It is in almost every single episode, all seasons. I thought eye surgery and started googling to find an answer, there is no definitive answer. I then went back and watched several episodes where the eye flicker is most notable (Season 5 Episode 7, 7 - 8mins in). In some episodes, like the one I just mentioned, it shows the eye clearly deformed, no iris, a square-like pupil, crystal-like reflections as if the eye was make of glass and had some cracks... This is not simply light reflecting off of a prompter or lighting on stage etc. It is most definitely one of 2 things, either it's put in via editing (ie on purpose), or he is some type of shapeshifter that needs his eye fixed.. The former seems most likely, but science is progressing, time travel already achieved on an atomic scale, keep an open mind. Eyes Wired Open.

It is in almost every single episode, of every season. I thought eye surgery and started googling to find an answer, there is no definitive answer. I then went back and watched several episodes where the eye flicker is most notable (Season 5 Episode 7, 7 - 8mins in). In some episodes, like the one I just mentioned, it shows the eye clearly deformed, no iris, a square-like pupil, crystal-like reflections as if the eye was make of glass and had some cracks... This is not simply light reflecting off of a prompter or lighting on stage etc. It is most definitely one of 2 things, either it's put in via editing (i.e. on purpose), or he is some type of shapeshifter that needs his eye fixed. The former seems most likely, but science is progressing, time travel was already achieved on an atomic scale, keep an open mind. Eyes Wired Open.