Video Copilot Glass Eyes is a free After Effects plug-in from Video Copilot, the team behind Optical Flares, Element 3D and Saber. It adds glass eyes to footage and requires both Element 3D and After Effects.
Getting started follows a simple routine: apply the effect to a blank solid, then motion track the eye position, and use an inner shadow layer style to give the eyes depth. Controls include custom pupils, pupil size control, pupil color, googly speed and amount, and highlight rotation.
The plug-in suits a range of playful jobs, from creating creepy videos and adding personality to fixing wedding footage and reworking favourite movie scenes. It is listed here as free and available to download, and was last updated in September 2020.