IMA Warning: Use of smartphone in the night with one eye
Looking at your smartphone with one eye while lying in bed at night could affect the vision.
New England Journal of Medicine, details cases of the two women, ages 22 and 40, who experienced "transient smartphone blindness" for months from constantly checking their phones in the dark. IMA warns that one should make sure to use both eyes when looking at your smartphone screen in the dark
The women complained of recurring episodes of temporary vision loss for up to 15 minutes. Both women typically looked at their smartphones with only one eye while resting on their side in bed in the dark — their other eye was covered by the pillow.
So they have one eye adapted to the light because it's looking at the phone and the other eye was adapted to the dark. When they put their phone down, they couldn't see with the phone eye.
That's because it takes many minutes to catch up to the other eye that's adapted to the dark.
If not known one may end up in investigating for TIA.