Viscotears Gel: Uses, Application, and Side Effects

Viscotears is a carbomer-based eye gel used primarily to relieve dry, irritated eyes when your natural tear film is not doing its job. It contains polyacrylic acid (carbomer 980), which forms a transparent gel on the surface of the eye that holds moisture in place longer than standard watery eye drops. In clinical trials, this type of gel has consistently reduced dry eye symptoms like grittiness, burning, and dryness, and about nine out of ten patients in studies rated its tolerability as good or very good. The product is available over the counter in many countries, but there are details worth knowing about how to use it, what side effects to expect, and how it stacks up against alternatives.

What Viscotears Does and How Its Gel Works

The active ingredient in Viscotears is carbomer 980, a type of polyacrylic acid. When you squeeze a drop of the gel onto your eye, the carbomer interacts with the natural pH and salts in your tear film and spreads into a thin, clear layer over the cornea. This layer acts as a reservoir, holding water against the eye surface and reducing evaporation. The result is that your eye stays lubricated for a longer stretch than it would with a simple saline or watery drop.

Carbomers are used in ophthalmic products specifically because they extend the time that an active ingredient or moisture stays in contact with the cornea. This prolonged contact time is what makes carbomer gels useful not only for dry eye relief but also as a vehicle for delivering other medications to the eye surface.

Primary Uses

Viscotears is indicated for the relief of dry eye symptoms. Dry eye can arise from many causes: aging, hormonal changes, extended screen time, air conditioning, certain medications, or autoimmune conditions like Sjögren’s syndrome. Whatever the underlying reason, the immediate problem is the same. The tear film breaks down too quickly, and the exposed corneal and conjunctival surfaces become irritated.

In a randomized trial comparing polyacrylic acid gel (Viscotears) to polyvinyl alcohol drops, patients using Viscotears saw a significantly greater reduction in a combined score of symptoms and signs, including grittiness, burning, dryness, and light sensitivity, at both two and four weeks. The gel was rated as better tolerated and more effective than the polyvinyl alcohol alternative.¹ A second randomized trial over six weeks confirmed these findings and added a practical detail: patients using Viscotears needed to apply it significantly less often, on 93% of the study days, than those using the watery polyvinyl alcohol drops.²

Patients with moderate-to-severe dry eye have also been studied in placebo-controlled settings. Carbomer gel significantly reduced dryness, discomfort, and foreign body sensation compared to placebo, and it improved objective measures of corneal surface health. Patients with severe disease responded faster, with measurable improvement by around day ten, while those with moderate disease improved by about six weeks.³

How to Apply Viscotears

The gel comes in small single-dose units (often called “unit dose vials” or “EDOs”) or in multi-dose tubes, depending on the formulation available in your market. Single-dose units are preservative-free, which matters if you are using it frequently or have sensitive eyes. Here is a practical rundown:

Wash your hands before handling the vial or tube to reduce the risk of introducing bacteria into the eye.
Tilt your head back and pull down the lower eyelid gently to create a small pocket between the lid and the eyeball.
Squeeze one drop into that pocket. Avoid touching the tip of the vial to your eye or eyelid.
Blink gently a few times to spread the gel across the eye surface. Some people find closing the eye for a moment helps it distribute evenly.
Discard single-dose units after one use, even if some gel remains. Preservative-free vials are not designed for re-capping and reuse.

Viscotears is typically applied three to four times a day, or as needed. In the comparative trials, patients using polyacrylic acid gel instilled it less frequently than those on watery drops and still got better symptom control. If you find yourself needing it more than five or six times a day over an extended period, that is worth mentioning to an eye care professional, as it may suggest your dry eye needs a different treatment strategy beyond lubrication alone.

Side Effects and Tolerability

The most talked-about side effect of Viscotears is temporary blurred vision immediately after application. Because the gel is thicker than watery drops, it takes a moment to spread evenly and clear. This blurring is usually mild and resolves within a few minutes, but it is worth planning around: avoid applying the gel right before driving or any task that requires sharp vision.

In a trial comparing Viscotears to another dry eye gel (Lacrinorm), the most commonly reported adverse events across both groups were mild discomfort on instillation, blurred vision, slight eye redness, burning, and itching. No serious adverse events were reported in either group, and about 91% of patients in both groups rated their tolerability as good or very good by day thirty.⁴ The six-week randomized trial against polyvinyl alcohol noted that blurred vision was more common with the gel formulation, but it was typically mild and short-lived.²

Allergic reactions to carbomer itself are rare, though some multi-dose formulations contain preservatives like cetrimide or benzalkonium chloride that can irritate the eye with prolonged use. If you are using Viscotears multiple times daily over weeks or months, choosing the preservative-free single-dose version can reduce that risk. Signs that something is off include persistent redness, swelling of the eyelids, worsening irritation, or any discharge that was not there before. Those warrant a visit to your pharmacist or doctor.

How Viscotears Compares to Other Artificial Tears

The artificial tear market is crowded. Products range from thin, watery drops to thick ointments, with gels like Viscotears sitting somewhere in the middle. The trade-off is straightforward: thinner products cause less blurring but evaporate faster and need to be reapplied more often, while thicker products last longer but temporarily cloud your vision.

Head-to-head trials give a reasonable picture of where Viscotears lands. Against polyvinyl alcohol drops, one of the most common over-the-counter options, Viscotears delivered better symptom and sign improvement at two, four, and six weeks while being used fewer times per day.¹ Against Lacrinorm, an eyelash-based gel containing hydroxypropyl guar, both products performed similarly, with no statistically significant difference between them after thirty days.⁴

When carbomer-based gels were compared with cellulose-based drops and mineral oil-based products in another trial, patients in all three groups improved, but subjective assessment was better in the carbomer group.⁵ The practical takeaway: carbomer gels tend to perform at least as well as most alternatives in clinical trials, with the main downside being that transient blur.

For nighttime use, many people switch to a thicker ointment like paraffin-based products, since blurred vision does not matter when your eyes are closed. Viscotears can be used at night too, but it does not stay in place as long as a heavy ointment. Some people use Viscotears during the day and an ointment at bedtime as a practical combination.

Use After Eye Surgery

Dry eye symptoms are common after certain eye procedures, especially LASIK and cataract surgery, because the surgery disrupts the nerve feedback loop that stimulates tear production. Carbomer gels like Viscotears are frequently used during the post-operative recovery period to keep the cornea lubricated while the nerve supply regenerates.

There is also a different surgical context where Viscotears shows up: protecting the eyes during general anesthesia. When you are under anesthesia your blink reflex stops, and the cornea can dry out or get scratched if left unprotected. A study comparing clear carbomer gel to traditional eye ointment found that the gel caused significantly less foreign body sensation, fewer stuck-together eyelashes, and less annoyance from blurred vision after the patient woke up.⁶ Many anesthetists now prefer a gel like Viscotears for corneal protection during shorter procedures for exactly this reason.

Viscosity, Duration, and How Often You Actually Need to Apply

One of the most practical questions people have about any eye lubricant is how long each dose lasts. With thin drops, the answer is sometimes less than an hour. Gels generally last longer, but individual variation is large. A survey-based study of dry eye patients, including many with Sjögren’s syndrome, found a general trend that more viscous preparations were instilled less frequently and were perceived to last longer, though the correlation did not reach statistical significance across the whole group.⁷ In other words, the gel does seem to hang around longer than a watery drop for most people, but how much longer varies quite a bit depending on the severity of your dry eye, your environment, and your individual tear chemistry.

If you are working in an air-conditioned office or staring at screens for long stretches, you will likely go through Viscotears faster than someone in a humid environment who takes regular screen breaks. Blinking rate drops substantially during focused screen work, and each blink is what refreshes and redistributes the gel layer. Fewer blinks means faster drying. Some people find that simply making a conscious effort to blink more often lets them stretch the interval between applications.

Contact Lenses and Viscotears

Most carbomer gels, Viscotears included, are not recommended for application while soft contact lenses are in place. The gel can interact with the lens material, and some formulations contain preservatives that can be absorbed by soft lenses and cause irritation. Hard (rigid gas-permeable) lenses are generally less of a concern, but you should still check the specific product labeling or ask your optometrist.

The standard advice is to remove soft lenses before instilling the gel and wait at least fifteen minutes before reinserting them. For people who wear lenses all day and also have dry eyes, this is admittedly inconvenient. Some opt for preservative-free watery drops during contact lens wear and switch to Viscotears in the evening after lens removal, when the gel’s longer duration is more useful and the brief blurring is less of an issue.

When Viscotears Is Not Enough

Artificial tears, whether gels or drops, treat the symptom rather than the underlying cause of dry eye. For many people with mild-to-moderate dryness, that is perfectly adequate and all they need. But dry eye exists on a spectrum, and at the more severe end, lubricants alone may not control the problem.

Signs that you might need more than Viscotears include persistent redness that does not improve with use, worsening symptoms over weeks despite regular application, significant pain rather than just discomfort, or any change in your vision beyond the brief post-application blur. In these situations, an eye care professional might consider anti-inflammatory drops like cyclosporine, punctal plugs to slow tear drainage, or investigation into underlying conditions driving the dryness.

It is also worth noting that some medications are well-known for contributing to dry eyes. Antihistamines, certain antidepressants, beta-blockers, and oral contraceptives can all reduce tear production. If you started Viscotears around the same time as a new medication and your eyes are still miserable, the medication might be part of the problem. That does not mean stopping it on your own, but it is a conversation to have with whoever prescribed it.

Storing and Handling the Gel

Viscotears should be stored below 25°C and kept out of direct sunlight. The gel has a limited shelf life once opened: multi-dose tubes typically need to be discarded 28 days after first use because preservative effectiveness decreases over time. Single-dose units should be used immediately after opening and any remaining gel thrown away.

One quirk of carbomer gels that catches people off guard: the gel can sometimes feel slightly stringy or leave faint white residue on the eyelashes after application. This is not a sign of contamination or a problem with the product. It is just the physical nature of carbomer when it partially dries at the lid margin. Wiping it gently with a clean tissue or damp cotton pad takes care of it. If you notice this happening frequently, you may be squeezing out more gel than you need per application. A single small drop is typically enough.