Determining Near Point of Convergence: Exploring a Component of the Vestibular/Ocular Motor Screen Comparing Varied Target Sizes

# Background Near point of convergence (NPC), a component of the Vestibular Ocular Motor Screening (VOMS) assessment, may be helpful in diagnosing concussion. The VOMS uses a standardized approach to measure NPC; however, methods of screening for NPC are not standardized. # Purpose The purpose of...

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Autores principales:	John D Heick, Curt Bay
Formato:	article
Lenguaje:	EN
Publicado:	North American Sports Medicine Institute 2021
Materias:	Sports medicine RC1200-1245
Acceso en línea:	https://doaj.org/article/4184923f4d034690bb50d42845955b84
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spelling	oai:doaj.org-article:4184923f4d034690bb50d42845955b842021-12-02T16:01:55ZDetermining Near Point of Convergence: Exploring a Component of the Vestibular/Ocular Motor Screen Comparing Varied Target Sizes10.26603/001c.188672159-2896https://doaj.org/article/4184923f4d034690bb50d42845955b842021-02-01T00:00:00Zhttps://ijspt.scholasticahq.com/article/18867-determining-near-point-of-convergence-exploring-a-component-of-the-vestibular-ocular-motor-screen-comparing-varied-target-sizes.pdfhttps://doaj.org/toc/2159-2896# Background Near point of convergence (NPC), a component of the Vestibular Ocular Motor Screening (VOMS) assessment, may be helpful in diagnosing concussion. The VOMS uses a standardized approach to measure NPC; however, methods of screening for NPC are not standardized. # Purpose The purpose of this study was to determine whether four different methods of measuring NPC yielded different estimates. # Study Design Descriptive within-subjects laboratory study. # Level of Evidence Level 3. # Methods Healthy recreational athletes participated in a comparison of 4 commonly used methods of measuring NPC: a 12-point font target, the VOMS (14-point font target), the tip of a black pen, and the Bernell Vergel^TM^ device (9-point font target). The order of the presentation of the 4 targets was randomized. # Results Seventy-five participants (59 females, 16 males; mean \[SD\] age=21.0 [6.12] years) completed 3 trials. The mean (SD) of the 900 NPC measurements was 7.11 (3.67) cm. Measurements for all targets had excellent reliability (r=0.94 to 0.98). In a comparative analysis, participant age was associated with NPC (p<0.01) and was covaried. The NPCs derived from both the 12-point and 14-point font targets were smaller than NPCs from the tip of the black pen and the 9-point font device (p<0.01). Measurements between the tip of the black pen and the 9-point font device (p=0.25) and between the 12-point and 14-point font targets (p=0.84) did not differ. # Conclusions The method used to measure NPC as a screening test for concussion should be standardized because the estimate differs depending on the technique chosen. The current study supports previous findings that the type of target used to measure NPC should be standardized for concussion assessment. # Clinical Relevance Screening of NPC should be standardized for concussion assessment to improve the reliability of NPC testing.John D HeickCurt BayNorth American Sports Medicine InstitutearticleSports medicineRC1200-1245ENInternational Journal of Sports Physical Therapy, Vol 16, Iss 1 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Sports medicine RC1200-1245
spellingShingle	Sports medicine RC1200-1245 John D Heick Curt Bay Determining Near Point of Convergence: Exploring a Component of the Vestibular/Ocular Motor Screen Comparing Varied Target Sizes
description	# Background Near point of convergence (NPC), a component of the Vestibular Ocular Motor Screening (VOMS) assessment, may be helpful in diagnosing concussion. The VOMS uses a standardized approach to measure NPC; however, methods of screening for NPC are not standardized. # Purpose The purpose of this study was to determine whether four different methods of measuring NPC yielded different estimates. # Study Design Descriptive within-subjects laboratory study. # Level of Evidence Level 3. # Methods Healthy recreational athletes participated in a comparison of 4 commonly used methods of measuring NPC: a 12-point font target, the VOMS (14-point font target), the tip of a black pen, and the Bernell Vergel^TM^ device (9-point font target). The order of the presentation of the 4 targets was randomized. # Results Seventy-five participants (59 females, 16 males; mean \[SD\] age=21.0 [6.12] years) completed 3 trials. The mean (SD) of the 900 NPC measurements was 7.11 (3.67) cm. Measurements for all targets had excellent reliability (r=0.94 to 0.98). In a comparative analysis, participant age was associated with NPC (p<0.01) and was covaried. The NPCs derived from both the 12-point and 14-point font targets were smaller than NPCs from the tip of the black pen and the 9-point font device (p<0.01). Measurements between the tip of the black pen and the 9-point font device (p=0.25) and between the 12-point and 14-point font targets (p=0.84) did not differ. # Conclusions The method used to measure NPC as a screening test for concussion should be standardized because the estimate differs depending on the technique chosen. The current study supports previous findings that the type of target used to measure NPC should be standardized for concussion assessment. # Clinical Relevance Screening of NPC should be standardized for concussion assessment to improve the reliability of NPC testing.
format	article
author	John D Heick Curt Bay
author_facet	John D Heick Curt Bay
author_sort	John D Heick
title	Determining Near Point of Convergence: Exploring a Component of the Vestibular/Ocular Motor Screen Comparing Varied Target Sizes
title_short	Determining Near Point of Convergence: Exploring a Component of the Vestibular/Ocular Motor Screen Comparing Varied Target Sizes
title_full	Determining Near Point of Convergence: Exploring a Component of the Vestibular/Ocular Motor Screen Comparing Varied Target Sizes
title_fullStr	Determining Near Point of Convergence: Exploring a Component of the Vestibular/Ocular Motor Screen Comparing Varied Target Sizes
title_full_unstemmed	Determining Near Point of Convergence: Exploring a Component of the Vestibular/Ocular Motor Screen Comparing Varied Target Sizes
title_sort	determining near point of convergence: exploring a component of the vestibular/ocular motor screen comparing varied target sizes
publisher	North American Sports Medicine Institute
publishDate	2021
url	https://doaj.org/article/4184923f4d034690bb50d42845955b84
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Determining Near Point of Convergence: Exploring a Component of the Vestibular/Ocular Motor Screen Comparing Varied Target Sizes

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