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This 2004 paper got a lot of attention in the computer vision community doing essentially the same thing about a decade ago:

http://www.cs.columbia.edu/CAVE/projects/world_eye/

"The World in an Eye," K. Nishino and S.K. Nayar, IEEE Conference on Computer Vision and Pattern Recognition (CVPR), Vol.I, pp.444-451, Jun, 2004.

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There was a related paper on using the eyes as a means of capturing a full environment map which could be used directly for relighting a scene (e.g., for 3d rendered scenes or for compositing digital objects into scenes):

http://www.cs.columbia.edu/CAVE/projects/eyes_relight/

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