It was an enjoyable episode. We have some better idea of what the island is (the devil's prison?), but the big thing that came out is that apparently guyliner is the source of immortality:
So, at this point in the story and earlier, Richard/Ricardo has little to no cosmetic enhancements to his eyeline:
But later he returns to his eye-shaping ways:
I pulled this interesting nugget from Nestor Carbonell's (the actor who plays Richard) IMDb page: Carbonell revealed on the "Lost" (2004) fifth season DVD extras that not only does he not wear eyeliner, mascara, or makeup of any kind to make his lashes and eyeline appear as dark as they do, but the makeup artists for "Lost" actually use concealer on his lashes and under his eyes to try to tone down the natural darkness of his eyeline. He also said that the unusual appearance of his eyes caused him to get teased and bullied when he was a child.
I smell BS, but hey, whatever floats your boat buddy.