Ladies and gents, hie thee to Amacci where you will find (in both the eyes section and on the big freebie wall in the hair section) two pairs of grey/brown eyes set out for free: one pair with a normal sclera (the white of the eye) and one with a completely black sclera.

You’ll land at the landing point (the store is pretty busy, so fly before you take the teleport; that way you can rise up and away from anyone idling at the landing point, instead of flailing!) then head east (following the crowd!) and go into the hair section. Just past the first wall on your right is the freebie wall, and you’ll find the eyes there. Here’s a direct link that should place a red arrow on your screen to the freebie wall.