How Long to Use Artificial Tears After Lasik?

Why Do Eyes Feel Dry After LASIK?

LASIK involves creating a corneal flap and reshaping the underlying tissue with a laser. During this process, superficial corneal nerves are severed. These nerves normally signal your brain to produce tears, so once they’re cut, the feedback loop is temporarily broken—your eyes don’t realise they’re drying out, and tear production drops.

This nerve-mediated dryness peaks in the first few weeks and gradually improves as the nerves regenerate over 3–6 months. In some patients—especially those with pre-existing dry eye or those who had higher corrections—the process takes longer. Understanding how LASIK affects the tear film helps explain why consistent artificial tear use isn’t optional during this window; it’s essential for both comfort and healing quality.

Week-by-Week Timeline for Artificial Tear Use

Week 1–2: Maximum Frequency

During the first two weeks, apply preservative-free artificial tears every 1–2 hours while awake—even if your eyes feel fine. Remember, the nerve damage means you may not feel dryness even when the surface is under-lubricated. Your surgeon will also prescribe medicated drops (antibiotic and steroid); artificial tears should be instilled at least 5 minutes apart from these. For a complete overview of your prescribed regimen, see how long to use steroid drops after LASIK.

Week 3–4: Begin Tapering

By the third week, most patients can reduce to 4–6 times per day. Pay attention to triggers: screen work, air conditioning, windy environments, and reading all increase evaporation. If you notice blurring that clears with a blink or a drop, that’s a sign you need more lubrication, not less.

Month 2–3: Symptom-Based Use

At this stage, shift from a fixed schedule to symptom-based application. Many patients settle into using drops 2–4 times daily—typically morning, midday, and evening. If you’re working long hours on a computer, you may need more.

Month 3–6: Gradual Reduction

Corneal nerve recovery is well underway by this point. Most patients are down to 1–2 applications per day or using drops only when symptomatic. If you’re comfortable without drops for most of the day, that’s a strong sign your natural tear production is recovering.

Beyond 6 Months

The majority of LASIK patients can stop routine artificial tear use by 6 months. However, a subset—roughly 10–15%—experience prolonged dryness that may require ongoing lubrication for a year or more. If you’re in this group, your surgeon may investigate underlying causes. Our article on permanent dry eyes after LASIK explains when dryness crosses from normal recovery into a condition that needs targeted treatment.

Which Artificial Tears Should You Use?

Preservative-Free Drops (First 4–6 Weeks)

For the early recovery period, preservative-free single-use vials are non-negotiable. Preservatives like benzalkonium chloride (BAK) are toxic to the corneal epithelium, and a freshly operated eye is far more vulnerable to this damage. Common preservative-free options include brands based on sodium hyaluronate or carboxymethylcellulose. Your surgeon at Visual Aids Centre will recommend a specific formulation suited to your tear film profile. For a broader look at drop options, see best lubricating eye drops after LASIK.

Preserved Drops (After 4–6 Weeks)

Once your epithelium has fully stabilised, multi-dose bottles with gentle preservatives (like Purite or polyquad) are acceptable for convenience. However, if you’re using drops more than 4 times a day, stick with preservative-free—the cumulative preservative exposure at higher frequencies can still irritate.

Gel Drops and Ointments (Nighttime Use)

If you wake up with gritty, sticky eyes, a thicker gel drop or lubricating ointment applied at bedtime can help. These stay on the surface longer than standard drops and prevent the overnight drying that’s common in the first few months. You can learn more about managing morning symptoms at why you wake up with dry eyes after LASIK.

When Can You Stop Using Artificial Tears?

There’s no single “stop date” that applies to everyone. The right time to stop is when your eyes consistently feel comfortable throughout the day without drops, your vision remains clear and stable between applications, and your surgeon confirms healthy tear film metrics at a follow-up visit.

A common mistake is stopping abruptly because symptoms have improved. Instead, taper gradually—drop one application at a time over a week or two. If dryness returns, simply go back to the previous frequency for a while longer. Your eyes will tell you what they need. For patients whose dryness persists beyond expectations, treatments like targeted dry eye therapy after LASIK can make a significant difference.

Can You Overuse Artificial Tears After LASIK?

With preservative-free drops, there’s virtually no upper limit—you can use them as often as needed without harming the eye. The only practical downside is temporary blurring for a few seconds after each instillation.

Preserved drops are a different story. Using them more than 4–6 times per day exposes the corneal surface to cumulative preservative toxicity, which can paradoxically worsen dryness and irritation. If you find yourself reaching for drops constantly beyond the first month, bring this up with your surgeon—it may indicate an underlying tear film issue that drops alone won’t solve.

Beyond Drops: Other Ways to Support Tear Film Recovery

Artificial tears are the foundation, but they’re not the only tool. Omega-3 fatty acid supplements (fish oil or flaxseed oil) have been shown to improve tear quality by supporting the meibomian glands that produce the tear film’s lipid layer. Taking these starting two weeks before surgery and continuing for 3–6 months afterward gives the best results. Read more at omega-3 fish oil after LASIK.

Environmental adjustments help too: using a humidifier in dry indoor spaces, taking regular screen breaks using the 20-20-20 rule, wearing wraparound sunglasses outdoors to reduce wind exposure, and avoiding direct airflow from fans or car AC vents on your face. These simple habits often reduce the number of drops you need daily, speeding up the transition to drop-free comfort.