hello,
yes i know what you mean. yes staying too long in front of the screen may cause eyestrain especially if it is too bright. it may be good if you schedule the times that you spend in front of the pc with your baby. and dont stay too close to the screen as well. i think one of the mom's uploaded the domans dot cards in black that you can download and print and use as a flashcard whenever you dont feel like being in front of the pc....