~~I'm not autistic (that I know of)~~ (Edit: Just realized this is in the ADHD com not the autism com. No idea why I thought that. I do actually have ADHD) but I do have issues with light sensitivity so I'll often wear sunglasses inside bright buildings. If anyone asks I just tell them my eyes are extra sensitive to light. Nobody's really said anything about it after that. Most people honestly DGAF about what you're doing, they're just curious and sating that curiosity is enough. Those that do actually care and would make a stink over nothing are relatively rare and aren't worth your time or attention.