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Related Experiment Video

Updated: Sep 8, 2025

A Methodology for Capturing Joint Visual Attention Using Mobile Eye-Trackers
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Digital Eye Strain Monitoring for One-Hour Smartphone Engagement Through Eye Activity Measurement System.

Bhanu Priya Dandumahanti1, Prithvi Krishna Chittoor2, Murali Subramaniyam3

  • 1Department of Computing Technologies, SRM Institute of Science and Technology, Chennai 603203, India; dandumap1@srmist.edu.in.

Journal of Eye Movement Research
|August 29, 2025
PubMed
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Excessive smartphone use, especially social media reels, can cause visual fatigue in young adults due to changes in blinking and pupil dilation. This study developed a system to measure these visual activity changes.

Area of Science:

  • Ophthalmology
  • Human-Computer Interaction
  • Digital Health

Background:

  • Smartphones are integral to daily life, with India having a high user base.
  • Prolonged smartphone use (over 20 min) is linked to health issues, including visual problems from blue light exposure.
  • Digital eyestrain and sleep disturbances are common concerns associated with extended screen time.

Purpose of the Study:

  • To investigate the impact of 1-hour smartphone usage on visual fatigue in young Indian adults.
  • To develop and utilize a portable, low-cost system for measuring visual activity.
  • To analyze how different smartphone activities affect eye metrics.

Main Methods:

  • A novel visual activity measurement system was developed.
  • The system recorded blink rate, inter-blink interval, and pupil diameter.
Keywords:
blink ratedigital eyestrainpupil dilationsmartphone usagevisual fatigue

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  • Eye activity was monitored during 1-hour sessions of e-book reading, video watching, and social media reel consumption.

    • Main Results:

    • Social media reels usage showed significant screen variations.
    • These variations led to increased pupil dilation and a reduced blink rate.
    • An increase in inter-blink interval and pupil dilation was observed, correlating with visual fatigue.

    Conclusions:

    • Continuous screen brightness and intensity changes in social media reels negatively impact visual comfort.
    • Reduced blink rate and altered pupil dynamics are indicators of visual fatigue.
    • The developed system offers a viable method for assessing visual fatigue related to smartphone use.