Lightly sketch the basic eye shape
Mark the upper and lower eyelids
Place the iris inside the eye
Draw the pupil in the center of the iris
Add the inner and outer corners of the eye
Refine the eyelid curves and thickness
Sketch the eyelashes with varied lengths and directions
Add the crease above the upper eyelid
Shade the pupil darkly
Shade the iris with radial strokes
Leave a small highlight in the iris
Darken the upper part of the iris slightly
Add shadows under the upper eyelid
Shade the whites of the eye lightly
Blend the shading smoothly
Add subtle veins if needed
Define the tear duct
Add skin folds and surrounding shadows
Adjust contrast for realism
Erase construction lines
Sharpen key edges and details