Make invisible the compass's edges by choosing the following options: Layer Mask and Gradient Tool. Change the layer's type on Hard Light.



Change also the color of the eye's layer (Selective Color).



Then change the color of the eye itself. For this operation we need to paint firstly the eye, using the Brush Tool with smooth edges, and then blur out a little the layer, selecting the next command: Filter ? Blur ? Gaussian Blur. Finally change the layer's type on Multiply.



Merge down all the layers: Layer ? Merge Visible (shift+ctrl+e) and make a copy of that new layer (сtrl+j). Blur it out a little (Gaussian Blur).



Minimize the intensity of this layer's colors, using the command from here: Image ? Adjustments ? Hue/Saturation (ctrl+u).



Change the layer's type on Darken: