Yes, I understand there's no 'polycarbonate materials'. So either let them make it out of vinyl, or make a polycarbonate material. It's not hurting anyone to have a pair of custom designer shades from your favorite material. The only thing this rule is hurting is the RP.
If I personally were to code it at all, it would be a stock game item, you would need a doctor's evaluation and prescription, and the condition would be not minor and would have other coded effects besides just a perception stat debuff.
Ask ANY tailor who has been a player for more than a few months. Ask any player who attended the last Town Hall meeting in October 2015, at which we told the players about the 1920 questionable tailored objects which Johnny and I audited. Tailoring of metal material is a long, long way off. And it is WELL established that tailors can not create any items which yield coded effects (armor, appearance, agility, etc).
All that is why this one seemingly trivial item isn't something we're going to allow tailors to create.