Most people need artificial tears for at least 3 to 6 months after LASIK, with many surgeons recommending continued use for up to a full year. The first few weeks require the most frequent application, sometimes as often as once per hour, then the schedule tapers gradually as your eyes heal. Your individual timeline depends on how quickly your corneal nerves recover and whether you had dry eye tendencies before surgery.
Why LASIK Causes Dry Eyes
During LASIK, the laser cuts through a dense network of nerves in your cornea to create the flap. These nerves do more than detect pain. They trigger your natural tear reflex and release compounds that keep the corneal surface healthy. When those nerves are severed, your eyes temporarily lose the signal to produce tears at the right rate, and the tear film that normally coats your eye becomes unstable.
Nerve regeneration starts at the edges of the flap and slowly works inward toward the center of the cornea. Intense nerve disruption typically lasts about three months, but full recovery takes much longer. Studies using microscopic imaging show that the nerve density beneath the corneal surface remains significantly reduced even five years after LASIK and may never fully return to pre-surgery levels. This is why dry eye symptoms can linger well beyond the point where your vision has stabilized, and why consistent artificial tear use matters for protecting your corneal surface during that extended healing window.
A Typical Drop Schedule
Protocols vary between surgeons, but the general pattern follows a steady taper from aggressive hydration in the first days to maintenance doses over several months. Walter Reed National Military Medical Center publishes one of the more detailed schedules:
- First 24 hours: One drop every hour during waking hours, at minimum.
- First week: Continue at roughly once per hour.
- First month: About 8 times per day.
- Months 2 and 3: About 6 times per day.
- Months 3 through 6: About 4 times per day.
- Months 6 through 12: Twice per day.
A multicenter clinical trial used a similar early approach: one or two drops every hour while awake for the first two days, then at least every two hours through day 10. After that, investigators adjusted the frequency at day 10, 30, and 60 visits based on each patient’s signs and symptoms, ranging anywhere from every two hours down to once or twice a day.
The key takeaway is that this isn’t a set-it-and-forget-it situation. Your surgeon will adjust the schedule at follow-up visits based on how your eyes look and feel. Don’t taper faster than instructed just because your eyes feel fine. Dryness can be present without obvious symptoms, and consistent lubrication supports the healing surface.
Preservative-Free Drops Matter Early On
For at least the first several months, preservative-free artificial tears are strongly preferred. Preservatives in multi-dose bottles (the ones with a standard screw cap that last for weeks) can irritate a healing cornea, especially when you’re applying drops many times a day. Single-use vials eliminate that risk. Carboxymethylcellulose 0.5% is a common formulation prescribed after LASIK, though your surgeon may recommend a specific brand.
Once your drop frequency decreases to a few times daily and your cornea has had several months to heal, switching to a preserved multi-dose bottle becomes more practical. At that point the preservative exposure per day is low enough that most people tolerate it without issues.
Nighttime Lubrication
Liquid drops evaporate relatively quickly, which makes them less effective while you sleep. Thicker gel drops or ointments coat the eye longer and are better suited for overnight use. The American Academy of Ophthalmology recommends reserving gels and ointments for bedtime, since they temporarily blur vision. Apply about a quarter inch of ointment inside your lower lid as the last thing you do before closing your eyes. During the day, stick with liquid drops for clear vision.
Factors That Extend Your Timeline
Not everyone heals on the same schedule. Several factors can mean you’ll rely on artificial tears longer than the typical 6 to 12 months.
Pre-existing dry eye is the single biggest predictor. If your eyes were already on the dry side before surgery, the nerve disruption from LASIK amplifies the problem significantly. This is why thorough screening before LASIK matters so much. The type of LASIK also plays a role: procedures using an older microkeratome blade to create the flap cause more dry eye than those using a femtosecond laser, which is now the standard at most practices. SMILE, a newer procedure that skips the flap entirely, shows faster nerve recovery than traditional LASIK, with meaningful nerve regrowth visible within the first month.
Other factors that can slow your tear film recovery include contact lens wear before surgery (which may have already reduced corneal sensitivity), certain medications like antihistamines or antidepressants that reduce tear production, and dry environments like air-conditioned offices or arid climates. If any of these apply to you, plan for a longer course of artificial tears and mention them to your surgeon.
When Artificial Tears Aren’t Enough
For the vast majority of LASIK patients, artificial tears are all that’s needed. One study tracking 123 LASIK eyes found that chronic dry eye, defined as persistent symptoms at six or twelve months plus at least one other symptomatic visit, occurred in less than 1% of cases. That’s reassuring, but it means a small number of people do develop dryness that outlasts standard treatment.
If you’re still experiencing significant burning, irritation, foreign body sensation, or fluctuating vision despite consistent artificial tear use after several months, your surgeon has additional options. Tiny plugs can be placed in your tear drainage channels to keep tears on the eye surface longer. Prescription anti-inflammatory drops can address underlying inflammation that disrupts tear production. These interventions are typically reserved for cases where preservative-free tears at regular intervals aren’t providing adequate relief.
The Practical Bottom Line
Plan to buy artificial tears in bulk. Most people use them heavily for the first one to three months and then gradually reduce over the following three to nine months. A reasonable expectation is 6 to 12 months of regular use, with the frequency dropping from hourly to just a couple of times per day by the end of that period. Some people stop needing them entirely after a year. Others find that a drop or two per day remains part of their routine indefinitely, particularly in dry or screen-heavy environments. Keep a stash at your desk, in your bag, and on your nightstand so you’re never caught without them during the months when they matter most.