Different fixation targets affect retinal sensitivity obtained by microperimetry in normal individuals

Tomohiro Nizawa, Takayuki Baba, Masayasu Kitahashi, Toshiyuki Oshitari, Shuichi Yamamoto Department of Ophthalmology and Visual Science, Chiba University Graduate School of Medicine, Chiba, Japan Purpose: To determine the differences in the retinal sensitivities obtained by microperimetry with a s...

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Autores principales:	Nizawa T, Baba T, Kitahashi M, Oshitari T, Yamamoto S
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2017
Materias:	microperimetry retinal sensitivity fixation targets stimuli Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/f978b84ca2a04e80ad474d4cd5620b62
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spelling	oai:doaj.org-article:f978b84ca2a04e80ad474d4cd5620b622021-12-02T07:59:01ZDifferent fixation targets affect retinal sensitivity obtained by microperimetry in normal individuals1177-5483https://doaj.org/article/f978b84ca2a04e80ad474d4cd5620b622017-11-01T00:00:00Zhttps://www.dovepress.com/different-fixation-targets-affect-retinal-sensitivity-obtained-by-micr-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Tomohiro Nizawa, Takayuki Baba, Masayasu Kitahashi, Toshiyuki Oshitari, Shuichi Yamamoto Department of Ophthalmology and Visual Science, Chiba University Graduate School of Medicine, Chiba, Japan Purpose: To determine the differences in the retinal sensitivities obtained by microperimetry with a single cross or a circular fixation target in normal individuals.Methods: Thirty-two eyes of 16 healthy volunteers (mean age 28.9±1.4 years, range 24–44 years) were studied. The retinal sensitivity of the central 0 degrees and of the mean central 2 degrees consisting of 8 points were determined independently using the two different fixation targets with Microperimeter 3. The Goldmann III stimulus with a luminance of 1.0 cd/m2 was presented for 200 ms on a white background.Results: The retinal sensitivity of the central 0 degrees was significantly better with the circular target than that with the cross target (P=0.003, right eyes; P=0.001, left eyes). The mean retinal sensitivity in the central 2 degrees was not significantly different between the cross and circular fixation targets. (P=0.07, right eyes; P=0.08, left eyes).Conclusion: These results indicate that the circular fixation target is a better target to use to evaluate the central retinal sensitivity. The difference in the retinal sensitivity is most likely due to the cross fixation target overlapping the test stimulus target. Keywords: microperimetry, retinal sensitivity, fixation targets, stimuliNizawa TBaba TKitahashi MOshitari TYamamoto SDove Medical Pressarticlemicroperimetryretinal sensitivityfixation targetsstimuliOphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 11, Pp 2011-2015 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	microperimetry retinal sensitivity fixation targets stimuli Ophthalmology RE1-994
spellingShingle	microperimetry retinal sensitivity fixation targets stimuli Ophthalmology RE1-994 Nizawa T Baba T Kitahashi M Oshitari T Yamamoto S Different fixation targets affect retinal sensitivity obtained by microperimetry in normal individuals
description	Tomohiro Nizawa, Takayuki Baba, Masayasu Kitahashi, Toshiyuki Oshitari, Shuichi Yamamoto Department of Ophthalmology and Visual Science, Chiba University Graduate School of Medicine, Chiba, Japan Purpose: To determine the differences in the retinal sensitivities obtained by microperimetry with a single cross or a circular fixation target in normal individuals.Methods: Thirty-two eyes of 16 healthy volunteers (mean age 28.9±1.4 years, range 24–44 years) were studied. The retinal sensitivity of the central 0 degrees and of the mean central 2 degrees consisting of 8 points were determined independently using the two different fixation targets with Microperimeter 3. The Goldmann III stimulus with a luminance of 1.0 cd/m2 was presented for 200 ms on a white background.Results: The retinal sensitivity of the central 0 degrees was significantly better with the circular target than that with the cross target (P=0.003, right eyes; P=0.001, left eyes). The mean retinal sensitivity in the central 2 degrees was not significantly different between the cross and circular fixation targets. (P=0.07, right eyes; P=0.08, left eyes).Conclusion: These results indicate that the circular fixation target is a better target to use to evaluate the central retinal sensitivity. The difference in the retinal sensitivity is most likely due to the cross fixation target overlapping the test stimulus target. Keywords: microperimetry, retinal sensitivity, fixation targets, stimuli
format	article
author	Nizawa T Baba T Kitahashi M Oshitari T Yamamoto S
author_facet	Nizawa T Baba T Kitahashi M Oshitari T Yamamoto S
author_sort	Nizawa T
title	Different fixation targets affect retinal sensitivity obtained by microperimetry in normal individuals
title_short	Different fixation targets affect retinal sensitivity obtained by microperimetry in normal individuals
title_full	Different fixation targets affect retinal sensitivity obtained by microperimetry in normal individuals
title_fullStr	Different fixation targets affect retinal sensitivity obtained by microperimetry in normal individuals
title_full_unstemmed	Different fixation targets affect retinal sensitivity obtained by microperimetry in normal individuals
title_sort	different fixation targets affect retinal sensitivity obtained by microperimetry in normal individuals
publisher	Dove Medical Press
publishDate	2017
url	https://doaj.org/article/f978b84ca2a04e80ad474d4cd5620b62
work_keys_str_mv	AT nizawat differentfixationtargetsaffectretinalsensitivityobtainedbymicroperimetryinnormalindividuals AT babat differentfixationtargetsaffectretinalsensitivityobtainedbymicroperimetryinnormalindividuals AT kitahashim differentfixationtargetsaffectretinalsensitivityobtainedbymicroperimetryinnormalindividuals AT oshitarit differentfixationtargetsaffectretinalsensitivityobtainedbymicroperimetryinnormalindividuals AT yamamotos differentfixationtargetsaffectretinalsensitivityobtainedbymicroperimetryinnormalindividuals
_version_	1718398761600811008

Different fixation targets affect retinal sensitivity obtained by microperimetry in normal individuals

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