[elefont2]

While it looks impressive, i don't think 'raytraced' is the correct term - i suspect it is just rendered

[corysama]

"Ray traced" probably refers specifically to the shader in the lens running a tiny ray tracer to optically distort the view of the iris.

[mistercow]

That appears to be correct if you look here: http://www.vill.ee/entry.php?17-GLSL-shading-in-WebGL

>Texture raytracing to simulate cornea refractions

[alceufc]

Maybe it is really ray-traced. Notice that the simulation allows you to control camera focus and aperture.