Macro Pupil Constriction in Slow Motion

Next time you have to do a detailed pupil dialation, be sure to check this video out.  Very great reference for how the pupil moves and the fibrerous construction of the iris itself.  And much better than watching those LASIC videos.
 Most people are familiar with the general structure of the eye ball, and how it all works, but I don't know how much study has been done, or recorded of the actual iris itself. 
 Makes you wonder if a hair render solution might give you the best results, or just a few overlapping stretching textures. ( also gives you something to think about the next time you go to the eye doctor )