i spend up to 10 hours a day looking at screens. this can’t be good for my eyes. 600 minutes. i will experience headaches from time to time, and even a bit of dizziness or trouble with equilibrium. this morning i was pulling up a sock while standing on one leg, and i almost fell. do i blame this on the screens? yes. do i have empirical evidence? no. could it be something worse? i hope not. i can only imagine typing up my books on my old Royal typewriter, what a dream! the down side to the dream is the editing process. what a nightmare.