Brand name: Visine AC, Altazine Irritation Relief
Tetrahydrozoline is a medicine for short-term relief of discomfort, burning, and redness due to minor irritation of the eye. It may also be used by your physician to treat certain other conditions.
It refers to the eye astringent and decongestant combination. It coats the eye, narrows the eye blood vessels, thus relieving, dryness, and redness.