I'm curious how people would GM a Blind Vlaka Starshaman Mystic of Desna. Would people tend to let them use their class abilities when outside and under the stars, or would they simply say those class features won't ever work for the character.
Walk the Void, Stargazer, Starry Bond, and Meteor Shower all have effects dependent upon your ability to "see" the stars, and in two of the cases potentially might not do anything at all. I'm assuming "see" in this case means line of sight seeing, rather than being able to see them on your portable computer's screen from a satellite video feed while outside during a completely cloudy day.
Is line of sight to the stars sufficient to activate the powers?
Its a mystic so sensing the stars or hearing the music of the spheres ought to work.
I can't point to a rule that would say line of sight is fine, but that is absolutely how I would run it, anyway. I can't see any way that the game would benefit from making that character's powers permanently unusable.
In a game with a star shaman who is not normally sightless, but has been temporarily blinded, I could see having the inability to see the stars mess with them until they recover be something worth keeping.