Dry eyes have a cause. Let’s find yours.

Symvana is an independent guide to dry, tired and screen-strained eyes. Take a three-minute quiz to see what’s most likely behind your symptoms and which drops, masks and treatments the research actually supports.

Take the Dry Eye Profile Test my blink rate

Free, no sign-up, and your answers stay on your device.

since the last blink

Blink. The oil layer spreads back over the eye.

Fig. 1 A live simulation of your tear film’s oil layer, colored the way it looks through a clinical interference camera. Healthy films hold for 10 seconds or more. This one starts to break up sooner. Tap or click the lens to blink.

16.4 million

US adults have been diagnosed with dry eye. Many more call it tired eyes and never get it checked.

Farrand et al., 2017 (opens in a new tab)

86%

of people with dry eye in a large clinic study showed signs of struggling oil glands in their eyelids. Watery drops alone can’t fix that.

Lemp et al., 2012 (opens in a new tab)

4.5

blinks a minute while reading, down from about 17 at rest. On screens, more of those blinks only close halfway.

Bentivoglio et al., 1997 (opens in a new tab)

Your tear film has three layers. Most drops only help one.

Dry eye isn’t one problem. It’s a failure in one or more layers of a film far thinner than a hair. Knowing which layer is struggling is the difference between relief and another half-used bottle in the drawer.

Cross-section of the tear film A thin oil layer sits on top of a thick water layer, which rests on a mucin layer anchored to the living cells of the eye’s surface. Oil layerslows evaporation Water layerhydrates and protects Mucin layerhelps tears spread Eye surfacecells that must stay wet

Fig. 2 The tear film in cross-section. Not to scale: the water layer is many times thicker than the oil layer above it.

The oil layer

A film of oils, thinner than a soap bubble, that slows evaporation. When it runs thin, the water beneath it evaporates in seconds. This is the most common reason for dry eye.

Made by
Meibomian glands, dozens of tiny glands lining the edge of each eyelid.
When it fails
Burning, gritty eyes that get worse on screens and through the day, vision that blurs and clears when you blink, and oddly watery eyes.
What helps
Warm compresses, lid hygiene, oil-based drops and, in a clinic, IPL or thermal pulsation.
How to do a warm compress that works

Three minutes to your dry eye type.

Fifteen questions about your symptoms, habits, health and surroundings. The Dry Eye Profile weighs them the way an eye doctor works through a history, then shows which layer is likely struggling and what to try first.

  • Your likely type: oil layer, water layer or a mix of both
  • A symptom score you can retake and track over time
  • Flags for eyelid mites, allergy, medications and night-time dryness
  • A plan that runs from free habits to clinic treatments
Start the profile Private. Nothing leaves your browser unless you ask us to email your plan.

Example result

Oil layer, leaning evaporative

48symptom load
Oil layer78
Water layer34
Eyelids52
Screens70

Your first three moves

  1. Ten minutes with a heated mask each evening
  2. Switch to an oil-based, preservative-free drop
  3. Clean your lash line daily for four weeks

Free tools for tired eyes.

Everything runs in your browser. Nothing to install, and your camera feed never leaves your device.

How often do you really blink?

Read a short passage while your webcam counts your full and half blinks. Takes 60 seconds, and shows how your rate compares with resting and reading averages.

Talking26
Resting17
Reading4.5
You?

Average blinks per minute in healthy adults, from Bentivoglio et al., 1997.

Take the Blink Test

Eye Break Timer

20-20-20 reminders that keep firing when the tab is in the background, with a guided 20-second break.

Start a timer

Drop Decoder

Paste the ingredients from any eye drop box. See what each one does, which preservatives to watch and whether it suits your type.

Decode a label

What actually works, graded.

Every remedy gets an evidence grade, and every grade links to its source. Some popular ones don’t make the cut.

Dry eye remedies graded by strength of evidence
RemedyWhereEvidenceCost
Preservative-free artificial tearsThe sensible first step for almost everyone. Pick preservative-free if you use drops more than four times a day, and match the formula to your type.Pucker et al., Cochrane Database of Systematic Reviews, 2016 (opens in a new tab) Over the counter Good $About $10 to $25 a month
Warm compress with a heat-holding maskSoftens thickened oil in the eyelid glands, but only if the heat stays above about 40°C for around ten minutes. A microwaved mask does that. A washcloth doesn’t.Review of warm compress therapy in MGD, 2024 (opens in a new tab) At home Good $One-off $15 to $35
Blink exercisesA small trial found a month of simple blink drills improved symptoms and tear film stability. Promising, free and takes two minutes.Kim et al., Contact Lens & Anterior Eye, 2021 (opens in a new tab) At home Mixed Free
Omega-3 fish oil supplementsThe largest trial gave people 3,000 mg a day for a year. They did no better than people taking olive oil.DREAM Study Research Group, New England Journal of Medicine, 2018 (opens in a new tab) Over the counter Mixed $$About $15 to $45 a month
Blue light glasses for eye strainA 2023 Cochrane review found they probably make no difference to eye strain from screens. Spend the money elsewhere.Singh et al., Cochrane Database of Systematic Reviews, 2023 (opens in a new tab) Over the counter Weak $$About $20 to $100
Lotilaner (Xdemvy) for DemodexTwo phase 3 trials. In one, 56% of patients had their lash debris fully cleared after six weeks, against 12.5% on placebo.Saturn-2 phase 3 trial, Ophthalmology, 2023 (opens in a new tab) Prescription Strong $$$Varies with insurance
Intense pulsed light (IPL)Pulses of light on the skin below the eyes improve oil gland function and tear stability. Especially useful if you also have rosacea.Healio, April 2021 (opens in a new tab) In a clinic Good $$$$Often $300 to $600 a session, usually 3 to 4 sessions
Strong evidenceGood evidenceMixed evidenceWeak evidence
See all 20 remedies

The research radar.

New approvals, rejections and studies, translated into what they mean for your eyes. Updated as the science moves.

Dry eye

Dry eye gets an updated definition

Expert consensus

The Tear Film & Ocular Surface Society published TFOS DEWS III, its third global report on dry eye. Symptoms are now a required part of the diagnosis, and nerve problems are named as a cause alongside inflammation and tear instability.

Source: Association of Optometrists news, June 2025 (opens in a new tab)

Everything on the radar

The rules we work by.

Evidence
Every claim links to its source, and every remedy carries a grade from Strong to Weak. When the research changes, the grade changes with it.
Privacy
The profile, blink test and timer run in your browser. We never see your camera, and your answers aren’t sent anywhere unless you ask us to email your plan.
Money
We earn from affiliate links, clinic partners and newsletter sponsors. None of them can change a grade. How we make money.

When drops aren’t enough, the fix is usually in a clinic.

Blocked oil glands, eyelid mites and long-running inflammation don’t respond to anything on a pharmacy shelf. A dry eye specialist can measure what’s going on and treat the cause.

Find a dry eye specialist Compare treatments
  • Intense pulsed lightOil glands, rosacea
  • Thermal pulsationBlocked glands
  • Lotilaner dropsEyelid mites
  • Anti-inflammatory dropsChronic inflammation
  • Punctal plugsLow tear volume