Well, potential spoiler alert, possibly, maybe.
Actor Maisie Williams' social media might have some clues about the next season of Game of Thrones. No, she didn't tweet a photo of Jon Snow being alive. But she did post an Instagram photo of herself wearing under-eye masks and wrote "aftermath of blind contacts." She also posted this video, which shows how irritated her eyes are and what her real-life friendship with Sophie Turner (who plays Sansa) is like.
So it seems that when Arya was [spoilers] blinded in the season finale after boldly doing her own thing while training to become one of the Faceless Men, it wasn't just a quick little punishment to teach her a lesson. It's still unclear whether she is permanently blind or if it could eventually be reversed, but these posts confirm that Arya, sadly, still can't see in season six. On the bright side, someone made a 40-minute loop of her "oysters, clams, and cockles" chant.