Here's one approach.
First use the Clone tool to get rid of the light hair and fleck of dust on the green background.
Duplicate your background layer so you are working on a copy above the original.
With that copy selected in the layers palette, use Filter > Noise > Dust & Scratches... In the dust and scratches dialog, set the Radius to about 4 pixels and click OK.
Now back in the layers palette change the blending mode to Darken and drop the opacity to 55% or until you see the highlights in the eyes come back enough but not the other little light pixels.
You may wish to paint in a tiny highlight in the shadowed eye and keep the opacity of the layer on which you've run the filter a little higher, maybe 60 - 65%
A similar approach might be to use Filter > Noise > Despeckle. Experiment to see what looks good for you.