SUPPLEMENT GUIDANCE · DRY EYE
Omega-3 for dry eyes — does it actually help?
Omega-3 supplements are one of the most common recommendations for dry eye — but the evidence is genuinely mixed. The largest clinical trial found no clear benefit, while multiple meta-analyses still show a modest positive effect, particularly for evaporative dry eye caused by meibomian gland dysfunction. Here's what we recommend and why.
Reviewed by Dr Nikki Peng, B.Optom (Hons 1st Class) UNSW · Last updated May 2026
WHAT DOES THE RESEARCH SAY?
The evidence is genuinely mixed
The DREAM study was well-designed, but it had limitations. The placebo was olive oil — which may not be biologically inert. Around 75% of participants changed their other dry eye treatments during the trial, making it harder to isolate the effect of omega-3 alone. And both groups improved significantly, suggesting a strong placebo or regression-to-the-mean effect.
Meanwhile, the Wang & Ko meta-analysis (2023, 19 RCTs, 4,246 patients) found that omega-3 did produce meaningful improvements — and that three factors predicted a better response: higher daily dose, longer duration, and a higher percentage of EPA in the formulation.
The most recent guidance — the TFOS DEWS III Management and Therapy Report (2025) — keeps omega-3 in the first-line tear-film algorithm, particularly for meibomian gland dysfunction. The international consensus is cautiously positive, not dismissive.
WHO BENEFITS FROM OMEGA-3?
It works best for one specific type of dry eye
If your dry eye is aqueous-deficient (not enough tear fluid, often associated with autoimmune conditions like Sjögren's syndrome), the evidence for omega-3 is weaker. It may still help as part of a broader plan, but it's not where the research is strongest.
Patients with a low dietary intake of oily fish tend to notice the most difference — if you're already eating salmon three times a week, adding a supplement may not move the needle much. Screen-heavy workers with mild-to-moderate symptoms are also good candidates.
If you're already on IPL treatment and a full lid hygiene routine, the incremental benefit of adding omega-3 may be smaller. That's part of why the DREAM trial — where most participants were on multiple treatments simultaneously — had trouble detecting a clear signal.
WHAT WE RECOMMEND AT CONCORD EYECARE
Two options depending on where you're starting
We take a two-tier approach. If you've been diagnosed with evaporative dry eye or MGD, we'll typically start with a topical option and add oral supplementation if needed.
FIRST LINE · TOPICAL
NovaTears+Omega-3 Eye Drops
A water-free drop that delivers DHA directly to your tear film using a perfluorohexyloctane carrier. Low barrier to entry — no capsules, no absorption questions. Used 3–4 times daily.
Early research (Jacobi 2022) showed significant improvements in tear break-up time and symptoms at 8 weeks, though larger trials are still needed.
ADD IF NEEDED · ORAL
Lacritec (or equivalent rTG supplement)
An oral omega-3 in re-esterified triglyceride form — more bioavailable than the cheaper ethyl ester form used in most supermarket brands. We recommend approximately 2,000mg combined EPA and DHA per day, taken with a fatty meal.
Higher EPA ratio preferred. Research suggests EPA is the more active component for reducing eyelid inflammation (Wang & Ko 2023).
Diet comes first
Before reaching for supplements, we talk about diet. Two to three servings of oily fish per week (salmon, sardines, mackerel) provides meaningful omega-3 intake. Whole-food sources may work differently from supplements — there are synergistic nutrients in fish that capsules don't replicate. Reducing omega-6 intake (processed foods, vegetable oils) also helps shift the inflammatory balance.
Omega-3 is especially relevant for patients with poor gut health, autoimmune conditions, or diets low in fish — the context matters as much as the supplement.
HOW LONG DOES OMEGA-3 TAKE TO WORK?
Give it two months — then reassess
If omega-3 alone isn't enough, we escalate to clinical treatments like IPL therapy, anti-inflammatory drops, or further investigation into what's driving your symptoms. Omega-3 is one tool in the kit, not the whole kit.
WHO SHOULD AVOID OMEGA-3 SUPPLEMENTS?
A few groups need to check first
At standard dry-eye doses (1,000–2,000mg/day), omega-3 is generally well-tolerated. The most common side effects are mild — fishy aftertaste or reflux. Taking capsules with food and choosing an rTG form reduces both.
The bleeding-risk concern is largely theoretical: a 2024 systematic review in the Journal of the American Heart Association found no significant increase in bleeding at standard doses. But if you're on anticoagulants, it's worth a conversation with your prescribing doctor.
COMMON QUESTIONS
Omega-3 and dry eye — your questions answered
Does omega-3 really help dry eyes?
The evidence is mixed. The largest trial (DREAM) found no benefit over olive oil, but pooled data from multiple trials still shows modest improvements — particularly for MGD-driven dry eye. We recommend it as part of a broader treatment plan, not as a standalone fix.
What type of omega-3 is best for dry eyes?
Look for a re-esterified triglyceride (rTG) form with a high EPA-to-DHA ratio. EPA appears to be the more active component for reducing eyelid inflammation. Take with a fatty meal for better absorption.
How much omega-3 should I take for dry eyes?
Research supports around 2,000mg of combined EPA and DHA per day. The NHMRC recommends not exceeding 3,000mg/day from supplements. Always check the label for actual EPA+DHA content — not just total fish oil weight.
Is fish oil the same as omega-3?
Not exactly. Fish oil contains omega-3 fatty acids (EPA and DHA), but the concentration varies widely. A standard 1,000mg fish oil capsule might contain only 300mg of actual EPA+DHA. Look for products that list EPA and DHA content separately.
Can I get enough omega-3 from food alone?
Possibly — 2–3 servings of oily fish per week (salmon, sardines, mackerel) provides meaningful intake. Plant sources like flaxseed contain ALA, which converts poorly (under 5%) to EPA and DHA. If your diet is already fish-rich, supplementation may add less.
REFERENCES
1. Asbell PA, Maguire MG, Pistilli M, et al. n-3 Fatty Acid Supplementation for the Treatment of Dry Eye Disease. N Engl J Med 2018;378(18):1681–1690.
2. Wang WX, Ko ML. Efficacy of Omega-3 Intake in Managing Dry Eye Disease: A Systematic Review and Meta-Analysis. J Clin Med 2023;12(22):7026.
3. Downie LE, Ng SM, Lindsley KB, Akpek EK. Omega-3 and omega-6 polyunsaturated fatty acids for dry eye disease. Cochrane Database Syst Rev 2019;12:CD011016.
4. Eom Y, Jun I, Jeon HS, et al. Re-Esterified Triglyceride ω-3 Fatty Acids in Dry Eye Disease With MGD. JAMA Ophthalmol 2024;142(7):617–624.
5. Jones L, Craig JP, Markoulli M, et al. TFOS DEWS III: Management and Therapy Report. Am J Ophthalmol 2025;279:289–386.
6. Jacobi C, Angstmann-Mehr S, Lange A, Kaercher T. A Water-Free Omega-3 Fatty Acid Eye Drop Formulation for Evaporative Dry Eye Disease. J Ocul Pharmacol Ther 2022;38(5):348–355.
7. Downie LE, Gad A, Wong CY, et al. Omega-3 Fatty Acids and Eye Health: Opinions and Self-Reported Practice Behaviors of Optometrists in Australia and New Zealand. Nutrients 2020;12(4):1179.
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