Binocular and monocular resolution thresholds throughout adulthood for luminance-modulated and contrast-modulated noise letters

Contrast-modulated (CM) noise stimuli are thought to be processed in higher, more binocular visual areas compared to luminance-modulated (LM) stimuli, and the ability to perceive them may be more susceptible to ageing. The aim of this study was to determine monocular and binocular resolution thresho...

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Main Authors:	Pui, Juan Woi, Sharanjeet-Kaur, Mohd Izzuddin Hairol
Format:	Article
Language:	English
Published:	Penerbit Universiti Kebangsaan Malaysia 2019
Online Access:	http://journalarticle.ukm.my/14393/ http://journalarticle.ukm.my/14393/ http://journalarticle.ukm.my/14393/1/14%20Pui%20Juan%20Woi.pdf

id	ukm-14393
recordtype	eprints
spelling	ukm-143932020-03-10T02:29:20Z http://journalarticle.ukm.my/14393/ Binocular and monocular resolution thresholds throughout adulthood for luminance-modulated and contrast-modulated noise letters Pui, Juan Woi Sharanjeet-Kaur, Mohd Izzuddin Hairol, Contrast-modulated (CM) noise stimuli are thought to be processed in higher, more binocular visual areas compared to luminance-modulated (LM) stimuli, and the ability to perceive them may be more susceptible to ageing. The aim of this study was to determine monocular and binocular resolution thresholds for LM and CM noise letters throughout adulthood. Resolution thresholds for LM and CM noise letters were measured in 25 participants (age 21-70 years old) under monocular and binocular viewing. Stimuli were H, O, T and V letters created by adding or multiplying a luminance modulation function to a binary white noise carrier to create LM and CM noise letters, respectively. Resolution thresholds, determined using a 2-down-1-up staircase procedure, were lower for LM, than for CM, stimuli in both monocular and binocular viewing conditions (p<0.05). Binocular summation ratio for CM noise letters was significantly higher than that for LM noise letters (p<0.05) but declined rapidly with increasing age. For the youngest age group (20-29 years old), binocular resolution threshold was 39% better (~1.5-line improvement on the clinical letter chart) than monocular resolution threshold for CM noise letters, but only 15% better (~0.5-line improvement) when measured with LM noise letters. Binocular performance for CM noise letters declines at a faster rate with increasing age compared to that for LM noise letters. Visual function measurement with contrast-modulated stimuli might be useful to detect subtle binocular vision anomalies that may occur in early adulthood, which may be missed if measured with luminance-based stimuli alone. Penerbit Universiti Kebangsaan Malaysia 2019-10 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/14393/1/14%20Pui%20Juan%20Woi.pdf Pui, Juan Woi and Sharanjeet-Kaur, and Mohd Izzuddin Hairol, (2019) Binocular and monocular resolution thresholds throughout adulthood for luminance-modulated and contrast-modulated noise letters. Sains Malaysiana, 48 (10). pp. 2185-2190. ISSN 0126-6039 http://www.ukm.my/jsm/malay_journals/jilid48bil10_2019/KandunganJilid48Bil10_2019.htm
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	Contrast-modulated (CM) noise stimuli are thought to be processed in higher, more binocular visual areas compared to luminance-modulated (LM) stimuli, and the ability to perceive them may be more susceptible to ageing. The aim of this study was to determine monocular and binocular resolution thresholds for LM and CM noise letters throughout adulthood. Resolution thresholds for LM and CM noise letters were measured in 25 participants (age 21-70 years old) under monocular and binocular viewing. Stimuli were H, O, T and V letters created by adding or multiplying a luminance modulation function to a binary white noise carrier to create LM and CM noise letters, respectively. Resolution thresholds, determined using a 2-down-1-up staircase procedure, were lower for LM, than for CM, stimuli in both monocular and binocular viewing conditions (p<0.05). Binocular summation ratio for CM noise letters was significantly higher than that for LM noise letters (p<0.05) but declined rapidly with increasing age. For the youngest age group (20-29 years old), binocular resolution threshold was 39% better (~1.5-line improvement on the clinical letter chart) than monocular resolution threshold for CM noise letters, but only 15% better (~0.5-line improvement) when measured with LM noise letters. Binocular performance for CM noise letters declines at a faster rate with increasing age compared to that for LM noise letters. Visual function measurement with contrast-modulated stimuli might be useful to detect subtle binocular vision anomalies that may occur in early adulthood, which may be missed if measured with luminance-based stimuli alone.
format	Article
author	Pui, Juan Woi Sharanjeet-Kaur, Mohd Izzuddin Hairol,
spellingShingle	Pui, Juan Woi Sharanjeet-Kaur, Mohd Izzuddin Hairol, Binocular and monocular resolution thresholds throughout adulthood for luminance-modulated and contrast-modulated noise letters
author_facet	Pui, Juan Woi Sharanjeet-Kaur, Mohd Izzuddin Hairol,
author_sort	Pui, Juan Woi
title	Binocular and monocular resolution thresholds throughout adulthood for luminance-modulated and contrast-modulated noise letters
title_short	Binocular and monocular resolution thresholds throughout adulthood for luminance-modulated and contrast-modulated noise letters
title_full	Binocular and monocular resolution thresholds throughout adulthood for luminance-modulated and contrast-modulated noise letters
title_fullStr	Binocular and monocular resolution thresholds throughout adulthood for luminance-modulated and contrast-modulated noise letters
title_full_unstemmed	Binocular and monocular resolution thresholds throughout adulthood for luminance-modulated and contrast-modulated noise letters
title_sort	binocular and monocular resolution thresholds throughout adulthood for luminance-modulated and contrast-modulated noise letters
publisher	Penerbit Universiti Kebangsaan Malaysia
publishDate	2019
url	http://journalarticle.ukm.my/14393/ http://journalarticle.ukm.my/14393/ http://journalarticle.ukm.my/14393/1/14%20Pui%20Juan%20Woi.pdf
first_indexed	2023-09-18T20:06:58Z
last_indexed	2023-09-18T20:06:58Z
_version_	1777407223402594304

Binocular and monocular resolution thresholds throughout adulthood for luminance-modulated and contrast-modulated noise letters

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