Yes I had to do it. Especially since, there is a lack of really good brown eyes out there. Turned out pretty good if I do say so. I use Anva's sclera overlay and cleans up the edges nicely.
Enchantress did this for Warlokk's Voluptuous bodyshape in gold @ insimenator.org. And as cool as that is, I decided that my girls could use this in white cotton. Maybe yours can too.