Over-the-counter eye drops for dry eyes
Over-the-counter eye drops for dry eyes are the most widely used self-care option for a condition that causes burning, grittiness, and visual discomfort. The market spans dozens of formulations, active ingredients, and delivery systems, and understanding the differences between them is essential for informed use. This guide draws on current product labeling data, peer-reviewed clinical research, and regulatory frameworks to explain what these products contain, how they function, and when professional consultation becomes necessary.
How Artificial Tears Work: The Tear Film and Its Three Layers
Dry eye syndrome is fundamentally a disorder of the tear film, which consists of three interconnected layers: an outer lipid layer that limits evaporation, an aqueous middle layer providing hydration and nutrients, and an inner mucin layer that anchors tears to the corneal surface. 11 OTC lubricating drops are formulated to supplement one or more of these layers when natural tear production is insufficient or when tear composition is abnormal. A 2025 study published in the Journal of Ocular Pharmacology and Therapeutics analyzed ten widely used eye drops for dry eye syndrome and identified three distinct rheological categories: those with significant shear-thinning behavior, those with moderate shear-thinning behavior, and those with Newtonian behavior, noting that some drops change their rheological profile when mixed with simulated tear fluid. 1 This categorization is clinically relevant because drops with shear-thinning properties spread more efficiently across the ocular surface during blinking.
The National Eye Institute confirms that artificial tears address dry eye symptoms by supplementing the natural tear film. 11 Most OTC formulations provide temporary relief rather than addressing the underlying etiology of tear deficiency or excess evaporation. When symptoms are persistent or severe, guidance from major ophthalmic organizations consistently recommends professional evaluation rather than indefinite reliance on self-selected OTC products. 2
Primary Active Ingredient Categories in OTC Dry Eye Drops
The active ingredient in an OTC artificial tear determines its mechanism of lubrication, viscosity, and duration of effect. Carboxymethylcellulose (CMC), also labeled as carmellose sodium, is one of the most common lubricating agents; it functions as a tear substitute and is suitable for the alleviation of mild to moderate dry eye syndrome symptoms. 3 Hydroxypropyl methylcellulose (HPMC) at concentrations such as 0.3% w/v is another widely used polymer, sometimes combined with glycerin at 0.2% w/v and dextran 70 at 0.1% w/v to provide layered hydration effects. 12 Glycerin at higher concentrations, such as 0.9%, also serves as a primary lubricant in certain multi-ingredient formulas that additionally incorporate sodium hyaluronate and specialty compounds like trehalose or sacha inchi seed oil. 9
Hyaluronic acid (HA), marketed as sodium hyaluronate, has become increasingly prominent due to its highly hydrophilic properties and biophysical similarity to natural tears. Formulations at 0.3% concentration have been rigorously evaluated; a 2026 randomized multicenter noninferiority trial published in Ophthalmology and Therapy found that a low-viscosity 0.3% HA solution demonstrated comparable therapeutic benefits to a standard comparator 0.3% HA formulation, while also producing significantly less blurred vision immediately after instillation at all assessed time points. 13 Lipid-based or oil-in-water emulsion formulations represent a distinct category; Retaine MGD, for example, uses light mineral oil at 0.5% and mineral oil at 0.5% in an emulsion designed to replenish the lipid layer and reduce tear evaporation. 4 Propylene glycol at concentrations such as 0.6% w/v is another active ingredient found in formulations targeting tear film stability. 14
Preservative-Free vs. Preserved Formulations: A Critical Distinction
The preservative status of an OTC eye drop is one of the most consequential variables for frequent users. Preserved formulations typically use agents such as benzalkonium chloride (BAK) or oxychloro complex to maintain sterility in multi-dose bottles. However, research has demonstrated that BAK-preserved prostaglandin analogs cause measurable damage to human ocular epithelial cells, raising parallel concerns about chronic preservative exposure in dry eye patients who may apply drops multiple times daily. 5 The Cleveland Clinic and the FDA both note that preservative-free formulations are preferred for individuals who require drops more frequently throughout the day. 6 7
Preservative-free multi-dose bottle technology has advanced considerably, with several brands now incorporating specialized dispensing systems to maintain sterility without chemical preservatives. For example, one multi-dose preservative-free bottle format uses a double lockout system to keep drops sterile across repeated uses while avoiding preservative exposure entirely. 8 Another format uses a patented pump-style delivery system that can yield approximately 300 individual doses from a single bottle, remaining usable for up to six months after opening. 15 Single-use unit-dose vials, available in formats such as 0.4 mL per vial in boxes of 30, eliminate sterility concerns altogether by delivering a fixed quantity of solution per application session. 4
Formulation Types: Liquids, Lipid Emulsions, and Gels
OTC dry eye drops are available across a spectrum of viscosities and compositions, each suited to different symptom profiles and usage patterns. Standard aqueous drops with low viscosity are well-suited for daytime use, providing rapid lubrication with minimal blurring. Higher-viscosity gel drops offer extended contact time on the ocular surface and are generally better suited for nighttime application because temporary blurred vision is more acceptable during sleep. 16 Lipid emulsion drops address the evaporative subtype of dry eye, which is associated with meibomian gland dysfunction (MGD). Refresh Optive MEGA-3, formulated with flaxseed oil and castor oil using nano-emulsion technology, targets all three tear film layers and is marketed specifically for MGD-related dry eye, with the stated benefit of not requiring shaking before use, unlike some other oil-based formulations. 17
A 2025 prospective, double-masked, randomized controlled trial published in Clinical Ophthalmology compared Systane Complete Multi-Dose Preservative Free (MDPF) eye drops against a castor oil-based comparator in 70 participants. After two weeks of use, the Systane group showed a significantly greater reduction in global SANDE dry eye symptom scores (-9.9 versus -4.13; p = 0.05) and a significantly greater reduction in total corneal and conjunctival staining scores (-2.8 versus -0.9; p less than 0.001). 18 The authors concluded that drops sharing the same active ingredient but using different excipients can produce meaningfully different clinical outcomes, underscoring the importance of formulation details beyond the primary lubricant.
Contact Lens Compatibility and Special-Use Considerations
Contact lens wearers represent a distinct user group with specific compatibility requirements. Many OTC eye drops contain ingredients or preservatives that can be absorbed by soft contact lens material, altering lens parameters or causing ocular irritation. The American Optometric Association advises that contact lens wearers should confirm that any OTC eye drop is specifically labeled as compatible with their lens type before use. 19 Products such as glycerin-based drops with sodium hyaluronate are formulated to coat and rehydrate the ocular surface while maintaining compatibility for post-surgical patients recovering from procedures like LASIK, as well as for those experiencing computer vision syndrome-related dryness. 20
The FDA requires that product labeling for OTC ophthalmic drops include instructions regarding contact lens use, such as whether lenses should be removed prior to instillation and how long to wait before reinsertion. 7 A separate category of OTC eye drops formulated to relieve redness should be distinguished clearly from artificial tears; vasoconstrictor-containing redness-relief drops do not address dry eye mechanisms and may worsen dryness with repeated use. Consumers should review active ingredient listings carefully to avoid conflating these categories.
Limitations, Risk Factors, and When to Seek Professional Evaluation
OTC dry eye drops provide symptomatic relief but do not treat the underlying etiology of tear deficiency or gland dysfunction. FDA labeling standards require that users stop using a product and consult a physician if the condition worsens or persists for more than 72 hours, if eye pain develops, if changes in vision occur, or if continued redness or irritation is present. 4 The American Academy of Ophthalmology notes that when OTC artificial tears prove insufficient to manage symptoms adequately, clinicians may evaluate prescription options such as cyclosporine ophthalmic emulsion or lifitegrast, which address inflammatory components of chronic dry eye disease. 2
Proper storage and handling remain important regardless of formulation type. Most OTC drops should be stored between 15 and 30 degrees Celsius (59 to 86 degrees Fahrenheit), and single-use vials must be discarded after opening to prevent contamination. 4 Multi-dose bottles typically carry recommended discard timelines of 30 to 90 days after opening depending on the specific formulation, and users should avoid touching the dropper tip to any surface or to the eye itself. The Mayo Clinic notes that warm compresses applied to closed eyelids are frequently recommended alongside OTC lubricating drops as a complementary strategy, particularly when meibomian gland dysfunction is a contributing factor. 21
Ingredient Comparison Overview for Common OTC Formulation Types
The table below summarizes the primary active ingredients found across major OTC dry eye drop categories, along with their general target applications, based on product labeling and published clinical data referenced throughout this article.
| Active Ingredient | Concentration Range | Primary Target Application | Preservative Format Common |
|---|---|---|---|
| Carboxymethylcellulose (CMC) | 0.5% w/v | Mild to moderate aqueous deficiency | Preserved and preservative-free |
| Hydroxypropyl methylcellulose (HPMC) | 0.3% w/v | General lubrication and tear supplementation | Preserved (oxychloro complex) |
| Glycerin | 0.2% to 0.9% w/v | Hydration and lubrication, often combined | Preservative-free multi-dose |
| Sodium hyaluronate (HA) | 0.1% to 0.3% | Moderate to severe dry eye, tear film stability | Preservative-free preferred |
| Mineral oil / Light mineral oil emulsion | 0.5% each | Lipid layer replenishment, MGD-related evaporation | Single-dose vials (non-preserved) |
| Propylene glycol | 0.6% w/v | Tear film retention and moisture retention | Preserved and preservative-free |
| Flaxseed oil / Castor oil (lipid blend) | Variable | MGD, lipid layer fortification, all three layers | Single-use vials (preservative-free) |
Consumers should treat this framework as an educational reference rather than a product-selection guide. Individual response to any formulation varies based on the specific subtype of dry eye disease, environmental conditions, concurrent medications, and ocular surface anatomy. An eye care professional is best positioned to match formulation type to a patient's specific clinical presentation, particularly when symptoms are chronic, bilateral, or accompanied by other ocular surface changes. 2
Sources
- Montmeat D, Thouvenin A, Rasamison R, Boudy V. Physicochemical Properties and Rheological Behavior of Artificial Tears for Dry Eye Syndrome. Journal of Ocular Pharmacology and Therapeutics. 2025. doi:10.1177/108076
- American Academy of Ophthalmology. Dry Eye Treatment. aao.org/eye-health/diseases/dry-eye-treatment
- ACS Pharma. ACS Comfort Eye Drops product information: Carmellose Sodium as moisturising agent. acspharma.com
- OCuSOFT LLC. Retaine MGD OTC Label Details via OTCLabels.com. otclabels.com/lib/otc/otc-meds/retaine-mgd
- Ammar DA, Noecker RJ, Kahook MY. Effects of benzalkonium chloride-preserved, polyquad-preserved, and sofZia-preserved topical glaucoma medications on human ocular epithelial cells. Advances in Therapy. 2010;27(11):837-845.
- Cleveland Clinic. Dry Eye Disease. my.clevelandclinic.org/health/articles/12070-dry-eye-disease
- U.S. Food and Drug Administration. Eye Drops and Lubricants. fda.gov/drugs/information-drugs/eye-drops-and-lubricants
- Refresh Tears. (3 pack) Refresh Tears Multi-Dose Preservative-Free Lubricant Eye Drops product listing. Walmart.com
- DryEyeShop. Optase MGD Advanced (10mL MDPF bottle) product description. dryeyeshop.com/products/optase-mgd-advanced
- Pucker AD, Ng SM, Nichols JJ. Over the counter (OTC) artificial tear drops for dry eye syndrome. Cochrane Database of Systematic Reviews. 2016;2016(2):CD009729.
- National Eye Institute (NIH). Dry Eye. nei.nih.gov/learn-about-eye-health/eye-conditions-and-diseases/dry-eye
- 1mg. Tearz Eye Drop product information: HPMC 0.3% + Glycerin 0.2% + Dextran 70 0.1%. 1mg.com/drugs/tearz-eye-drop-977392
- Ophthalmology and Therapy, 2026. A Randomized Multicenter Study Comparing Low-Viscosity with Comparator 0.3% Hyaluronic Acid for the Treatment of Dry Eye Disease. doi:10.1007/s40123-026-01372-7
- Allergan India / 1mg. Complete 0.6% Eye Drop product information: Propylene Glycol 0.6% w/v. 1mg.com/drugs/complete-0.6-eye-drop-829309
- OPTASE. OPTASE HYLO FORTE Eye Drops product description. optase.com/product/optase-hylo-forte-eye-drops
- All About Vision. Dry Eye Drops Guide. allaboutvision.com/dry-eye/drops.htm
- Dryeye Rescue. Refresh Optive MEGA-3 Lubricant Eye Drops product description. dryeyerescue.com/products/refresh-optive-mega-3-0-4ml-vials
- Mashouf J, Wan K, Hall BJ. Comparison of Efficacy Between a Phospholipid-Hydroxypropyl Guar Nanoemulsion and Castor Oil-Based Lubricating Eyedrops. Clinical Ophthalmology. 2025.
- American Optometric Association. Dry Eye. aoa.org/patients-and-public/caring-for-your-vision/dry-eye
- Dryeye Rescue. Oasis Tears Preservative-Free Eye Drops product description. dryeyerescue.com/products/oasis-tears-preservative-free-eye-drops-multi-drop-bottle-2-pack-600-drops
- Mayo Clinic. Dry Eyes Diagnosis and Treatment. mayoclinic.org/diseases-conditions/dry-eyes/diagnosis-treatment/drc-20371876