I read a rumour online that stated you could see through Darth Vader's mask eye-lenses at the end of the movie, during the Death Star trench scene, and see David Prowse's eyes(Darth Vader's 'body' actor in Eps I -> III). I had some free time today and slow-mo'ed through my Special Edition DVD with these parts with Darth Vader and confirmed this (see pic 1). More interestingly, and I think I'm the first to see this, it seems like digital artists have composited Hayden Christian's "yellow" eye onto a shot (see pic 2). This is weird because you can see both David Prowse's eye AND Hayden Christian's "yellowed" eye super-imposed above it. It happens at 01:50:32 on my UK, Region 2 DVD. I used VLC to alter "Adjust and effects" to find these. For my monitor, hue is set to lowest, Contrast is set full, brightness is set to ~80%, saturation 50% and gamma 10%.
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not sure what you mean by hayden's yellowed eye, though. i'm not really up on this stuff, but the only thing i'm aware of is hayden replacing the older gentleman playing vader in epVI, the celebration scene on endor. you know, when the three jedi spirits are looking on beningly.
http://2.bp.blogspot.com/-lZbo4-sLH74/UUCT3MiGHZI/AAAAAAAADIU/UluaS3GVJHc/s1600/
evil-anakin1.jpg
If you full-screen picture #2, you can see this "evil" eye has been superimposed on top of David Prowse's. I'm not sure why because his eye is still clearly visible, but is just not at the centre of the mask's "eye" lenses.
but given the enormous hordes of SW fans across the net, i would think your theory could find some fellow reasoners, certainly...
well, maybe you could submit this to the site sometime via "add a post." just a thought. actually i should do the same since i have a longish one on star trek TOS / TNG that i never quite finished. ahem.