I guess losing your eyes is an exaggeration. My mother used to tell me that my eyes would go square watching TV but they haven't yet
There is definitely a comfort factor, I work on computers all day so I prefer eInk when I get home to get some rest from the glare especially shortly before retiring to bed.
Now my grandmother used to tell my father that reading in low light would make you blind, so take your pick - blindness or square eyes !