The document provides instructions for selectively coloring the eyes in a black and white photo using layers and masks in Photoshop. The steps are: 1) Duplicate the photo layer twice; 2) Apply high pass filters to layers to sharpen details; 3) Desaturate the top layer and change its blend mode; 4) Repeat for another layer; 5) Add a curves adjustment layer and paint with white on the mask to color the eyes; 6) Invert the mask selection and desaturate to remove color from the rest of the photo. Fine-tuning of the eye color is done by adjusting the curves layer.

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