The best over-the-counter option for dry eyes depends on what’s causing them, but for most people, artificial tears are the starting point. These lubricating eye drops come in several formulations, and the active ingredients matter more than the brand name on the box. Beyond drops, OTC ointments, eyelid cleansers, and warm compresses can all play a role, especially if basic artificial tears aren’t enough on their own.
How Artificial Tears Work
Artificial tears replace or supplement your natural tear film, which is a thin, layered coating that keeps the surface of your eye smooth, moist, and protected. When that film breaks down too quickly or isn’t produced in sufficient quantity, you get the gritty, burning, watery-eyed feeling of dry eye. OTC drops address this by adding moisture, thickening the tear layer, or slowing evaporation.
The active ingredients in artificial tears fall into a few main categories, and each works slightly differently. Understanding the differences helps you pick the right formula rather than grabbing whatever is on sale.
Types of Active Ingredients
Cellulose-Based Drops
Carboxymethylcellulose (CMC) is one of the most widely used ingredients in artificial tears. It’s a plant-derived polymer that sticks to the surface cells of your cornea, holding moisture in place longer than plain saline would. At a 0.5% concentration, it works as a basic lubricant (this is what’s in Refresh Tears). At 1.0%, as in Refresh Liquigel, it creates a thicker, gel-like consistency that stays on the eye longer, which is useful for moderate dryness. Hydroxypropyl methylcellulose (HPMC) is a related cellulose compound found in GenTeal products, often combined with dextran to boost viscosity.
Polyol-Based Drops
Polyethylene glycol 400 and propylene glycol are the backbone of Systane Ultra, one of the top-selling artificial tear brands. These ingredients are classified as demulcents, meaning they coat and protect irritated tissue. Glycerin and propylene glycol also act as humectants, actively pulling and retaining moisture at the eye’s surface. Blink Tears uses polyethylene glycol combined with hyaluronic acid, a naturally occurring molecule that can hold many times its weight in water, giving the drops a longer-lasting feel.
Lipid-Based Drops
If your dry eye is caused by tears that evaporate too quickly rather than tears that aren’t produced enough, lipid-based drops target the problem differently. Your tear film has an oily outer layer produced by tiny glands along your eyelid margins called meibomian glands. When those glands are clogged or underperforming (a condition called meibomian gland dysfunction), the oil layer thins out and tears evaporate faster than they should.
Lipid-containing drops aim to replenish that oil layer. Commercial formulations use mineral oil, castor oil, phospholipids, omega-3 fatty acids, or medium-chain triglycerides. Soothe brand drops, for example, combine glycerin and propylene glycol with a lipid component. If your eyes feel dry primarily in heated or air-conditioned rooms, or if you notice your eyelids look oily or crusty in the morning, evaporative dry eye is likely part of the picture, and lipid-based drops are worth trying.
Preservative-Free vs. Preserved Drops
Most multi-dose bottles of artificial tears contain preservatives to prevent bacterial growth after opening. The most common preservative, benzalkonium chloride, can irritate the corneal surface with frequent use. If you’re applying drops four or more times a day, switching to preservative-free single-use vials is a smart move. They cost more and create more packaging waste, but they eliminate the risk of cumulative preservative exposure to an already irritated eye.
Some brands now use “vanishing” preservatives like stabilized oxychloro complex (used in Blink Tears) that break down on contact with the eye. These are a reasonable middle ground if you want the convenience of a multi-dose bottle without traditional preservatives.
Nighttime Ointments for Severe Dryness
If you wake up with eyes that feel stuck shut, scratchy, or painfully dry, a nighttime ointment provides hours of protection that drops can’t match. These thick, petroleum-based formulas contain white petrolatum (typically 80%) and mineral oil (20%), forming a long-lasting barrier that prevents moisture loss while you sleep. You apply a small ribbon, about a quarter inch, inside your lower eyelid before bed.
The trade-off is blurred vision. Ointments coat the eye so thoroughly that you won’t be able to see clearly for a while after applying them, which is why they’re best reserved for bedtime. Soothe Night Time and Refresh PM are two common OTC options.
Eyelid Hygiene Products
Dry eye frequently coexists with blepharitis, a low-grade inflammation of the eyelid margins caused by bacteria and debris buildup. When your eyelids are inflamed, the meibomian glands can’t secrete oil properly, which destabilizes your tear film. Cleaning the eyelids directly addresses this root cause.
Hypochlorous acid sprays and wipes, available at 0.01% concentration, are one of the more effective OTC lid hygiene options. Hypochlorous acid is an oxidizing agent that kills bacteria by penetrating cell walls and disrupting their proteins. What makes it especially useful is its selectivity: studies show it reduces harmful bacteria like Staphylococcus species while largely preserving normal skin flora. In a clinical trial comparing hypochlorous acid wipes to hyaluronic acid wipes in blepharitis patients, the hypochlorous acid group showed significant improvement in tear film stability, tear volume, and symptom scores, while the hyaluronic acid group improved in fewer measures.
These products are sold under names like Avenova and OCuSOFT and are typically sprayed onto a cotton pad or directly onto closed eyelids once or twice daily.
Warm Compresses
A warm compress is one of the simplest and most effective tools for dry eye caused by clogged meibomian glands. The goal is to melt thickened oil (meibum) that’s blocking the gland openings so it can flow freely again. Healthy meibum melts at relatively low temperatures, but thickened, dysfunctional meibum requires higher heat to loosen.
Research points to a target temperature of 40°C (104°F) or higher, sustained for at least 10 minutes, applied once daily. A single session at the right temperature can measurably improve tear quality. Moist heat works better than dry heat because it transfers warmth more efficiently. Microwavable eye masks designed for this purpose hold their temperature more consistently than a wrung-out washcloth, which tends to cool down within a couple of minutes and needs constant reheating.
After warming, gently massaging the eyelids from top to bottom (upper lid) and bottom to top (lower lid) helps push the softened oil out of the glands. Pairing warm compresses with lid hygiene creates a daily routine that addresses both the bacterial and mechanical sides of meibomian gland dysfunction.
What to Avoid
Redness-relief drops are not dry eye treatment. Products containing vasoconstrictors like tetrahydrozoline or naphazoline work by squeezing blood vessels on the eye’s surface to temporarily reduce redness, but they do nothing for the underlying dryness. Worse, they create a rebound effect: when the drug wears off, blood vessels dilate wider than before, making redness worse than it was originally. Tolerance can develop after as few as 5 to 10 days of daily use. The FDA requires these products to carry a warning that overuse may produce increased redness, but many people miss it.
If your eyes are both red and dry, treat the dryness with lubricating drops. The redness will often improve on its own as the surface irritation resolves.
Choosing the Right Product
Start by identifying your primary symptom pattern. If your eyes feel dry throughout the day and improve with any moisture, a basic CMC or polyol-based artificial tear used a few times daily is a reasonable first step. If dryness is worst in the morning or in dry environments, consider lipid-based drops for daytime and an ointment at night. If your eyelids are red, crusty, or feel warm to the touch, add lid hygiene and warm compresses before spending more money on premium drops.
There’s no single best product for everyone. Dry eye has multiple causes that often overlap, and many people end up using a combination: a lubricating drop during the day, a warm compress in the evening, and an ointment at bedtime. If you’ve been using artificial tears consistently for a few weeks without meaningful relief, that’s a signal to look beyond the drops themselves and consider whether eyelid inflammation, your environment, or screen habits might be driving the problem.