Oh, ouch, yeah chemical blindness would NOT be fun. Scarring, burning, just…not nice things.
All in all, I think the team would handle it really well. Honey Lemon seems like the cheerful sort who will bounce back from anything, although obviously she wouldn’t be immediately okay. I figure she’d do her best to keep up her spirits to make sure the rest of the team doesn’t worry too much. GoGo, of course, will see right through her, but she also understands what Honey’s trying to do so she doesn’t call her on it. She offers a lot of support in private though, and becomes super overprotective.
Fred I think would obviously be super generous without even having to think about it. He would pay for the plastic surgery she’d probably need for the chemical burns, hire someone to teach Honey how to read braille, and pay for any equipment she needs such as a cane or seeing eye dog. He’d offer her whatever she needed, and would refuse to treat her differently. I figure he canonically does a lot of charity and volunteer work, it’s completely possible that he’s worked with the blind before and puts that experience to good use.
Wasabi would be really awkward around her at first, treating her like glass, which would probably annoy her a bit. But he’s also the one that organizes the lab and her home so that she can learn to navigate based on her memory of where things are, and he’s very fanatic about keeping things in their place so she won’t trip on them or run into them.
Hiro would also be really nervous and awkward around her as well for a bit, especially as he’s still at that age where he thinks everyone is invincible. He also naturally tries to invent something to get her sight back, spending many sleepless nights on his project. Maybe he succeeds, maybe he doesn’t, but Honey Lemon really appreciates that he’s trying.
And I’m sure Tadashi programmed Baymax to deal with blind patients, so he’s probably the most equipped out of any of them to deal with the situation. He handles it like a champ, and kind of becomes a rock for everyone as they learn to deal.