https://www.skillshare.com/classes/Drawing-Realistic-Eyes-Step-By-Step/559718992?via=search-layout-grid

This tutorial will teach you how to draw a realistic eye by following four steps: Structure, sketching, blocking in and building detail.

You'll learn:

how to draw an eye that actually looks like the photo or person you are drawing

shading techniques for layering tonal values

how to get a realistic 3D effect

Materials you'll need:

Pencils in light and dark grades: Eg. 2H, 2B and 4BSketchbook or sketching paperEraser

This class is suitable for complete beginners or for people who want to improve their portrait drawing.