Comparison of phoropter and trial frame-based von Graefe heterophoria measures in non-presbyopic participants

Background: There are several clinical techniques for the subjective measurement of heterophoria. In South Africa, von Graefe (VG) is a commonly used technique to quantify heterophoria using the phoropter. Purpose: The purpose of the study was to investigate the agreement of VG heterophoria measure...

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Autores principales:	Annah L. Tsotetsi, Solani D. Mathebula
Formato:	article
Lenguaje:	EN
Publicado:	AOSIS 2021
Materias:	heterophoria phoropter trial frame von graefe prism Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/a6ddb6eda2734359af7c102cb8c85b4b
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spelling	oai:doaj.org-article:a6ddb6eda2734359af7c102cb8c85b4b2021-11-24T07:40:34ZComparison of phoropter and trial frame-based von Graefe heterophoria measures in non-presbyopic participants2413-31832410-151610.4102/aveh.v80i1.645https://doaj.org/article/a6ddb6eda2734359af7c102cb8c85b4b2021-11-01T00:00:00Zhttps://avehjournal.org/index.php/aveh/article/view/645https://doaj.org/toc/2413-3183https://doaj.org/toc/2410-1516Background: There are several clinical techniques for the subjective measurement of heterophoria. In South Africa, von Graefe (VG) is a commonly used technique to quantify heterophoria using the phoropter. Purpose: The purpose of the study was to investigate the agreement of VG heterophoria measurement using the phoropter and a trial frame. Setting: The study was conducted at an Optometry Clinic, University of Limpopo, South Africa. Methods: Both distance and near horizontal and vertical heterophoria VG measurements were performed on 88 visually-normal university students using the phoropter and trial frame. The handheld rotary prism was used on the trial frame. The 95% limits of agreement in prism diopters were compared using the Bland-Altman statistical test. Results: For distance horizontal heterophoria, the VG means were 0.39 exophoria ± 2.0Δ and 0.38 exophoria ± 1.8Δ with the phoropter and trial frame respectively. The means for near horizontal heterophoria were 3.69 exophoria ± 3.3Δ and 4.13 exophoria ± 3.27Δ with the phoropter and trial frame. For the vertical heterophoria at distance, the means and standard deviations were 0.18 hyperphoria ± 0.74 and 0.13 hyperphoria ± 0.07Δ, while at near vision they were 0.03 hyperphoria ± 0.71 and 0.07 hyperphoria ± 0.71Δ, respectively. Conclusion: Measurement of VG heterophoria testing using the phoropter and trial frame showed a high level of agreement for both distance and near vision performed through the phoropter and a trial frame. For clinical and research purposes, the phoropter and trial frame can be used interchangeably for measuring heterophoria.Annah L. TsotetsiSolani D. MathebulaAOSISarticleheterophoriaphoroptertrial framevon graefeprismOphthalmologyRE1-994ENAfrican Vision and Eye Health, Vol 80, Iss 1, Pp e1-e9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	heterophoria phoropter trial frame von graefe prism Ophthalmology RE1-994
spellingShingle	heterophoria phoropter trial frame von graefe prism Ophthalmology RE1-994 Annah L. Tsotetsi Solani D. Mathebula Comparison of phoropter and trial frame-based von Graefe heterophoria measures in non-presbyopic participants
description	Background: There are several clinical techniques for the subjective measurement of heterophoria. In South Africa, von Graefe (VG) is a commonly used technique to quantify heterophoria using the phoropter. Purpose: The purpose of the study was to investigate the agreement of VG heterophoria measurement using the phoropter and a trial frame. Setting: The study was conducted at an Optometry Clinic, University of Limpopo, South Africa. Methods: Both distance and near horizontal and vertical heterophoria VG measurements were performed on 88 visually-normal university students using the phoropter and trial frame. The handheld rotary prism was used on the trial frame. The 95% limits of agreement in prism diopters were compared using the Bland-Altman statistical test. Results: For distance horizontal heterophoria, the VG means were 0.39 exophoria ± 2.0Δ and 0.38 exophoria ± 1.8Δ with the phoropter and trial frame respectively. The means for near horizontal heterophoria were 3.69 exophoria ± 3.3Δ and 4.13 exophoria ± 3.27Δ with the phoropter and trial frame. For the vertical heterophoria at distance, the means and standard deviations were 0.18 hyperphoria ± 0.74 and 0.13 hyperphoria ± 0.07Δ, while at near vision they were 0.03 hyperphoria ± 0.71 and 0.07 hyperphoria ± 0.71Δ, respectively. Conclusion: Measurement of VG heterophoria testing using the phoropter and trial frame showed a high level of agreement for both distance and near vision performed through the phoropter and a trial frame. For clinical and research purposes, the phoropter and trial frame can be used interchangeably for measuring heterophoria.
format	article
author	Annah L. Tsotetsi Solani D. Mathebula
author_facet	Annah L. Tsotetsi Solani D. Mathebula
author_sort	Annah L. Tsotetsi
title	Comparison of phoropter and trial frame-based von Graefe heterophoria measures in non-presbyopic participants
title_short	Comparison of phoropter and trial frame-based von Graefe heterophoria measures in non-presbyopic participants
title_full	Comparison of phoropter and trial frame-based von Graefe heterophoria measures in non-presbyopic participants
title_fullStr	Comparison of phoropter and trial frame-based von Graefe heterophoria measures in non-presbyopic participants
title_full_unstemmed	Comparison of phoropter and trial frame-based von Graefe heterophoria measures in non-presbyopic participants
title_sort	comparison of phoropter and trial frame-based von graefe heterophoria measures in non-presbyopic participants
publisher	AOSIS
publishDate	2021
url	https://doaj.org/article/a6ddb6eda2734359af7c102cb8c85b4b
work_keys_str_mv	AT annahltsotetsi comparisonofphoropterandtrialframebasedvongraefeheterophoriameasuresinnonpresbyopicparticipants AT solanidmathebula comparisonofphoropterandtrialframebasedvongraefeheterophoriameasuresinnonpresbyopicparticipants
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Comparison of phoropter and trial frame-based von Graefe heterophoria measures in non-presbyopic participants

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