: comparison between 3 months and 1 year after surgery
description	Juliane de Freitas Santos Paranhos, Marcos Pereira &Aacute;vila, Augusto Paranhos Jr, Paulo SchorFederal University of S&atilde;o Paulo, S&atilde;o Paulo, BrazilPurpose: To prospectively evaluate intracorneal ring segment (ICRS) implantation on quality of life (QoL) of patients with keratoconus changes and identify factors responsible.Methods: Sixty-nine eyes of 42 keratoconus patients were implanted with the Keraring (Mediphacos, Belo Horizonte, Brazil). Best corrected visual acuity (BCVA), refraction, and steep keratometry were analyzed 3 months and 1 year after surgery. All patients self-administered the National Eye Institute Refractive Error Quality of life instrument at 2 time points: after having worn best correction for at least 30 days since evaluation (mean 4 months after surgery) and 1 year after surgery. To analyze if the use of the appropriate correction at 1 year follow up had any impact on visual acuity and V-QoL, patients were divided into 2 groups: group A (appropriate correction) and B (not appropriate correction).Results: After 1 year, QoL changes related to scales &lsquo;clarity of vision&rsquo;, &lsquo;near vision&rsquo;, and &lsquo;far vision&rsquo;. Keratometric values, sphere, and spherical equivalent did not differ significantly between 3 months and 1 year postoperative. Cylinder increase was statistically but not clinically significant. Binocular BCVA did not change 1 year after surgery in group A and showed a clinically significant impairment in group B. A year after surgery, 18 patients did not use correction suggested by a physician 3 months after surgery. QoL was not statistically different 1 year after surgery between group A and group B.Conclusion: Our findings show that the way keratoconic patients see is difficult to analyze using only quantitative and 1-visit metrics. They highlight the importance of patients&rsquo; self perception and performing longitudinal analysis to consider neural compensation to optical changes from surgery.Keywords: keratoconus, cornea, quality of life&nbsp;
format	article
author	Paranhos JFS Pereira &Aacute;vila M Paranhos-Jr A Schor P
author_facet	Paranhos JFS Pereira &Aacute;vila M Paranhos-Jr A Schor P
author_sort	Paranhos JFS
title	Visual perception changes and optical stability after intracorneal ring segment implantation: comparison between 3 months and 1 year after surgery
title_short	Visual perception changes and optical stability after intracorneal ring segment implantation: comparison between 3 months and 1 year after surgery
title_full	Visual perception changes and optical stability after intracorneal ring segment implantation: comparison between 3 months and 1 year after surgery
title_fullStr	Visual perception changes and optical stability after intracorneal ring segment implantation: comparison between 3 months and 1 year after surgery
title_full_unstemmed	Visual perception changes and optical stability after intracorneal ring segment implantation: comparison between 3 months and 1 year after surgery
title_sort	visual perception changes and optical stability after intracorneal ring segment implantation: comparison between 3 months and 1 year after surgery
publisher	Dove Medical Press
publishDate	2011
url	https://doaj.org/article/9bb64a431d3948438c7dd987ea78c426
work_keys_str_mv	AT paranhosjfs visualperceptionchangesandopticalstabilityafterintracornealringsegmentimplantationcomparisonbetween3monthsand1yearaftersurgery AT pereiraampaacutevilam visualperceptionchangesandopticalstabilityafterintracornealringsegmentimplantationcomparisonbetween3monthsand1yearaftersurgery AT paranhosjra visualperceptionchangesandopticalstabilityafterintracornealringsegmentimplantationcomparisonbetween3monthsand1yearaftersurgery AT schorp visualperceptionchangesandopticalstabilityafterintracornealringsegmentimplantationcomparisonbetween3monthsand1yearaftersurgery
_version_	1718403335283802112

Visual perception changes and optical stability after intracorneal ring segment implantation: comparison between 3 months and 1 year after surgery

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