A protective layer applied to a mobile device’s display designed to mitigate the amount of high-energy visible (HEV) light emitted. These shields function by filtering or absorbing a portion of the blue light spectrum, often cited as a potential disruptor of sleep patterns and contributor to eye strain. As an example, a user experiencing digital eye fatigue after prolonged phone use might consider applying such a shield to their device.
The significance of this technology stems from increasing awareness of the potential physiological effects of prolonged exposure to artificial light sources. Initial interest arose from concerns about melatonin suppression and circadian rhythm disruption. Benefits potentially include reduced eye fatigue, improved sleep quality, and a decreased risk of macular degeneration. The development of this protective measure occurred in parallel with the proliferation of screen-based devices and a growing understanding of the impact of different wavelengths of light on human health.