Is 15.6" display too small for work?

I m a graphic design student and I am getting a new lap top to work on. I saw very good and powerful lap tops but most of them are with 15.6 inches display or less. I have spoke with a graphic designer and he told me it s too small and with long working sessions my eyes would get tired. Do you guys share the same... show more I m a graphic design student and I am getting a new lap top to work on. I saw very good and powerful lap tops but most of them are with 15.6 inches display or less. I have spoke with a graphic designer and he told me it s too small and with long working sessions my eyes would get tired. Do you guys share the same opinion, should I look for 17" displays or it won t make any difference?
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