You want to be on the ‘Surfaces’ tab. Select the figure, and you should see a list of all the surfaces (also called material zones) for that figure in the Surfaces tab. You should see the various surfaces that make up the eyes near the bottom of the list.
Note that the surfaces for the eyes apply to BOTH eyes. If you want only one eye to have the cybernetic appearance, you’ll need to use the polygon group editor to select that eye and make it into its own surfaces so you can apply settings individually.
As to best place to find documentation/tutorials on this, I’m not really sure. You could try doing some searches on YouTube.