How to draw eyes

First, start with a rough outline

Add eye ball and start to clean up the lines a bit

Add some lines around the eye to make it more realistic.

Add shading above and below the eye by smudging with your finger. Also, add some shading inside the eye near the corner

Add eyelashes and the eyebrow.

Here is one i did earlier. I added depth by using charcoal and smudging.

Hope you enjoyed! Remember to comment :)