Dry Eyes: Causes and What Actually Helps

Dry eye isn't simply a shortage of tears. In most cases there are plenty of tears — they just evaporate too quickly, because the thin layer of oil that should hold them in place isn't being made properly.

That distinction changes what works. Here's what's actually going wrong, why it's so much commoner in women, and which treatments have something behind them.

Around four in five cases of dry eye are evaporative — the oil glands in the eyelid margins aren't producing enough lipid, so tears evaporate before they should. The rest involve reduced tear production. Hormonal change around menopause, screen use, medications and contact lenses are the usual drivers. The most effective home measure is a properly sustained warm compress, not drops — and watery eyes are often a symptom of dryness rather than the opposite.

The tear film has three layers

Understanding this makes everything else make sense.

The mucin layer sits innermost, produced by goblet cells in the conjunctiva. It lets the watery layer spread evenly across the eye rather than beading up.

The aqueous layer is the bulk of it — water, salts, proteins and antimicrobial compounds from the lacrimal gland.

The lipid layer is outermost, a microscopically thin film of oil produced by the meibomian glands — roughly 25 to 40 of them along each eyelid margin, opening just behind your lashes. Its job is to seal the surface and stop the watery layer evaporating.

That oil layer is where most dry eye goes wrong.

The two types

	Evaporative	Aqueous-deficient
Share of cases	Around 80%	Around 10%, plus mixed
Problem	Oil layer fails, tears evaporate	Not enough tears produced
Cause	Meibomian gland dysfunction	Lacrimal gland underperforms
Associated with	Blepharitis, screens, age, hormones	Sjögren's, autoimmune disease, medications
Best first measure	Warm compresses and lid care	Artificial tears, specialist assessment

Plenty of people have a mix of both. The practical point is that if you've been using drops without much success, the oil layer may be the part that needs attention.

Why watery eyes can mean dry eyes

This confuses almost everyone who has it.

When the ocular surface dries out and becomes irritated, it triggers a reflex tearing response — a sudden flood of watery tears from the lacrimal gland. But reflex tears are mostly water, lacking the oil and mucin that make a stable film, so they sheet off the eye and down your cheek without fixing anything.

The result is an eye that streams in wind or cold air while being genuinely dry underneath. If your eyes water and feel gritty, that's the pattern, and treating the dryness is what stops the watering.

What causes it

Hormonal change — and why women are affected more

Dry eye is substantially more common in women, and incidence rises noticeably around and after menopause. The mechanism is specific rather than vague.

The lacrimal and meibomian glands both carry receptors for sex hormones. Androgens appear particularly important for meibomian gland function — they influence the quality and quantity of the oil those glands produce. Androgen levels decline with age in women as well as men, and the hormonal shifts of perimenopause and menopause affect this system directly.

Which is why dry, gritty, tired eyes turn up as a menopause symptom that almost nobody warns you about. If other things changed around the same time, our guide to the stages of perimenopause and menopause covers what else shifts.

Worth noting that hormone therapy isn't a reliable fix here — some studies have found oestrogen-only therapy associated with more dry eye, not less. It's a conversation for your doctor rather than an assumption.

Screens

Blink rate falls sharply during concentrated screen work, and blinks become incomplete — which matters doubly, because a full blink is what squeezes the meibomian glands and releases their oil. Covered in our guide to digital eye strain.

Medications

A long and under-recognised list:

• Antihistamines and decongestants
• Some antidepressants, particularly older tricyclics
• Beta blockers and some other blood pressure medicines
• Diuretics
• Isotretinoin for acne — a well-known cause, affecting the meibomian glands directly
• Hormonal contraception and hormone therapy in some people
• Anticholinergics of any kind

Don't stop a prescribed medication over this — but do mention it, because an alternative often exists.

Everything else

• Age — tear production declines
• Contact lenses — they sit in the tear film and disrupt it
• Blepharitis — inflammation of the lid margins, closely tied to meibomian dysfunction
• Environment — air conditioning, central heating, wind, low humidity, aircraft cabins
• Autoimmune conditions — Sjögren's syndrome, rheumatoid arthritis, lupus, thyroid eye disease
• Laser eye surgery — common afterwards, usually improving over months
• Smoking
• Vitamin A deficiency — a genuine cause, though uncommon in well-fed populations; see our guide to vitamin A and the eyes

Warm compresses, done properly

This is the highest-value home measure for evaporative dry eye, and most people do it ineffectively.

The oil in blocked meibomian glands is thickened and waxy. It needs sustained warmth to soften enough to express — and a damp flannel drops below useful temperature within about two minutes, which is why it rarely achieves anything.

1. Use a microwavable eye mask designed for the purpose, or a flannel you re-warm repeatedly.
2. Hold it on closed lids for around 10 minutes. Comfortably warm, never hot.
3. Then massage — gentle sweeping strokes along the upper lid downward and the lower lid upward, toward the lash line, to push the softened oil out.
4. Then clean the lid margins with a dedicated lid wipe or diluted baby shampoo on a cotton pad.
5. Do it daily for several weeks before judging it. This is a maintenance habit, not a one-off.

Done consistently, this helps a large proportion of people more than any drop will.

Drops: what to choose

Preservative-free artificial tears are the default. If you use drops more than a few times a day, preservatives themselves can irritate the surface — preservative-free vials avoid that.

Lipid-containing drops are formulated for evaporative dry eye and supplement the oil layer rather than just the water. Worth trying if plain tears haven't helped.

Gels and ointments last longer but blur vision, so they're best overnight.

Avoid "redness relief" drops. Most work by constricting blood vessels, which whitens the eye without treating anything and can cause rebound redness with regular use.

Prescription and in-office options

If home measures aren't enough, there's a real ladder beyond them — worth knowing, because many people assume drops are the end of the road.

• Anti-inflammatory prescription drops such as ciclosporin or lifitegrast, which target the inflammation underlying chronic dry eye
• A short course of steroid drops for a flare, under supervision
• Punctal plugs — tiny inserts that block tear drainage so your own tears stay on the eye longer
• In-office gland treatments, including intense pulsed light and thermal expression
• Autologous serum drops for severe cases
• Treating blepharitis or demodex where that's the driver

Omega-3: the honest position

Fish oil is the most-recommended supplement for dry eye, and the evidence is genuinely mixed.

Several smaller studies and earlier reviews reported benefit, and the biological rationale is reasonable — omega-3 influences inflammation and may affect the composition of meibomian oil.

Then the DREAM trial, the largest and best-designed study of the question, randomised several hundred people with moderate-to-severe dry eye to omega-3 or placebo for a year, and found no significant difference in symptoms.

Where that leaves things: omega-3 may help some people, it's unlikely to harm, and it should not be the first thing you spend money on. Warm compresses and lid hygiene have a better return.

Do eye vitamins help dry eyes?

We'd rather answer this straight, because it's a question people arrive at our site asking.

Lutein and zeaxanthin are macular pigment nutrients. They concentrate in the retina, where they filter light and act as antioxidants. They have no established role in tear production, in meibomian gland function, or in the stability of the tear film.

So Bellawell's Vision Care is not a dry eye product, and we won't sell it as one. It's built for a different part of the eye and a different purpose — general eye nutrition centred on the macula.

If dry eye is what you're dealing with, the things on this page will serve you far better: a proper warm compress routine, preservative-free drops, a medication review with your doctor, and an optometrist's assessment of which type you have. That's not a sale for us, and it's the right answer.

The one nutritional exception is vitamin A deficiency, which genuinely causes ocular surface dryness — but that's a deficiency state needing diagnosis, not a reason to take a general supplement.

When to see a doctor

• Symptoms persisting despite several weeks of compresses and drops
• Eye pain, as opposed to discomfort or grittiness
• Significant light sensitivity
• Blurred vision that doesn't clear on blinking
• Discharge, crusting, or a red eye that doesn't settle
• Contact lens wearers with pain or redness — same-day care. A corneal ulcer can develop quickly and is sight-threatening
• Dry eyes alongside a persistently dry mouth — worth asking about Sjögren's syndrome, which is frequently diagnosed late
• Joint pain, fatigue or other autoimmune symptoms alongside dry eyes
• Any sudden change in vision

The bottom line

Most dry eye is evaporative — the oil layer failing, not a shortage of tears — which is why drops alone so often disappoint and why sustained warm compresses with lid massage are the highest-value thing you can do at home.

Hormonal change around menopause is a genuine and under-discussed driver, screens make it worse through reduced blinking, and a long list of common medications contributes. Watery eyes often mean dry eyes. And if drops and compresses aren't enough, there's a real prescription ladder beyond them worth asking about — far more useful than any eye vitamin, ours included.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. Bellawell Vision Care is not intended for the treatment of dry eye disease. This article is for general information and is not a substitute for medical or optometric advice. Do not stop or change any prescribed medication without speaking to your doctor. Contact lens wearers with eye pain or redness should seek same-day care. See an optometrist or doctor for persistent symptoms, eye pain, light sensitivity, discharge, blurred vision, or dry eyes alongside a dry mouth or joint symptoms. Seek urgent care for sudden vision loss, new floaters or flashes of light, or eye pain with halos around lights. Keep out of reach of children.