How might an inflammed conjunctiva be a good prognostic sign in cases of chemical eye injury?

Chemical injuries are very dangerous in the eye and require prompt treatment with irrigation. An inflamed, red conjunctiva is actually a good sign as it means that the injury wasn’t so bad that it blanched/cooked away the conjunctival and episcleral vessels.

You really have to worry, though, when the cornea is hazy and the conjunctiva looks snow white.