Parabola I believe that sensation you are experiencing is known as the 'third-eye'. I do myself experience that sensation when in photofocus and think it will continue until I permantely fix my left and right eyes in the outer corners of my eyes. For example, when you photofocus your eyes separate as opposed to crossing the eyes where the end up beside the nose. The third-eye is the result of pushing the eyes apart. After enough time of doing this they will permantely end up naturally divergent. Once this happens you will be able to see a whole page clearly, i.e with a single glance you will be able to see a word at the top of the page and a word at the bottom reading them simultaneously.
The only side effect of all this that has come to my attention is your eyes will look differect to everyone elses. People will say, "look at me", and you are looking at them but with your third eye. Your real eyes, and when I say this I mean your iris will be looing out to the left and rigt as in a permanent divergent gaze.