I'm really impressed with this (now that it has loaded).
I do have a qualm, hopefully taken as constructive criticism and not nit-picking:
The cornea and the aqueous humor are going to have different IORs and because this doesn't appear to be modeled, the iris is unrealistically distorted at sharp angles.
Otherwise, this is amazingly, disturbingly realistic. Good job.
To me seeing "requires WebGL" indicates that some sort of check has been carried out and the current browser has failed. Not really good as a loading message, IMO...
It basically requires the Web GL plugin (which is not a part of standards). Some newer versions of _some_ browsers seem to have it built in. This is called "Open Web".
Why doesn't GPU hardware do native path tracing now? People (well at least 1 person) is/are using general purpose GPUs to do path tracing at almost real time. If they created GPUs with cores specifically for path tracing then we could have real time path tracing as soon as that was engineered. Whoever made this brigade 3 thing, I wish nvidia or ATI would hire him. http://www.youtube.com/watch?v=abqAanC2NZs