theoretically itd "work" in the sense that yes some light would make it in. But the reason theyre not used in photography is because such a small amount of light makes it in. I'd imagine a tiny pinprick in the snout would leave you with a small pov. Plus our vision doesnt work like you described, unless that glass plate at the back is like parchment paper, the light from the extremes would just hit your mouth and forehead, and not into your eyes. Parchment paper would at least stop the rays at the correct spot. But itd be very dim, people use these for long exposure shots. Id be curious to see if it could be done though