The use of electronic devices with light-emitting screens has been increasing exponentially over the past decade. Exposure to light at night suppresses the production of the sleep-stimulating hormone melatonin and causes circadian rhythm disturbances, including sleep impairment. Melatonin production is most strongly suppressed by the blue component of the light spectrum. The use of lenses that block blue light (Blue Blocker Glasses) is a little-studied, yet relevant area. The article contains an overview of studies on the use of this method. It may be effective in normalizing circadian rhythms for people who already have sleep problems, but may have no significant effect for people without such problems. An analysis of the studies showed that a more in-depth study of the effectiveness of this approach is required: a larger number of subjects and improved methods for analyzing such indicators as the level of external illumination, spectral composition, melatonin secretion and other factors.