If this leads to your PhD please give me some credit... I have a chameleon with his right eye scarred over and left eye fine. He has been this way for over a year and is healthy. The funny thing is that despite his right eye being blind he still favors the right side of his body. So he leads with his right hand but all he can really see to the right is what his LEFT eye can catch over his nose. The result is often him going in circles. For example, at his best, the way he climbs up a ficus is to corkscrew up in clockwise spirals. Also whenever he tries to mate he always crawls too far over the female and winds up past her and she "disappears" in his blind spot and he forgets but she is sitting right there like "come on"! I think this accidental experiment sheds some insight on to what chameleons really see -- my idea now is that they do not actively process 2 different images from each eyes but rather favor one particular eye and the other is just on standby until it perceives some movement or something important. In other words, the MIND is in just one eye until they are both brought together like they do before shooting prey. This case also suggest that chameleons favor one side of their bodies like how humans are right or left handed. I know one example is not sufficient to conclude anything but it would surely make a good lab experiment for someone to do -- just make sure you cover the eyes and don't poke them out or I will find you!