I've been reading A LOT on my iPhone lately since starting to use instapaper. It's been amazing except for only little thing; I get nauseated occasionally stari

I've been reading A LOT on my iPhone lately since starting to use instapaper. It's been amazing except for only little thing; I get nauseated occasionally staring at the screen (especially when moving). The screen is possibly to small or too bright? The form factor might not be quite right.