Do you think pure red eyes is typically what blind trolls look like, or it’s just for Terezi and Mindfang since their eyes were burned?

It’s hard to say- Sollux and Folykl both have blacked-out eyes, but they are Goldblood Psionics that are blind! So that could be because their eyes were already a solid color. Mindfang and Terezi are most certainly because they were burnt out. It’s hard to say how just a… Normally-blinded Troll would look.