Blending Options-Gradient Overlay

Create Futuristic EyeBall in Photoshop CS

Gradient's parameters:

Create Futuristic EyeBall in Photoshop CS

Make a copy of the new made layer and press the Alt button to erase the lowest part of the ring, applying the following instrument
too. Be attentive with the parameters indicated below:

Create Futuristic EyeBall in Photoshop CS

Create Futuristic EyeBall in Photoshop CS

Blending Options-Gradient Overlay

Create Futuristic EyeBall in Photoshop CS