A study in The New England Journal of Medicine titled "Transient Smartphone 'Blindness'" isn't quite as terrifying as the NYPD's warning about cell phones in bed back in February, but it certainly terrified two women enough to seek medical attention.

The study began with the cases of two women—a 22-year-old and a 40-year-old—who both reported recurring instances of temporary blindness at night that could last up to 15 minutes.

Also a medical concern: getting strangled by your headphones.

Both women told researchers that "symptoms occurred only after several minutes of viewing a smartphone screen" with the lights out while chillin' in bed, also known as the most natural activity known to humanity. Is nothing sacred?

An author of the study, Dr. Gordon Plant, told The Guardian that he figured out the problem almost immediately upon talking to the women. “I simply asked them, 'What exactly were you doing when this happened?'” Turns out they were lying down, on their sides, with one eye buried in a pillow and the other peaking out at the glorious glow of the smart phone.

Just keep that lower eye off the pillow.