A safety post mountable in a post holder includes an elongate tubular member and a locking device arranged inside of the tubular member. More particularly, the present invention relates to certain hydrophilic monomers capable of polymerization to form polymeric compositions having desirable physical characteristics useful in the manufacture of ophthalmic devices. If so, the image is rotated an opposing angle such that the object is parallel to the preferred axis of the image frame. Another operation can be linking the snapshot control to an electronic whiteboard to provide communication between the snapshot control and the electronic whiteboard.