I have the Ipad and UnrealBook and do fine with the PDF's originally done for my MPP, and I wear glasses. I do have a holder on a mic boom to bring it in close though.
Bernie
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pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact