Puzzles, Prince, Narci, and Nash don't need glasses at all.
Swag and Unswag are slightly nearsighted. They can get by well enough without their glasses, but they both just prefer wearing them. Saves on headaches and they both like the aesthetics.
Arkham's glasses have hidden bifocals and blue light coating, since he looks at screens a Lot.
YJ doesn't strictly need his glasses. They aren't prescription, but color correction lenses, as YJ is red-green color blind. Specifically, he has protonomaly, which means he doesn't have enough red cones in his eyes. He can see some greens, but they are muted, and basically all reds and oranges just look brown to him. He cannot perceive pink, and his purples are very limited. His glasses increase color contrast so that he can tell reds and oranges apart. They still look brown, but like different browns.
Detective wears little round pince nez for reading.
Helix is nearly blind without her glasses. She made a deal to give up most of her sight in exchange for the ability to speak and understand non-Earth based languages. Her glasses are enchanted to return most of that sight to her, but she is dependent on them.
