Dry Eye Syndrome is caused by a variety of environmental factors but in some cases can become permanent.
If you spend too much time staring at screens without blinking, over time the oil glands in your eyelids that lubricate your eyes can permanently lose function. If that happens you will eventually start to experience itchiness, varying degrees pain and slightly blurred vision. Lubricating drops can moisturize the eye and relieve dry eye symptoms for a few hours.
Just make it illegal for whites to vote, a lot simpler.