Zardnaar
Legend
If you don't consider characters like Toph the Earthbender as blind because they are generally fully functional and not detrimented by their blindness, then there generally should be no problem.
There could still be a problem of aesthetics though if say there is no narrative earthbending type of thing available for PCs in your Call of Cthulhu campaign.
No idea who that is.
How do such characters work vs effects like blindness and invsability spells though. I can see arguments developing already.
Generally the way I roll is smaller the group more likely to say yes to oddball requests, larger the group more likely to say no RAW.