The effect of pterygium surgery on contrast sensitivity and corneal topographic changes

Joo Youn Oh, Won Ryang WeeDepartment of Ophthalmology, Seoul National University Hospital, Seoul, KoreaPurpose: To investigate the effect of pterygium surgery on corneal topography and contrast sensitivity.Patient and methods: The IRB approved this prospective, nonrandomized, self-controlled study....

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Autores principales:	Joo Youn Oh, Won Ryang Wee
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2010
Materias:	Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/21225b52601e42f18918a606ad6e5d03
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spelling	oai:doaj.org-article:21225b52601e42f18918a606ad6e5d032021-12-02T06:25:27ZThe effect of pterygium surgery on contrast sensitivity and corneal topographic changes1177-54671177-5483https://doaj.org/article/21225b52601e42f18918a606ad6e5d032010-04-01T00:00:00Zhttp://www.dovepress.com/the-effect-of-pterygium-surgery-on-contrast-sensitivity-and-corneal-to-a4288https://doaj.org/toc/1177-5467https://doaj.org/toc/1177-5483Joo Youn Oh, Won Ryang WeeDepartment of Ophthalmology, Seoul National University Hospital, Seoul, KoreaPurpose: To investigate the effect of pterygium surgery on corneal topography and contrast sensitivity.Patient and methods: The IRB approved this prospective, nonrandomized, self-controlled study. Computerized videokeratography (Orbscan II) was performed in 36 patients with primary pterygia, both before and 1 month after pterygium excision with limbal-conjunctival autografting. The topographic parameters were compared. Spatial contrast sensitivity testing was performed using VCTS 6500. Differences between preoperative and postoperative values were evaluated statistically.Results: The mean Sim K astigmatism and irregularity index, significantly decreased after pterygium surgery. The mean refractive power significantly increased after the operation. The &ldquo;with-the-rule&rdquo; astigmatism induced by pterygium became &ldquo;against-the-rule&rdquo; astigmatism after pterygium removal (P = 0.041). The contrast sensitivity of 6, 12, and 18 cycles per degree, significantly increased from 1.55 &plusmn; 0.28, 0.97 &plusmn; 0.47, and 0.29 &plusmn; 0.16 to 1.72 &plusmn; 0.18, 1.21 &plusmn; 0.44, and 0.65 &plusmn; 0.48, respectively (P = 0.007, &lt;0.001, &lt;0.001, respectively).Conclusions: Pterygium surgery significantly reduces corneal topographic astigmatism and improves contrast sensitivity.Keywords: corneal topography, visual acuity Joo Youn OhWon Ryang WeeDove Medical PressarticleOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2010, Iss default, Pp 315-319 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ophthalmology RE1-994
spellingShingle	Ophthalmology RE1-994 Joo Youn Oh Won Ryang Wee The effect of pterygium surgery on contrast sensitivity and corneal topographic changes
description	Joo Youn Oh, Won Ryang WeeDepartment of Ophthalmology, Seoul National University Hospital, Seoul, KoreaPurpose: To investigate the effect of pterygium surgery on corneal topography and contrast sensitivity.Patient and methods: The IRB approved this prospective, nonrandomized, self-controlled study. Computerized videokeratography (Orbscan II) was performed in 36 patients with primary pterygia, both before and 1 month after pterygium excision with limbal-conjunctival autografting. The topographic parameters were compared. Spatial contrast sensitivity testing was performed using VCTS 6500. Differences between preoperative and postoperative values were evaluated statistically.Results: The mean Sim K astigmatism and irregularity index, significantly decreased after pterygium surgery. The mean refractive power significantly increased after the operation. The &ldquo;with-the-rule&rdquo; astigmatism induced by pterygium became &ldquo;against-the-rule&rdquo; astigmatism after pterygium removal (P = 0.041). The contrast sensitivity of 6, 12, and 18 cycles per degree, significantly increased from 1.55 &plusmn; 0.28, 0.97 &plusmn; 0.47, and 0.29 &plusmn; 0.16 to 1.72 &plusmn; 0.18, 1.21 &plusmn; 0.44, and 0.65 &plusmn; 0.48, respectively (P = 0.007, &lt;0.001, &lt;0.001, respectively).Conclusions: Pterygium surgery significantly reduces corneal topographic astigmatism and improves contrast sensitivity.Keywords: corneal topography, visual acuity
format	article
author	Joo Youn Oh Won Ryang Wee
author_facet	Joo Youn Oh Won Ryang Wee
author_sort	Joo Youn Oh
title	The effect of pterygium surgery on contrast sensitivity and corneal topographic changes
title_short	The effect of pterygium surgery on contrast sensitivity and corneal topographic changes
title_full	The effect of pterygium surgery on contrast sensitivity and corneal topographic changes
title_fullStr	The effect of pterygium surgery on contrast sensitivity and corneal topographic changes
title_full_unstemmed	The effect of pterygium surgery on contrast sensitivity and corneal topographic changes
title_sort	effect of pterygium surgery on contrast sensitivity and corneal topographic changes
publisher	Dove Medical Press
publishDate	2010
url	https://doaj.org/article/21225b52601e42f18918a606ad6e5d03
work_keys_str_mv	AT jooyounoh theeffectofpterygiumsurgeryoncontrastsensitivityandcornealtopographicchanges AT wonryangwee theeffectofpterygiumsurgeryoncontrastsensitivityandcornealtopographicchanges AT jooyounoh effectofpterygiumsurgeryoncontrastsensitivityandcornealtopographicchanges AT wonryangwee effectofpterygiumsurgeryoncontrastsensitivityandcornealtopographicchanges
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The effect of pterygium surgery on contrast sensitivity and corneal topographic changes

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