Short answer: preservative-free lubricating drops, and a lipid-based one if your eyes feel worst late in the day. Avoid anything that promises to remove redness. Drops labelled for "computer eyes" are ordinary lubricants with a different box.
That covers most people. The rest of this page explains why, because the reasons decide what to do when the first bottle does not work.
What a drop can and cannot do
Dry eye from screen work is mostly an evaporation problem. During focused work your blink rate falls by roughly two thirds, and many of the blinks that remain never fully close. The tear film is not renewed often enough, it breaks up between blinks, and the surface of the eye dries in patches. That is the burning, gritty, briefly blurry feeling by mid-afternoon.
A lubricating drop adds a temporary layer of fluid over that surface. It relieves the symptom for somewhere between a few minutes and an hour or two, depending on the formulation. It does not change how often you blink, so it does not change why the film is breaking up. That is the main limit of every product on the shelf, and it is why the people who use drops most often are usually the ones who get the least from them.
So drops are a good tool with a clear role: relief while you fix the cause, and support on the days the cause wins.
The shelf, sorted
| Type | Verdict for screen dry eye |
|---|---|
| Preservative-free lubricantSingle-use vials, or a bottle marked preservative-free | First choice |
| Lipid-based or emulsion dropsMilky; contain an oil phase | Best if symptoms build through the day |
| Gel dropsThicker; longer contact time | Evenings, or short screen breaks |
| OintmentParaffin-based | Bedtime only — it blurs vision |
| Preserved multi-dose lubricantUsually benzalkonium chloride (BAK) | Occasional use only |
| Contact lens rewetting dropsLabelled for use with lenses | If you wear lenses at the screen |
| Redness reliefVasoconstrictors, e.g. tetrahydrozoline, naphazoline | Avoid |
| "Blue light" or "computer" dropsMarketing category | Read the ingredients instead |
Why preservative-free comes first
A multi-dose bottle must stay sterile for weeks after you open it, so most contain a preservative. The most common one, benzalkonium chloride, works like a mild detergent. With occasional use that does not matter. With frequent use it damages the surface cells and the mucin-producing goblet cells that help tears stick to the eye — the same tissue you are trying to protect.
Screen dry eye is the situation where people use drops frequently: several times a day, every working day. That is exactly the pattern in which a preservative turns from harmless into part of the problem.
Two ways to avoid it:
- Single-use vials. Twist off, use, discard. The most reliable option. A vial can usually be resealed and used for a few hours if the label allows it.
- Preservative-free multi-dose bottles. These use a one-way valve or filter tip to keep the contents sterile. More convenient, less waste, and fine if the bottle says preservative-free.
A common practical guide: if you use a preserved drop more than about four times a day, switch to preservative-free. If you are unsure which you have, the ingredient list will name the preservative.
Jones, L. et al. (2017). TFOS DEWS II Management and Therapy Report. The Ocular Surface, 15(3), 575–628.
Watery, lipid or gel
Most lubricants share a small set of active ingredients: carboxymethylcellulose, hyaluronic acid (sodium hyaluronate), hydroxypropyl guar, and humectants such as glycerin or propylene glycol. They differ more in thickness than in effect. There is no strong evidence that one of these beats the others for everyone, so the right one is the one that feels best and lasts longest for you.
The category that does make a difference is the lipid-based drop. Tears have a thin oily outer layer that slows evaporation. When the glands along the lid margin that produce it are underactive — common in people who blink incompletely for hours — the film evaporates faster. Lipid drops, usually milky emulsions, add to that layer. If your eyes are fine in the morning and worst at 5pm, this is the type to try.
Gels and ointments stay on the eye longer and blur vision while they do. A gel is reasonable in the evening. An ointment belongs at bedtime, for people who wake up with dry, sore eyes.
Why redness relief makes it worse
Redness relief drops contain a vasoconstrictor. It squeezes the small surface blood vessels so the white of the eye looks white. It does nothing for dryness. When it wears off, the vessels often dilate more than before — rebound redness — and people respond by using more. A low-dose brimonidine drop marketed for whitening has a smaller rebound problem, but it is still a cosmetic product, not a dry eye treatment.
If your eyes look red after screen work, the redness is a sign of surface irritation. Treat the irritation and the redness follows.
How to use them
- Use them before it hurts. One drop in each eye before a long focus block works better than a rescue drop once your eyes burn.
- One drop is enough. The eye holds a fraction of a single drop; the rest runs down your cheek.
- Close your eyes for a few seconds after. Do not blink hard. Gentle closure keeps the drop on the surface instead of pumping it into the tear duct.
- Keep the tip clean. Never let it touch your eye, lashes or fingers. Discard an opened bottle by the date on the label.
- With contact lenses, use a drop labelled as compatible with lenses, or take the lenses out first.
When drops are not enough
Needing drops more than four to six times a day, every day, is information. It usually means one of two things: the cause is still running at full strength, or there is more going on than screen dryness.
For the first, the interventions with the best evidence are blink prompting, warm compresses for the lid glands, indoor humidity around 45–60%, and a monitor placed so you look slightly down, which narrows the eye opening and slows evaporation. All four are covered in what actually helps dry eyes from a computer.
For the second, an optometrist or ophthalmologist can examine the lid glands and the tear film directly. Prescription treatments for chronic dry eye exist, including anti-inflammatory drops such as cyclosporine and lifitegrast. They are not first-line for screen dryness, but they are why persistent symptoms deserve an exam rather than a bigger bottle.
- One eye is red and painful, especially if you wear contact lenses.
- Light hurts, or there is discharge.
- Your vision is reduced and does not clear when you blink.
- Drops make the pain worse rather than better.
The short version
- Buy preservative-free. Single-use vials if in doubt.
- Try a lipid-based drop if your eyes get worse as the day goes on.
- Never use redness relief for dry eyes.
- Use drops before long focus blocks, not as a rescue.
- If you need them more than a few times a day, fix the blink rate and get an eye exam.
Drops treat the symptom. Blinking treats the cause.
Screen dry eye starts with a blink rate that drops by about two thirds while you focus. Skopia is a quiet Mac menu bar app that prompts a full blink on a timer. No camera, no subscription, no account.
Get Skopia — $4.99 →