Artificial tears are sterile, over-the-counter lubricating drops that add moisture to the eye’s surface to temporarily relieve dryness, burning, and irritation.
Dry, gritty eyes after a long afternoon at the screen have a simple first fix — a drop that mimics the tear film your eye already makes. Knowing what goes into that drop, and where it stops helping, decides whether it brings relief or just another bottle in the drawer. Whether you wear contacts, work under dry office air, or just get scratchy eyes in winter, the same handful of facts covers most of it.
What Do Artificial Tears Actually Do To Your Eye?
Artificial tears supplement the natural tear film, the thin layer of water, oil, and mucus that coats and protects the cornea. A healthy film keeps the surface smooth and cuts friction every time you blink.
When that film breaks down too fast — from wind, dry air, sun, reduced blinking at a screen, or plain fatigue — the exposed surface stings and feels gritty. Lubricating drops top the film back up and reduce that friction, which is why relief arrives within minutes.
What they do not do is treat the cause. If dryness stems from inflammation, eyelid disease, a medication, contact-lens problems, or another eye condition, drops mask the symptom without resolving it. That distinction matters more than any brand choice.
The Ingredients That Do The Work
Most artificial tears rely on one or two lubricating ingredients that thicken and hold moisture on the eye surface. Labels look technical, but the list is short and repeatable.
Carboxymethylcellulose sodium (CMC) and hypromellose are common viscosity builders — they make the drop cling longer. Polyvinyl alcohol and povidone are water-soluble lubricants that spread easily across the eye. Dextran often pairs with hypromellose to stabilize the film. None of these are drugs in the treating sense; they are lubricants that behave like the watery layer of your own tears.
The other half of the label is the preservative. Multidose bottles need one to stop bacteria from growing after the cap comes off. Frequent users sometimes find preservatives sting after several doses a day, which is where preservative-free single-use vials come in — more packaging, less irritation risk.
How To Use Them Without Wasting A Bottle
Technique matters more than most people expect, because a contaminated bottle can turn a harmless drop into an eye infection. The FDA’s consumer guidance covers the routine in four moves.
- Wash your hands with soap and water first.
- Keep the bottle tip away from your hands, eye, eyelashes, and clothing — never let it touch any surface.
- Instill the number of drops printed on that product’s label. Formulas differ, so the label wins over habit.
- Recap promptly and store the bottle as the package directs.
Two habits are worth making permanent: never share a bottle with another person, and check the expiration date before every use — contamination risk climbs once a product is past date. If you wear contacts, follow the label or your eye-care professional’s direction on removing lenses first and waiting before reinsertion, since there is no single universal interval.
Buy only products labeled for ophthalmic use and marked sterile. Redness-relief drops are a different category entirely, and mixing them up is one of the most common mistakes. For a side-by-side look at formulas that suit everyday dryness, this roundup of artificial tears for dry eyes lines up the practical options.
When To Stop Self-Treating And Call A Professional
Artificial tears are for temporary comfort, not for symptoms that persist or worsen. Eye pain, marked redness, discharge, light sensitivity, vision changes, or an injury all call for professional evaluation rather than another drop.
Recalls are the other reason to check before you buy. The FDA reported a nationwide recall on March 29, 2023, of all in-date lots of Global Pharma Healthcare Artificial Tears Lubricant Eye Drops, sold as EzriCare and Delsam Pharma, over possible contamination with drug-resistant Pseudomonas aeruginosa. The agency logged 55 adverse-event reports, including eye infections, permanent vision loss, and one bloodstream-infection death, and told consumers to stop using the product. The FDA later warned against purchasing or using EzriCare Artificial Tears at all.
That case set a durable habit: verify current FDA recall and safety-alert notices before using a product, especially one bought online or from an unfamiliar seller. Record the product name, active ingredients, bottle size, lot number, and expiration date exactly as printed on the package. The FDA’s guidance on eye drops lays out the full safety picture.
One last note on cost: prices swing widely by brand, size, and preservative-free format, so compare on the shelf rather than trusting an old figure.
Common Questions
Can I Use Lubricating Drops Every Day?
Yes, for many people — but read the label’s frequency instructions, since formulas differ. If you find yourself reaching for drops many times a day, or the relief keeps getting shorter, that pattern is worth raising with an eye-care professional. It can point to an underlying cause that drops alone won’t fix.
Do Artificial Tears Expire?
Yes, every ophthalmic product has an expiration date, and using an expired bottle raises contamination risk. Discard it once the date passes. Multidose bottles also carry guidance on how long to keep them after opening, so check the package rather than the purchase date.
Are Preservative-Free Vials Better?
Not universally. Preservatives protect multidose bottles from bacterial growth, and most occasional users do fine with them. Preservative-free single-use vials help people who dose frequently and notice stinging or irritation from preservatives. The trade-off is cost and packaging, not a difference in basic lubricating action.
Sources
- U.S. Food and Drug Administration. “What You Should Know About Eye Drops” Supports hand-washing, tip-contact, storage, expiration, and recall guidance.
- American Academy of Ophthalmology. “Lubricating Eye Drops” Supports how lubricating drops supplement the tear film and relieve dryness.