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Changes in vergence and accommodation parameters after smartphone use in healthy adults
PURPOSE: To assess pre and post vergence and accommodation parameters after monitored reading on a smartphone device. METHODS: This prospective comparative study was performed in a tertiary eye care center for a duration of 6 months (December 2017 – May 2018). A total of 47 healthy emmetropic subjec...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Wolters Kluwer - Medknow
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8302311/ https://www.ncbi.nlm.nih.gov/pubmed/34011725 http://dx.doi.org/10.4103/ijo.IJO_2956_20 |
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author | Padavettan, Chitra Nishanth, Shruti Vidhyalakshmi, S Madhivanan, Nishanth Madhivanan, Nivean |
author_facet | Padavettan, Chitra Nishanth, Shruti Vidhyalakshmi, S Madhivanan, Nishanth Madhivanan, Nivean |
author_sort | Padavettan, Chitra |
collection | PubMed |
description | PURPOSE: To assess pre and post vergence and accommodation parameters after monitored reading on a smartphone device. METHODS: This prospective comparative study was performed in a tertiary eye care center for a duration of 6 months (December 2017 – May 2018). A total of 47 healthy emmetropic subjects of age group ranging from 18-30 years were recruited for the study. Participants underwent an initial visual screening protocol, followed by accommodation and vergence parameters assessment. The subjects were given reading text of optotype N6 at 40cm working distance for 30 minutes in a smart phone device. Pre and post measurements were documented. RESULTS: Among 47 subjects there were 17 male and 30 females with mean age group of 21.2+2.06 years. There was a statistically significant worsening of accommodative components (negative & positive relative accommodation, lag of accommodation). In vergence parameters, a statistically significant deterioration of negative (12.8 + 1.65 to 12.38 + 1.93 PD) and positive fusional vergence (15.48 + 1.53 to 16.08 +1.61 PD) was observed. The mean vergence facility also showed a statistically significant change in pre and post task measurements (13.51 + 1.64 to 10.71 + 1.91 cpm (cycles per minute)). CONCLUSION: The current study investigated that perusing text with a smart phone for 30 minutes shows significant effect on accommodative and vergence components for near task, with greater impact on vergence parameters. Drawn out exposure to digital screens at near, may bring about visual quality dysfunction. |
format | Online Article Text |
id | pubmed-8302311 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Wolters Kluwer - Medknow |
record_format | MEDLINE/PubMed |
spelling | pubmed-83023112021-08-02 Changes in vergence and accommodation parameters after smartphone use in healthy adults Padavettan, Chitra Nishanth, Shruti Vidhyalakshmi, S Madhivanan, Nishanth Madhivanan, Nivean Indian J Ophthalmol Original Article PURPOSE: To assess pre and post vergence and accommodation parameters after monitored reading on a smartphone device. METHODS: This prospective comparative study was performed in a tertiary eye care center for a duration of 6 months (December 2017 – May 2018). A total of 47 healthy emmetropic subjects of age group ranging from 18-30 years were recruited for the study. Participants underwent an initial visual screening protocol, followed by accommodation and vergence parameters assessment. The subjects were given reading text of optotype N6 at 40cm working distance for 30 minutes in a smart phone device. Pre and post measurements were documented. RESULTS: Among 47 subjects there were 17 male and 30 females with mean age group of 21.2+2.06 years. There was a statistically significant worsening of accommodative components (negative & positive relative accommodation, lag of accommodation). In vergence parameters, a statistically significant deterioration of negative (12.8 + 1.65 to 12.38 + 1.93 PD) and positive fusional vergence (15.48 + 1.53 to 16.08 +1.61 PD) was observed. The mean vergence facility also showed a statistically significant change in pre and post task measurements (13.51 + 1.64 to 10.71 + 1.91 cpm (cycles per minute)). CONCLUSION: The current study investigated that perusing text with a smart phone for 30 minutes shows significant effect on accommodative and vergence components for near task, with greater impact on vergence parameters. Drawn out exposure to digital screens at near, may bring about visual quality dysfunction. Wolters Kluwer - Medknow 2021-06 2021-05-21 /pmc/articles/PMC8302311/ /pubmed/34011725 http://dx.doi.org/10.4103/ijo.IJO_2956_20 Text en Copyright: © 2021 Indian Journal of Ophthalmology https://creativecommons.org/licenses/by-nc-sa/4.0/This is an open access journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms. |
spellingShingle | Original Article Padavettan, Chitra Nishanth, Shruti Vidhyalakshmi, S Madhivanan, Nishanth Madhivanan, Nivean Changes in vergence and accommodation parameters after smartphone use in healthy adults |
title | Changes in vergence and accommodation parameters after smartphone use in healthy adults |
title_full | Changes in vergence and accommodation parameters after smartphone use in healthy adults |
title_fullStr | Changes in vergence and accommodation parameters after smartphone use in healthy adults |
title_full_unstemmed | Changes in vergence and accommodation parameters after smartphone use in healthy adults |
title_short | Changes in vergence and accommodation parameters after smartphone use in healthy adults |
title_sort | changes in vergence and accommodation parameters after smartphone use in healthy adults |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8302311/ https://www.ncbi.nlm.nih.gov/pubmed/34011725 http://dx.doi.org/10.4103/ijo.IJO_2956_20 |
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