Can we take a thin mesh(so light still gets through) and cover it with some kind of nontoxic pigment that will flouresce under infrared light, then attach that mesh over a contact lense. That would allow you to see where the infrared is coming from. This is just an idea I had when I woke up. I am probably not going to do this myself so feel free to criticize/suggest/destroy/try your self. Just wondering if this could be done. I don't have the recources for this at the moment.