Dr Eli Peli has told Betabeat that Google Glass can cause eye pain. This is due to Glass requiring the user to look off the side to the right eye. Your eye is not trained to look at the far off corner for so long that the eye becomes fatigued. Users have been reported getting headaches from wearing Google Glass. Peli says it’s not really a headache but eye muscles feeling discomfort. Peli says that after a week of use your eye will adjust to this and the pain will go away.
via Business Insider