An interesting thought but if that were true, wouldn’t he be wearing them all the time? Or at least when he’s looking at art? I mean he’s put them on just for this meeting with Pryce.
I think his eyes would naturally filter out some red light and to see in infrared, he would have to have an extra cone in each eye, which means Thrawn would see more colours than we do. However, let me propose an alternative use for the green glasses:
Can’t miss an ep of Antique Roadshow for this nonsense now can we? XD