To anyone who just like me wondered about why couldn't Tartah just get some glasses, especially after this page with Qifrey
Leaving all problems with the amounts of money this could ever cost, what's so wrong with getting it?
So I decided to read about achromatopsia (the most similar disease to silverwash we have)
And here the differences begin. Achromatopsia comes with many other eye conditions (like really bad eyesight, fear of light because of sensitivity to it, involuntary eye movements). Tartah doesn't have all of this, he just can't see colors, so most likely silverwash is silverwash as an unknown to us magical disease in their world.
And getting to the point, achromatopsia is an inherited genetic disorder that prevents the cone cells in the retina from functioning properly. Our world do have glasses for colorblind people, but it works only for people with red-green color blindness.
So no focusing of light and multilayer filter can do it for him... Or there's something magical in their world I don't actually know about and we need to blame it on witch society again, so yeah. Think as you want to.
Try to imagine forbidden spell on his eyelids.
Don't want this to happen because in reality it would probably hurt him in every ways possible, but I think it still interesting enough













