A blindfold is a piece of fabric used to cover the eyes, often employed to block out light. In the context of sleep, a blindfold can help create a dark environment, which is conducive to falling asleep and improving sleep quality. Many people use blindfolds, also known as sleep masks, to enhance their rest, especially in bright or unfamiliar settings. Using a blindfold during sleep can reduce distractions and promote relaxation. It can be particularly beneficial for individuals who struggle with insomnia or have irregular sleep patterns. By minimizing light exposure, a blindfold can help regulate the body's natural sleep-wake cycle, known as the circadian rhythm.