This photograph shows an eye that has suffered a retinal detachment treated with silicone oil. The oil is placed in the back of the eye, but has expanded into the front anterior chamber. You can see it as a clear round bubble in the eye. It looks like a contact lens, but is actually a clear bubble of fluid sitting in the eye.

This image may be hard to interpret, so you may want to watch our silicone video (from which this snapshot was taken) to get a better idea how this looks.