Recently I have been hearing family members, frieds and co-workers grumbles about portable phones adn tablet type things causing health issues from an ergonomic standpoint; wrist, elbow, shoulder and neck issues. Along with that eye strain and possibly affecting the eyes such as straining and causing the need for glasses or bifocals. I would like to avoid this discussion from being a source checking (provide a link or it's untrue) I would like to see it real life user experience. My experieince has been rather interesting. Relatives where both parents do not need glasses, 2 kids that didn't wear glasses. Then 18 to 24 months after using hand help devices the kids started to complain the board at school was blurry. Both started wearing glasses. Parents only allow tablets or full size computers and limit the usage of both. Me, I have noticed wirst fatigue and neck strain while using a tablet. Also, eye straining when using a smart phone device. One of the mot surpising things I have heard is thumb strain. I noticed when I text my thumb is rotating more so. I have also correlated a lot of gaming to thumb discomfort and elbow discomfort. What say you?