Watch this: Benefits of a Sleep Mask: How Light Affects Your Sleep
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A sleep mask is an accessory that can help you fall asleep at night. Its design blocks out light, and if the sides are large enough to cover your ears, it can even block out noise. A 2010 study found that patients who slept with an eye mask at night spent more time in REM sleep.
The best kind of sleep mask is the one that works best for you. There are sleep masks that help block out light and noise or some that just block out light. You can even find a sleep mask that won't touch your eyes but still block out light. Sleep masks come in memory foam, silk or cotton materials. Take into consideration price and quality.
Sleeping with a face mask can help you sleep better by blocking out light that may disturb your sleep. An eye mask may also help prevent wrinkled around the eyes caused by side sleeping.
Some sleep masks can get caught in your hair, especially if they have velcro straps. In addition, some people don't like the feeling of fabric covering their eyes. They can also cause dry eyes or possible damage to your eyelashes.
Source: cnet.com