Which sense is the most affected when it comes to sleeping? This is a sleep ASMR blog, so you might think sound, but it can’t be denied that your sight is also critical here. A lot of people are sensitive to light. For some people, having too much light can stop them from falling asleep. Having light shine into some people’s eyes can actually make them fall asleep, i.e. if you’re at the beach and the sun shines into your eyes, this might happen.

At any rate, this phenomenon is exploited in sleep ASMR eye exam videos. Have a watch, let me know if these actually make you feel sleepy.