This is one of the clearest, highest quality images I've seen so far. IMO you can see the cuts/abrasions on the high points of his right eyebrow, cheekbone and nose.
A fluid would tend to pool in the deeper recesses. The worst burns would presumably happen in those deeper recesses; that's partly why eyes are so often damaged. But if you hit your face, the higher points such as eyebrows and cheekbones, and the bridge of the nose, do tend to be struck first and injured the worst.
This image is even more convincing, IMO, that the injury is likely an impact rather than a burn.
The nature of the injury is important because people need to know what to look out for. A burn would take a long time to heal. A black eye could be gone in a few days.
View attachment 481357