Dust, ozone, UV light rays, wind, dry heat (e.g air conditioning), drafts, cosmetics, smoky atmospheres, TV or computer work can lead to dry-feeling eyes. Systane Lubricating Eye Drops can help to keep eyes looking and feeling great, providing immediate comfort and lasting relief.Systane single dose vials are the perfect way to treat dry-feeling eyes on the go. Handy and preservative-free, the vials can be popped discreetly in a pocket or handbag - perfect when you're out and about, in the car or in the office, or easy to slip into your gym bag for use after a work out. Fuss-free and versatile, the vials are discarded after just one use to minimise waste.Systane Lubricating eye drops may be used as needed throughout the day. Twist off the top of the single dose vial. Place drops on the eye and blink. Discard the vial after use.