I'm sure what happened was this fish was sold as a scribbled rabbitfish. The problem is common names (as opposed to latin names) are very loosely used and things just show up on lists and sometimes mixups occur. It's entirely possible that scribbled rabbit fish is a common name for this species too, it's just that it's more often used to describe S. doliatus (also called "bluelined rabbit" or "penciled rabbit" .. but then guess what, "bluelined rabbit" may also refer to S. virgatus or S. puellus ... etc. etc.) The basic gyst of my blathering here is that common names are more of a gong show.
I prefer latin id's when possible but I guess that just means my geek is showing.
Anyhow, rabbitfish have very large eye lenses. That film you see is just how they are. I don't think I've ever seen a perfectly clear lens on a rabbitfish, I think it's just the way light refracts through them. It's not pop eye or cloudy eye at all - it will have a much milkier look to it if that were the case.