Blue light blocking refers to the use of special lenses or filters designed to reduce exposure to blue light emitted by digital screens, such as those on smartphones, tablets, and computers. Blue light can contribute to digital eye strain, which may cause discomfort, fatigue, and difficulty sleeping. Many people use blue light blocking glasses or software applications that adjust screen colors to minimize blue light exposure, especially during evening hours. This practice aims to improve visual comfort and promote better sleep quality by reducing the impact of blue light on the body's natural circadian rhythms.