I heard that if you ascend to God Tier, you will be healed. Like Vriska - she losts her arm and eye. But when you ascend you're become your dream-self, right? Vriska's dream self still had eye and arm, so God Tier Vriska also had. What about Terezi? Her dreamself was also blind. Is that true, about healing?

Injuries that you want to be healed will be. Terezi wanted to stay blind so she would have stayed blind.