Blue light filters are tools designed to reduce exposure to blue light emitted by screens, such as those on smartphones, tablets, and computers. Blue light can contribute to eye strain and disrupt sleep patterns, especially when used in the evening. These filters can be software applications or physical screen protectors that adjust the color temperature of the display. Many devices now come with built-in blue light filter settings, allowing users to customize their screen's appearance. By using these filters, individuals may experience less discomfort during prolonged screen time and potentially improve their sleep quality by minimizing blue light exposure before bedtime.