#881: Tearsdropped

Applying eyedrops to an uncooperative child or a pet is often a difficult job. The drops often end up outside the eye. This medication can be expensive and sometimes it’s critical to use exactly the correct number of drops.

Today’s invention is a new ‘dropper’ device. A clear plastic tube can be applied firmly to the orbit of an eye (via a rubber eyepiece). The other end is attached to an inhaler device, delivering eye medication in aerosol form.


A small mirror is placed inside the clear tube, behind the aerosol delivery nozzle. This allows software, running on a digital camera, easily to detect when the eye has blinked closed. At this point, the inhaler release button is activated electronically, for a few milliseconds, and a precise amount of medication sprayed into the opening eye.

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