Thanks for your tips, advice and preview render!  Regrettably there's only a "EyeSocket" material for the "inside of the lids" for David. :( The texture I'm using has an "EyeSocket" texture applied to it already -- however, by darkening the diffuse color to grey it seems to help. I may decide to make the grey a little more pinkish. I wish there was a way to make it a little more slightly wet though.

--R.