There’s no single best over-the-counter eye drop for dry eyes because the right choice depends on what’s causing your dryness. But for most people starting out, a preservative-free artificial tear containing hyaluronic acid (sodium hyaluronate) or carboxymethylcellulose is the strongest general recommendation. These ingredients have the most evidence behind them, and preservative-free formulas are safer for regular use.
The real key is matching your drops to your type of dry eye. Here’s how to do that.
Two Types of Dry Eye, Two Types of Drops
Dry eye falls into two broad categories: your eyes either don’t produce enough tears, or your tears evaporate too quickly. Many people have a mix of both, but understanding the difference helps you pick the right product.
If your eyes feel dry throughout the day, especially during screen time or in air-conditioned rooms, you likely need a water-based lubricant (called a demulcent). These drops add moisture directly to the eye surface. If your eyes feel worse in the morning, your lids feel sticky, or your tears seem to disappear fast, the oily outer layer of your tear film may be too thin. In that case, a lipid-based drop that seals in existing moisture is a better fit.
Water-Based Drops for General Dryness
Most artificial tears on the shelf are water-based. They contain ingredients that either thicken the tear layer so it stays on your eye longer, or pull and hold water against the eye surface. The FDA classifies these as demulcents, and the main active ingredients you’ll see are:
- Carboxymethylcellulose (CMC): The most widely used thickening agent in U.S. artificial tears. It binds directly to the cells on your eye’s surface, increasing how long the drop stays in contact before draining away. Concentrations range from 0.2% to 2.5%, with higher percentages providing longer-lasting relief but slightly blurrier vision for a moment after application.
- Propylene glycol: Forms a protective coating over the eye surface to reduce irritation. It also acts as a humectant, holding up to three times its own weight in water. You’ll find it at 0.2% to 1%, often combined with glycerin.
- Glycerin: Both lubricates and draws water to the eye surface. It has an additional benefit that other ingredients lack: it promotes the growth of surface cells and protects against the damage that overly concentrated (high-osmolarity) tears can cause. This matters because dry eye tears tend to become saltier than normal, which irritates the surface further.
- Polyethylene glycol 400: Another common humectant found at 0.2% to 1%, frequently paired with propylene glycol in popular brands.
Any of these will provide relief for mild to moderate dryness. If you’re unsure where to start, a CMC-based drop or a propylene glycol/glycerin combination is a safe first choice.
Hyaluronic Acid: The Standout Ingredient
Sodium hyaluronate (the salt form of hyaluronic acid) has become increasingly popular in eye drops, and the evidence supports the hype. A systematic review of 18 clinical trials found that hyaluronic acid drops outperformed other artificial tears in the majority of comparisons, improving both how patients’ eyes felt and how their eye surfaces looked under examination.
What makes it effective is a combination of properties. Hyaluronic acid can hold up to 1,000 times its own weight in water, which keeps the eye surface wet far longer than most other ingredients. It also reduces friction between your eyelid and cornea during blinking, has mild anti-inflammatory effects, and helps stabilize the protective barrier on the eye’s surface. Effective concentrations start at 0.1%, with most products ranging up to 0.4%.
Hyaluronic acid drops tend to cost a bit more than basic artificial tears, but if standard drops aren’t giving you enough relief, they’re worth trying before moving to anything more involved.
Lipid-Based Drops for Fast-Evaporating Tears
Your tear film has three layers: a watery middle layer, a mucus layer underneath, and a thin oily layer on top that prevents evaporation. If the oil-producing glands in your eyelids (meibomian glands) aren’t working well, tears evaporate too quickly no matter how much water-based lubricant you add.
Lipid-based drops address this by thickening or replacing that outer oily layer. They typically contain mineral oil, castor oil, or phospholipids. These ingredients don’t add moisture directly. Instead, they seal in the moisture already there and slow down evaporation. Look for products labeled as “lipid-based” or that list mineral oil or castor oil as active ingredients.
If you’ve been using regular artificial tears multiple times a day and still feel dry within 30 minutes of applying them, an evaporative problem is likely, and switching to a lipid-containing formula can make a noticeable difference.
Why Preservative-Free Matters
Many bottled eye drops contain preservatives, most commonly benzalkonium chloride, to prevent bacterial growth after opening. This preservative is effective at keeping drops sterile, but it’s also toxic to the cells on your eye’s surface over time.
If you use artificial tears once or twice a day on an occasional basis, preserved drops are generally fine. But if you’re using drops regularly, multiple times daily, or plan to use them long-term, preservative-free formulas are the better choice. They come in single-use vials or in newer multi-dose bottles with built-in filters that keep bacteria out without chemicals.
People who already have moderate to severe dry eye, wear contact lenses, or use other medicated eye drops (like glaucoma medications) should default to preservative-free. The cumulative preservative exposure from multiple products adds up and can worsen the very dryness you’re trying to treat.
Drops to Avoid for Dry Eyes
Redness-relieving drops are not dry eye drops, and using them for dryness can backfire. Products marketed to “get the red out” contain decongestants that shrink blood vessels on the eye’s surface. When the effect wears off, blood vessels dilate even more than before, creating rebound redness that worsens over time. The American Academy of Ophthalmology recommends not using decongestant eye drops for more than 72 hours. If your redness is caused by dryness, lubricating drops will address the root cause without the rebound cycle.
Safety and Product Quality
Not all eye drops are manufactured to the same standards. In 2023, the FDA flagged several products from a single contract manufacturer, Velocity Pharma, after investigators found unsanitary conditions and bacterial contamination at the production facility. Multiple store-brand products were recalled, including eye drops sold under the Leader brand name. Earlier that year, EzriCare Artificial Tears were also pulled from the market due to contamination concerns.
To protect yourself, stick with well-known national brands or their preservative-free versions. Check the FDA’s recall page if you’re buying a store brand you haven’t used before. And never use drops that appear cloudy, have floating particles, or have a broken seal.
Picking the Right Drop for You
Start by identifying your pattern. Eyes that feel gritty, tired, or dry during the day respond well to a standard water-based lubricant with CMC, glycerin, or hyaluronic acid. Eyes that feel worse in the morning or seem to dry out within minutes of blinking point toward a lipid-based formula. If you’re not sure, a hyaluronic acid drop in preservative-free single-use vials is the most versatile starting point.
Give any new drop at least two to three weeks of consistent use before deciding it isn’t working. Dry eye is a chronic condition for most people, and the surface of your eye needs time to recover. If you’ve tried two or three different types of OTC drops without improvement, that’s a reasonable point to see an eye care provider, who can measure your tear production and check whether your oil glands are functioning properly.