I have found tonight I cannot read my fire tablet with it resting on my lap,I have to hold it closer to my face,this also explains blurredness just a few feet in front of me,but long distance is spot on,I can see another eye test coming up.Well I find out tomorrow,not going t have blurred vision.Back from opticians,and because I have to wear my other glasses to watch telly,I have found a fault with one of the arms,now got to go back tomorrow,glasses style 10 out of 10,quality checking nil zero zilch very bad,it is a really bad twist.