Effectiveness of the 20-20-20 Rule in Reducing Digital Eye Strain among Adults with Prolonged Screen Exposure: A Prospective Observational Study

Abstract

Background: Digital eye strain (DES) has become highly common concern because of the extensive application of digital devices in the workplace, school, and entertainment. Interventions procedures like the 20-20-20 rule were used. This study intends to determine the 20-20-20 rule result in reducing the adverse effect of digital eye strain in people with extended time on the screen.

Methods: This prospective observational study was conducted over one year in the ophthalmology outpatient department of a tertiary care hospital in Uttar Pradesh to assess the effectiveness of the 20-20-20 rule in reducing digital eye strain among adults with more than four hours of daily screen exposure. Eligible participants aged 18–60 years underwent baseline questionnaire-based assessment, followed by implementation of the intervention and reassessment at six months and one year. Statistical analysis was performed using SPSS with predefined significance criteria.

Results: The findings indicate predominant mobile device usage among participants (140 vs 40 computer users), with most individuals taking regular breaks during screen use (169 vs 11; p < 0.01). Dry eye symptoms were significantly associated with screen exposure (72 vs 108; p = 0.003), whereas headache showed a borderline association (100 vs 80; p = 0.053). Implementation of the 20-20-20 rule resulted in higher symptom relief (105 vs 75; p = 0.004), and maintaining adequate viewing distance further enhanced relief (140 vs 40; p = 0.001).

Conclusion: The study has concluded that adherence to the 20-20-20 rule is significantly associated with reduction in key symptoms of digital eye strain, particularly dry eyes, headache, ocular irritation, and visual fatigue, among adults with prolonged screen exposure.

Keywords: Digital eye strain, 20-20-20 rule, prolonged screen exposure, visual fatigue, occupational ophthalmology