Start by drawing the outline of the actual eye and the pupil

Next fill in the eye details

Add the eye-lid and the surrounding skin

Add a few more dragon-like details

(Optional) Add colour to the eye (choose the colour dependent on what element the dragon is e.g. light blue for ice, darker blue for lightning, red/orange for fire, brown for rock or green for nature)

- A pencil
- A sharpener
- An eraser