After effects -changing eye iris color -technical

This video is from MTS films,some times actors eye need to be focused and director wants a color correction-like little brightening or adding color to the eris or make eye more focus -then that can ve only done with After effects  see how much difficult for one shot

Related terms: Red Iris Eye Color, Iris Colors Eye Chart, Black Iris Eye, Causes of Iris Color Change, Iris Function in the Eye, Eye Iris Disorders, The Iris Effect 2005, Iris Effect Film