These are two part eyeballs made to go with https://www.printables.com/cs/model/584114-skull-bowl-widened.
They are meant to be printed as an outer in white and an inner in a color of your choice. You can easily paint the hollow inside black for the pupil.
No glue needed, printed at 20mm they should interference fit (recommend testing with your printer settings)
The outers come in four flavors:
eye_outer_scale (original): no flat on the white outer eye (all eyes pictured, works in skulls)
eye_outer_up: the back is flattened for printing without supports.
eye_outer_side: the bottom is flattened for straight out look.
eye_outer_angle: a slight angle so they "look" up from a flat surface.
NOTE: Recommend all eye_outer models be printed with heavy infill (80-90%) to counter the weight of the eyeball inner. Printing with 15-20% and the weight is in the inner piece, making them tend to point down. This is fine in a skull socket as they stay pretty well, but for display in a bowl or on a table heavier infill is recommended.
The user re-uploaded this model. The user is not the original author of the model.