Yes, this habit can actually bring harm to eye health.
These conditions have occurred in two women from England and Asia, the age of 22 and 40 years, who claimed to lose sight of the temporary, after seeing their smartphone before going to bed.
"They admitted blind at least for 15 minutes after playing smartphone in a dark room while lying in bed".
To explain the case in detail, doctors and researchers published it last Thursday in the New England Journal of Medicine.
After two people complained of temporary loss of vision for up to 15 minutes, they were required to undergo a series of medical examinations, MRI scans, and heart tests.
However, doctors found nothing wrong with the health of the two men.
However, when the patient is taken to the eye specialist office, the mystery begins to solve. "I just ask them: What do you really do when blindness happens?" Said Dr. Gordon Plant of Moorfield Eye Hospital in London.
He explained that the two women had often seen the smartphone in a tilted position so that it unconsciously only uses one eye-because the other eye is covered by a pillow-while looking at a smartphone in the dark bedroom. "So only one eye is adjusted to light while the other eye is adjusted to the darkness," he continued.
So, when the smartphone is turned off, one of the eyes that had seen the bright light of the phone, can not adapt directly with the darkness.
So the eye needs to adapt to change and cause temporary blindness.
But Plant said, temporary blindness is actually easy to avoid, if one sees a smartphone in a dark room with both eyes.