Study of Lag of Accommodation After Using a Smartphone

Shahri, Rezvaneh Zamani; Jafarzadehpour, Ebrahim; Mirzajani, Ali

doi:10.32598/fdj.4.38

Cited by 2 publications

(1 citation statement)

References 26 publications

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“…Therefore, the pixel format of letters on liquid-crystal display (LCD) displays causes a grater lag compared to the printed materials (23). Likewise, Zamari et al (28) reported a high lag of accommodation after one hour of smartphone use, and the finding is consistent with other studies.…”

Section: Accuracy Of Accommodationsupporting

confidence: 85%

Smartphone Use on Accommodation and Vergence Parameters: A Systematic Review

Chellapan,

Mat Daud,

Narayanasamy

2023

MJMHS

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Introduction: The frequency and the trend of smartphone use increase rapidly, and 85% of Malaysians owns a smartphone and spend an average of 187 minutes per day to use the smartphone. Aims: To evaluate the potential effects of smartphone use on Accommodation and Vergence of the users. Methods: A total of 18 articles were selected in this review following the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines, and the research question was formulated based on the population, intervention, control, and outcomes (PICO) method. This review was registered with PROSPERO (reference number: CRD42022293325). Data Sources: Databases namely PubMed, Web of Science, and Science-Direct were used in the article search using appropriate keywords, phrases, and Medical Subject Heading (MeSH) terms. The inclusion criteria of this review were journal articles published from January 2010 until December 2021 with full articles or abstract in English available. Results: Accommodative function has been reported to changed significantly with 20 minutes of smartphone use, with reduced amplitude, facility, relative and increased lag. In addition, vergence function has been reported to be altered significantly with receded near point of convergence. Conclusion: Smartphone use has an effect on the accommodation and vergence parameters among adults. Assessments of accommodation and vergence parameters need to be conducted in patients with the symptoms of Computer Vision Syndrome to prevent vision problems. Future reviews are required in younger cohorts with various smartphone features.

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Section: Accuracy Of Accommodationsupporting

confidence: 85%

Smartphone Use on Accommodation and Vergence Parameters: A Systematic Review

Chellapan,

Mat Daud,

Narayanasamy

2023

MJMHS

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The Effect of Age and Sex on Ocular Parameters Associated With Smartphone Use Among Students in Malawi: a Cross Sectional Study

Chikuse

Mzumara

Afonne

et al. 2023

Preprint

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Background Globally, the usage of digital screens is on the rise. Students are among the most users of smartphones in pursuit of academic endeavors. However, digital screens can increase the incidence of various ocular problems. Aim The aim of the study was to examine changes associated with accommodation parameters following the usage of smartphone use among university students. Methods This was a cross-sectional study conducted at Mzuzu University. We recruited 77 undergraduate students using a stratified random sampling technique. Then, we measured AF and AA before and after using a smartphone for 30 minutes while reading N8 optotypes held at 40 cm. We measured AA using the pushup method and recorded the result in diopters and AF using flippers and recorded cycles per second. We entered the data in SPSS version 25. Paired t-test was used to investigate pre and post-smartphone use measurements. We ran a person correlation test to analyze the relationship between age and change in parameters. A one-way ANOVA was used to analyze the association with gender. We considered the value of p < 0.05 statistically significant. Results The change between pre and post-smartphone use was statistically significant across all parameters. According to age, all the parameters increased significantly with an increase in age. However, there was no significant association with gender across all parameters. Conclusion Smartphone usage has an effect on the amplitude of accommodation and accommodative changes. The effect of smartphones on accommodation parameters increases with increasing age. Nevertheless, there are no gender-related differences in accommodative changes following smartphone use. Therefore, elderly users of digital devices in universities should visit eye care practitioners for a full eye examination to enable a better experience with digital devices.

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Study of Lag of Accommodation After Using a Smartphone

Cited by 2 publications

References 26 publications

Smartphone Use on Accommodation and Vergence Parameters: A Systematic Review

Smartphone Use on Accommodation and Vergence Parameters: A Systematic Review

The Effect of Age and Sex on Ocular Parameters Associated With Smartphone Use Among Students in Malawi: a Cross Sectional Study

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