What you’ll need
H drawing pencil
Lightly draw a tilted oval shape with the H pencil.
Lightly erase over it to lighten it.
Trace the shape ONCE, not sketching.
To the left, mimmick the back curve.
Draw a small bubble or two for a reflection.
Add a long triangle as above...
and make the front into a curve, as above.
Gradate the left part of the eye with your colored pencil.
Start by pressing hard, then slowly get lighter.
Finally, trace the outline of the eye with the marker...
and erase the old pencil marks.