Geometry

Settings for the eye geometry:

Iris

Settings for the iris geometry:

Iris Size - The size (radius) of the iris
Iris Cup - Creates a concave shape of the iris
Iris Distort Factor - Distort the iris shape
Iris Distort Scale - Scale for the iris distortion noise
Iris Distort Seed - Iris distortion variations
Smooth Iris Border - Smooth the geometry at the boundary of the iris

Pupil

Settings for the pupil geometry:

Pupil Type - Sets the shape of the pupil, picked from a set of predefined shapes
Pupil Size - Changes the size of the pupil
Pupil Rotate - Rotates the pupil
Pupil Shape - Adjust the shape of the pupil
Pupil Width - Adjust the width of the pupil
Pupil Distort Factor - Distort the pupil shape
Pupil Distort Scale - Scale for the pupil distortion noise
Pupil Distort Seed - Pupil distortion variations
Smooth Pupil Border - Smooth the geometry at the boundary of the pupil
Topology Rotation Snap - Snap the rotation of the pupil to angles that align with the rest of the geometry of the eye

Cornea

Settings for the eye cornea geometry (transparent outer layer):

Hide Cornea - Hides the outer transparent layer geometry. Useful when trying to adjust the inner sclera/iris geometry.
Cornea Bulge - Bulge the cornea (front) of the transparent outer layer

Look

Settings for the eye orientation:

Default Orientation

Front Direction - Sets the "Front" direction of the eye. This is the direction the eye "looks at" by default, excluding any "Look Target" directions.
Up Direction - Sets the main "Up" direction for the eye

Look Direction

Settings for directing the eye look, using a custom target object:

Enable Look Target - Enable the look target features
Target Object - Object to use as the target for the eye look
Look Target Type - Sets the look target type. "Direction" uses the global position of the target object as the direction vector for the eye look. This direction stays constant as the eye itself is moved. "Location" uses the relative position of the target object, so the eye is always "looking at" the target when either is moved.

Shading

Settings for the materials and UV maps:

Materials

Eye Material - Material for the inner eye layer
Cornea Material - Material for the outer transparent layer

UV Maps

View UV - Controls which UV map is previewed in the UV editor
Eye UV - Sets the type of the eye UV map
Cornea UV - Sets the type of the outer transparent layer UV map

Transform UV

Settings for transforming the UV maps:

Iris Factor - Sets the proportion of the iris region of the UV map
Pupil Factor - Sets the proportion of the pupil region of the UV map
Eye UV Translate - Translates (move) the eye UV map in X and Y
Eye UV Scale - Scales the eye UV map
Eye UV Rotate - Rotates the eye UV map
Eye UV Pinch - Focuses the eye UV map towards or away from the pupil
Cornea UV Translate - Translates (move) the cornea UV map in X and Y
Cornea UV Scale - Scales the cornea UV map
Cornea UV Rotate - Rotates the cornea UV map
Cornea UV Pinch - Focuses the cornea UV map towards or away from the front of the eye

Settings

Settings for the eye geometry: