Sleep deprivation is a public health epidemic causing a number of everyday difficulties, according to the Centers for Disease Control and Prevention. Approximately 50 to 70 million U.S. adults have sleep or wakefulness disorder, which can lead to a number of issues such as lack of concentration, forgetfulness, and even an early death.

According to the Sleep Foundation an average adult needs around seven to eight hours of rest per night. However, many Americans fall short, getting only 60 percent of the recommended hours of sleep.

Richard Wiseman, a professor of the Public Understanding of Psychology at the University of Hertfordshire in the United Kingdom decided to design a test for people to understand if they were getting enough Z’s per night. “Long-term sleep deprivation is associated with poor concentration, weight gain, heart problems, and an early death, so it’s really important that people get enough sleep,” said Wiseman, who is also the author of Night School: Wake Up to the Power of Sleep.

His YouTube video below can show you in 59 seconds if you’re sleep deprived or experiencing “micro-sleeps,” which are quick blackouts that prevent some people from seeing certain things.