ha...i can't imagine it is too harmful, I've never heard any warnings or anything. But I'm sure looking into any light for a prolonged time will mess with your eyes.
I feel your concern.. I walk away from fucking around in my box and all white colored things (like my fridge) have a blue glow to them. However, weed is the best defence to glacoma and cadaracks.. so it is quite the catch 22. HAH