GlassOuse: Assistive Device
From: Westminster Technologies, Inc.

GlassOuse is a Bluetooth headmouse that provides effortless access to
computers, tablets, and smartphones. This new lightweight, wide angle
headmouse has revolutionized the way people with differing abilities access
computers and other personal devices.

Simply wear the GlassOuse as you would a pair of glasses. Already wear
glasses? No problem! GlassOuse fits right above your glasses. Open the
Bluetooth connection settings on your computer, tablet, Smart TV, or
smartphone. Turn on the GlassOuse glasses and choose the Bluetooth
connection. Complete the initial calibration of the device and start using.
That's all there is to it.

Additional sensitivity settings are available to adjust the mouse speed
either through GlassOuse or your computer's mouse settings. Use small head
movements to move the mouse, then use the bite click by either pressing the
lips together or biting the switch to make your mouse clicks. The bite click
cover is flexible, sturdy, non-toxic, and easily cleaned. GlassOuse comes
with two silicone bite click covers but additional covers may be purchased.

Source:
https://www.westminstertech.com/assistive-technology-products/glassouse