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Influence of progressive addition lenses on reading posture in myopic children

AIMS: To determine the influence of single-vision lenses (SVLs) and progressive addition lenses (PALs) on the near vision posture of myopic children based on their near phoria. METHODS: Sixty-two myopic children were assigned to wear SVLs followed by PALs. Eighteen children were esophoric (greater t...

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Autores principales: Bao, Jinhua, Wang, Yuwen, Zhuo, Zuopao, Yang, Xianling, Tan, Renjing, Drobe, Björn, Chen, Hao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BMJ Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4975849/
https://www.ncbi.nlm.nih.gov/pubmed/26608026
http://dx.doi.org/10.1136/bjophthalmol-2015-307325
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author Bao, Jinhua
Wang, Yuwen
Zhuo, Zuopao
Yang, Xianling
Tan, Renjing
Drobe, Björn
Chen, Hao
author_facet Bao, Jinhua
Wang, Yuwen
Zhuo, Zuopao
Yang, Xianling
Tan, Renjing
Drobe, Björn
Chen, Hao
author_sort Bao, Jinhua
collection PubMed
description AIMS: To determine the influence of single-vision lenses (SVLs) and progressive addition lenses (PALs) on the near vision posture of myopic children based on their near phoria. METHODS: Sixty-two myopic children were assigned to wear SVLs followed by PALs. Eighteen children were esophoric (greater than +1), 18 were orthophoric (−1 to 1) and 26 were exophoric (less than −1) at near. Reading distance, head tilt and ocular gaze angles were measured using an electromagnetic system after adaptation to each lens type. RESULTS: The lens type did not influence reading distance or head tilt angle (p>0.05 for both), but ocular gaze angle decreased significantly with the PALs (F=9.25, p=0.004). With the PALs, exophoric children exhibited significantly increased head tilt angle (p=0.003) and reduced ocular gaze angle (p=0.004) compared with esophoric children. Near non-exophoric children exhibited similar eye and head postures when wearing SVLs and PALs, whereas exophoric children exhibited reduced ocular gaze angle (t=−3.18, p=0.04) with PALs compared with SVLs. Using PALs for reading, the mean addition power employed by esophoric children was significantly greater than exophoric children (p=0.04). CONCLUSIONS: The lens type and the near phoria state affected near vision posture. During reading, myopic esophoric children used a lower portion of their PALs compared with exophoric children, resulting in greater addition power. These results may partially explain why myopic children with near esophoria exhibited superior treatment effects in myopia control trials using PALs.
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spelling pubmed-49758492016-08-18 Influence of progressive addition lenses on reading posture in myopic children Bao, Jinhua Wang, Yuwen Zhuo, Zuopao Yang, Xianling Tan, Renjing Drobe, Björn Chen, Hao Br J Ophthalmol Clinical Science AIMS: To determine the influence of single-vision lenses (SVLs) and progressive addition lenses (PALs) on the near vision posture of myopic children based on their near phoria. METHODS: Sixty-two myopic children were assigned to wear SVLs followed by PALs. Eighteen children were esophoric (greater than +1), 18 were orthophoric (−1 to 1) and 26 were exophoric (less than −1) at near. Reading distance, head tilt and ocular gaze angles were measured using an electromagnetic system after adaptation to each lens type. RESULTS: The lens type did not influence reading distance or head tilt angle (p>0.05 for both), but ocular gaze angle decreased significantly with the PALs (F=9.25, p=0.004). With the PALs, exophoric children exhibited significantly increased head tilt angle (p=0.003) and reduced ocular gaze angle (p=0.004) compared with esophoric children. Near non-exophoric children exhibited similar eye and head postures when wearing SVLs and PALs, whereas exophoric children exhibited reduced ocular gaze angle (t=−3.18, p=0.04) with PALs compared with SVLs. Using PALs for reading, the mean addition power employed by esophoric children was significantly greater than exophoric children (p=0.04). CONCLUSIONS: The lens type and the near phoria state affected near vision posture. During reading, myopic esophoric children used a lower portion of their PALs compared with exophoric children, resulting in greater addition power. These results may partially explain why myopic children with near esophoria exhibited superior treatment effects in myopia control trials using PALs. BMJ Publishing Group 2016-08 2015-11-25 /pmc/articles/PMC4975849/ /pubmed/26608026 http://dx.doi.org/10.1136/bjophthalmol-2015-307325 Text en Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/ This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
spellingShingle Clinical Science
Bao, Jinhua
Wang, Yuwen
Zhuo, Zuopao
Yang, Xianling
Tan, Renjing
Drobe, Björn
Chen, Hao
Influence of progressive addition lenses on reading posture in myopic children
title Influence of progressive addition lenses on reading posture in myopic children
title_full Influence of progressive addition lenses on reading posture in myopic children
title_fullStr Influence of progressive addition lenses on reading posture in myopic children
title_full_unstemmed Influence of progressive addition lenses on reading posture in myopic children
title_short Influence of progressive addition lenses on reading posture in myopic children
title_sort influence of progressive addition lenses on reading posture in myopic children
topic Clinical Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4975849/
https://www.ncbi.nlm.nih.gov/pubmed/26608026
http://dx.doi.org/10.1136/bjophthalmol-2015-307325
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