Do blue light filter applications improve sleep outcomes? A study of smartphone users’ sleep quality in an observational setting

Abstract

Overview

This research investigates the effectiveness of smartphone blue light filter applications on enhancing sleep quality. The study is positioned within the context of how these filters impact melatonin secretion and overall sleep hygiene.

Methodology

• Participants tracked their smartphone usage and reported through a questionnaire.
• Sleep quality was assessed using the PSQI questionnaire.
• Statistical analysis included an ANOVA test to evaluate the link between blue light filter utilization and sleep quality.

Findings

The use of blue light filters is low, with 9.7% using them consistently and 80% not at all. Participants indicating regular use were predominantly within the 31–40 age group. Overall PSQI scores suggest mixed sleep quality across the study group.

• No strong connection was found between filter use and improved sleep quality parameters universally, although some links were observed in specific age groups.
• Previous literature confirms that physical filters may influence melatonin and improve sleep, but similar benefits from app-based filters remain inconclusive.

Conclusion

The study concludes that while reducing blue light exposure before bedtime is advisable, relying solely on smartphone filter applications may not substantially improve sleep outcomes.