چکیده

Background: Using electronic devices such as smartphones, tablets, and laptops that emit light predominantly at short-wavelengths (~blue region of the visible light spectrum) at dim light before bedtime could lead to sleep disorders. Mortazavi et al. have previously shown that sleep quality in smartphone users could be significantly improved by placing blue-blocking filters (e.g. amber filters) on the digital screens. It is worth noting that through suppressing the production of melatonin; the known sleep-inducing hormone, exposure to blue light before sleep may cause sleep problems. Given this consideration, filtering blue light can help people sleep better. In modern smartphones, there are different applications that filter blue light by shifting the color spectrum of digital screens. Despite what you see in commercials, there are reports on the low efficacy of these applications. This paper is an attempt to investigate the efficacy of blue-light filtering apps on the quality of sleep of thin a very large cohort of users. Methods: This cohort study was performed on 2795 employees of the Shiraz University of Medical Science. Besides collecting demographic and smartphone usage data, the Pittsburgh Sleep Quality Questionnaire was used to assess the quality of sleep of all participants. Statistical analysis performed using SPSS version 22. Results: Comparison of the mean PSQI scores in participants who used blue light filters (6.63±3.55) and those never used these filters (6.67±3.51), failed to show a statistically significant difference (p = 0.925). Conclusion: While the efficacy of using physical blue-blocking filters was proven in our previous experiments, the commercial blue-blocking filters provided by the manufactures of smartphones failed to enhance the sleep quality. Given this consideration, people can be advised to either place blue filters on their smartphones’ screens or use amber glasses when they want to use their smartphones at dim light before bedtime.

کليدواژه ها

smartphone,blue light filter,sleep quality,suppressing melatonin

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سیدمحمدجواد مرتضوی , 1400 , عدم کارایی اپلیکیشن های فیلترکننده نور آبی در بهبود کیفیت خواب افرادی که در ساعات قبل ازخواب و در شرایط نوری کم از گوشی هوشمند استفاده می کنند , ششمین کنفرانس(مجازی) سنجش و ایمنی پرتوهای یونساز و غیر یونساز