It looks like their “infrared sight” is good enough to make out various shapes, too. In a third experiment, the researchers put them into a Y-shaped maze. The mice were trained to find a hidden platform that was associated with one or two specific patterns. The same patterns were projected onto one end of the maze using infrared light, and the bionic mice were able to find the hidden platform whereas the normal, plain mice could not.

What’s more interesting is that their super infrared vision lasted up to ten weeks with few harmful effects. “Endowing mammals with [near-infrared] vision capacity could also pave the way for critical civilian and military applications,” the researchers wrote in the paper.

https://www.theregister.co.uk/2019/03/01/danger_mouse_infrared/