Punctum plug consists of a distal tip, a proximal cap and a body connecting the tip to the cap. The cap has a proximal surface, which remains exposed in the eye upon implantation of the punctum plug. A passage for an insertion tool extends distally in the punctum plug from an opening along the proximal surface. One recess in the proximal surface collect tear fluid by surface tension, and each recess is laterally offset in its entirety from the opening and does not overlap or align with the opening. The number of recesses is indicative of the size of the punctum plug.

Pupil dilators are used to reduce inflammation and pain in front of the eye. There are several pupil dilators also available. These are made of different materials such as silicone, hydrogel, or polymethylmethacrylate (PMMA).

Pupillometer (Pupilometer) is a hand-held portable electronic instrument that rapidly and simultaneously assesses, records and stores pupil size and reactivity to stimulus. It provides a rapid diagnostic aid for patients with suspected brain injury. It measures pupil reaction, speed and size in patients with suspected brain injury.