Geometry

These are the settings that deal with the stylized eye's mesh 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 Squish - Creates a squished, oval shape of the iris
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
Star Points - Number of points in the star (for "Star" pupil shape)
Pupil Shape - Adjust the shape of the pupil
Pupil Shape 2 - Additional input for the pupil shape (for "Heart" pupil shape)
Pupil Width - Adjust the width of the pupil
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

Morph Pupil Shape:

Settings for morphing the shape of the pupil into another shape:

Morph Pupil Shapes - Morph between two pupil shapes
Morph Pupil Type - The shape of the pupil to morph to
Morph Factor - Factor to blend between the two shapes of the pupil
Morph Pupil Size - Size of the secondary pupil shape
Morph Pupil Rotate - Rotates the secondary pupil shape
Morph Pupil Shape - Adjust the shape of the secondary pupil
Morph Pupil Shape 2 - Additional input for the secondary pupil shape (for "Heart" pupil shape)
Morph Pupil Width - Adjust the width of the secondary pupil shape

The different stylized eye pupil shapes and their topology (other than the default circular pupil shape):

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

Eye Squish

Settings for squishing the eye geometry to create a flatter front of the eye:

Squish Factor - Amount of eye squish
Squish Rotate 1 - Adjust the first axis of the eye squish direction
Squish Rotate 2 - Adjust the second axis of the eye squish direction

Look

Settings for the eye orientation:

Default Orientation

Settings for the eye 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

Difference between a rectangular and polar UV maps:

Transform UV

These settings transform the eye/cornea UV maps. The transformed maps can be viewed in the UV Editor.

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: