A nonessential suggestion designed to throw even more random variety into a town. Meant as a place for npcs to get glasses, Eye Clinics hold information on a citizen's name, eye colour, and prescription. Eye clinics have a small footprint, so they can take up the space of an apartment room or basement or something.
Ultimately this idea is meant to provide another way to follow up on leads if all you're given is eye colour or has glasses, since they don't seem too workable otherwise. It's also a good place to put optician documentation so the game can decentralize an npc's shoebox of infinite knowledge.