Dry eye after LASIK: how long does it last?

You had the surgery to be free of glasses, and for the vision, it worked. But now your eyes burn by the afternoon, feel gritty when you wake, and no one quite warned you it would be like this. If you were told dry eye was a minor, short-lived side effect and it doesn’t feel minor, you aren’t imagining it and you aren’t an unusual case.

Dry eye is the most common complaint in the months after LASIK. Understanding why it happens makes the recovery timeline a lot less frightening.

Why does LASIK cause dry eye in the first place?

The cornea, the clear front window of your eye, is one of the most densely nerve-supplied surfaces in the body. Those nerves do two jobs. They make the eye sensitive, and they act as a feedback loop: when the surface starts to dry, the nerves signal the tear glands to produce more tears and prompt you to blink.

LASIK works by creating a thin flap in the cornea, lifting it, reshaping the tissue underneath with a laser, then laying the flap back down. Creating that flap cuts through a large number of those corneal nerves. SMILE and PRK disrupt the nerves too, though the pattern differs between techniques.

With the feedback loop dampened, two things happen. The eye is slower to sense that it’s drying, so it doesn’t trigger tears when it should. And the reduced sensation can mean you blink less often and less completely. The surface dries out between blinks and the tear film becomes unstable. This is why the dryness after LASIK can feel out of proportion to how the eye looks: the signalling is disrupted, not just the moisture.

How long does dry eye after LASIK usually last?

For most people it takes three to six months, improving gradually rather than switching off one day.

The corneal nerves regrow slowly. In the first few weeks after surgery they’re at their most disrupted, which is when symptoms are typically strongest. Over the following months the nerve density recovers, the feedback loop starts working again, and the dryness eases for the majority of people.

A smaller group notice symptoms beyond six months, and a minority beyond a year. This doesn’t mean something has gone wrong (nerve regrowth genuinely varies between people), but persistent symptoms are worth a proper tear-film assessment rather than just waiting it out. Sometimes what looks like slow LASIK recovery is a separate, treatable problem such as meibomian gland dysfunction that was there beforehand and is now more noticeable.

Why are my eyes worse in the morning or on screens?

Two everyday situations tend to expose post-LASIK dryness.

Mornings are common because some people don’t fully close their eyes overnight, and the reduced corneal sensation after surgery can make incomplete closure less noticeable. The surface dries through the night and you wake with grittiness or a scratchy, stuck feeling that eases after you have been up and blinking for a while.

Screens make it worse because concentrated visual tasks cut your blink rate substantially. When you’re already blinking less completely because of nerve disruption, adding hours of screen work on top removes even more of the surface’s chance to re-wet. This isn’t unique to LASIK, but a recovering cornea has less margin.

Does the type of laser surgery change the risk?

The technique matters, because how much of the corneal nerve supply gets disturbed differs between procedures.

LASIK creates a hinged flap, which cuts nerves around most of the flap’s edge. That relatively large disruption is why LASIK has the strongest association with early dry eye. SMILE removes a small lens-shaped piece of tissue through a much smaller incision, so fewer nerves are cut, and several studies suggest less dry eye in the early months than LASIK. PRK removes the surface layer entirely and lets it heal back, which disturbs the nerve endings differently again, with its own recovery pattern.

None of this means one procedure is dry-eye-proof. All of them disturb the surface nerves to some degree, and all of them can cause temporary dryness. What it means is that if you already have marginal tear function, the choice of technique is a genuine part of the pre-surgery conversation, not an afterthought. A surgeon who assesses your tear film properly beforehand can factor your baseline dryness into which procedure they recommend, or whether to treat existing dry eye first.

The single strongest predictor of ongoing dryness after any of these is untreated dry eye going into surgery. That’s the lever you and your surgeon have most control over, and it’s worth taking seriously before the day rather than discovering it afterwards.

What actually helps while the nerves recover?

The aim through recovery is to keep the surface comfortable and stable while your own nerves and tear signalling come back online.

• Lubricating drops, used regularly. Preservative-free artificial tears are the mainstay in the early months. Using them on a schedule rather than only when the eye already feels dry tends to keep the surface more stable. Your surgeon will guide how often in the first weeks.
• Night-time protection. If you wake up dry, a thicker gel or ointment at bedtime holds moisture through the night. Some people benefit from measures that reduce overnight exposure, which your clinician can advise on.
• Screen habits. Deliberate, complete blinks and regular breaks from close work reduce the load on a recovering surface.
• Treating the glands and lids. If you have underlying meibomian gland dysfunction or blepharitis, treating it directly matters, because artificial tears alone won’t fix an oil-layer problem sitting underneath the post-surgical dryness.
• Tear conservation. For dryness that’s slow to settle, some clinicians consider punctal plugs, small inserts that reduce tear drainage so your natural tears stay on the eye longer. Whether this suits you is a clinical decision.

What no honest source can promise is a fixed date when it will be gone, because nerve recovery isn’t on a schedule. What is fair to say is that the trajectory for most people is steadily better over months, not worse.

When should I go back and get it checked?

Book a review sooner rather than waiting it out if:

• Symptoms are getting worse rather than gradually better after the first couple of months.
• The dryness isn’t responding to the drop routine your clinic recommended.
• You have pain that feels out of proportion to how the eye looks, or fluctuating vision that a proper blink doesn’t clear.
• You’re past six months and still significantly affected.

Your surgeon should be the first port of call in the early healing window. Beyond that, an optometrist who does a full dry eye workup (looking at the oil glands, tear break-up time and the lid margins, not just a standard sight test) can tell you whether this is ordinary post-LASIK recovery or a separate dry eye problem that has its own treatment path.

Post-LASIK dry eye is one of the more predictable forms of the condition, because the cause is understood and the trajectory for most people points the right way. Knowing that the burning is nerves healing, not damage getting worse, is often the reassurance people most needed and were never given.