Why LASIK Causes Dry Eye
During LASIK, a thin flap is created in the cornea to reshape the tissue underneath. That flap-creation step temporarily cuts through some of the corneal nerves responsible for two things: sensation, and triggering your normal blink and tear-production reflex. With those nerves temporarily disrupted, your eyes may produce fewer tears and blink less often than they did before, even though nothing is "wrong" in the way it might feel.
How Common Is It, and How Long Does It Last?
Post-LASIK dry eye is extremely common in the first few weeks, and many patients notice some degree of it. For most people, symptoms peak in the first month and gradually improve as the corneal nerves heal, typically resolving within 3 to 6 months. A smaller number of patients experience symptoms that persist longer, especially those who had dry eye tendencies before surgery that went unnoticed.
What It Feels Like
Gritty, sandy, or scratchy sensation
Eyes that feel tired or strained
Fluctuating or blurry vision
Light sensitivity
Occasional excessive watering
What Helps During Recovery
Used consistently rather than only when symptoms flare.
Which help retain your eye's own natural tears for a period of time.
For cases where inflammation is prolonging the dryness.
Healthy oil glands in the eyelids are a major part of a stable tear film.
When to Ask for a Closer Look
If dryness is still significantly affecting your daily comfort or vision beyond the 3 to 6 month mark, or if it feels like it's getting worse rather than better, that's a reasonable point to ask for a more structured evaluation rather than continuing to manage it on your own. A framework-based assessment, the kind aligned with the TFOS DEWS III diagnostic approach, can help identify exactly which factors are contributing, rather than treating "dry eye" as one single thing.
A structured next step
Connect with a CSI-powered clinic for an assessment built around your symptoms, history, and tear-film health.
Find a CSI clinic near me