Yes, that is indeed the Triforce painted onto his prosthetic eye. Because of its positioning, you wouldn't be able to tell by just looking at him, as it's completely hidden:
But lo and behold, there it is.
So for everyone that gets a tattoo of their favorite video game logos or names their children after a character they're fond of, ManiacalZManiac just upped the ante and added a brand new challenger in the fight of Most Dedicated Fan Ever.
Just for the fun of it, let's say you were in this position. What would you get painted on your prosthesis? The James Bond gun barrel? The Batman symbol? A green 1-up mushroom?
