I have done colour correction and contrast correction and the picture is the right colours and texture. The eye of the cat is all wrong now. the is a vivid green in life but now is a washed out drab eye. Need to correct that one thing. Can I do it??
Sure. Select the eye, add a one or two pixel feather, then layer>new adjustment layer>hue/saturation. If the eye is completely blown out (no color at all) you may need to turn on the colorize checkbox. Once you're done you may want to adjust the opacity of the layer a bit for a more realistic effect.