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The effect of blue light on sleep
Siebeltová, Kateřina ; Kinkorová, Ivana (advisor) ; Bunc, Václav (referee)
Title: The effect of blue light on sleep Objectives: The aim of the diploma thesis was to determine the effect of blue light on sleep quality. Methods: This is an experiment. 10 probands, whose ages ranged from 18 to 24, took part in the experiment. The participants were represented in the number of 2 men and 8 women. The research was conducted in 3 phases. In the 1st phase, the subjects' monthly sleep was monitored with a watch (Garmin brand). In phase 2, the probands put on red blue light blocking glasses (Tron brand) 1.5 hours before sleep. After 3 months of wearing the glasses, the 3rd phase occurred, in which the monthly sleep was again monitored with a watch (Garmin brand). At the same time, respondents completed the Pittsburgh Sleep Quality Index (PSQI) in the 1st and 5th months. The questionnaire provides scores on seven subscales, including sleep latency, sleep duration, usual sleep efficiency, sleep disturbances, sleep quality, sleep medication use, and daytime dysfunction due to sleepiness. Results: The aim of the work was to determine the effect of blue light on sleep quality. The results show that the goal was confirmed. We set out a research question that was about whether sleep quality differs without and with the use of red blue light blocking glasses. Since there was a change in...
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Blue light-blocking glasses and their effect on sleep quality parameters
Honzíková, Anna ; Levínská, Kateřina (advisor) ; Kolář, Jáchym (referee)
This study focused on sleep and the influence of blue light on sleep quality parameters. The experiment has been set up into a four-week research divided into two phases. Both phases were two weeks long. The first phase was without blue light blocking glasses, and the second phase with the glasses. We also worked with a Garmin smartwatch, sleep diary and standardized Pittsburgh Sleep Index questionnaire (filled out before and after the experiment). Parameters have been collected from a smartwatch (average heart rate, duration of sleep, duration of REM and NREM sleep, time of falling asleep, number of awakenings per night and stress levels), sleep diary (body temperature during night/morning, subjective quality of sleep and tiredness during the) and the Pittsburgh questionnaire. During the phase with glasses, probands had to wear them at least 90 minutes before sleeping. They could take them off only in a room without any artificial light. Every day probands filled up their sleep diary and entered information from their smartwatch. After the experiment, the data from both phases were processed and compared. Statistically significant parameters (p ≤ 0.05) were average heart rate, body temperature measured in the morning, number of awakenings per night, subjective sleep quality, results of a...
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