Most minor eye scratches heal within 24 to 48 hours. These injuries, called corneal abrasions, affect the thin outer layer of the cornea, which is one of the fastest-healing tissues in the body. Larger or deeper scratches can take several days to a week, and a small percentage of people develop a recurring condition that extends the timeline significantly.
What Happens When Your Cornea Heals
The cornea’s surface is only about five to seven cell layers thick, but it has a remarkably organized repair process. Healing happens in two main phases. First, within the initial hours after injury, cells at the edge of the scratch reorganize and begin sliding toward the damaged area. This migration phase doesn’t require new cells to grow. The existing cells flatten out and move across the wound like a sheet being pulled over a bed.
Once the scratch is covered, the second phase kicks in. Stem cells at the limbus (the border between the white of your eye and the cornea) ramp up their activity by eight to nine times the normal rate, producing new cells that migrate inward to restore the full thickness of the surface layer. Over the following days, these cells stack up and mature until the original multi-layered structure is rebuilt. This is why a scratch can feel dramatically better after one day but still need a few more days to fully strengthen.
Healing Timelines by Severity
A small scratch from a fingernail, eyelash, or dust particle typically feels significantly better within 24 to 48 hours and is fully healed within two to three days. You’ll notice the sharp pain fading first, followed by the gritty, foreign-body sensation over the next day or so.
Moderate scratches, such as those from a tree branch, paper edge, or contact lens mishap, generally take three to five days. These abrasions cover a larger area of the cornea, so the cell migration and rebuilding phases simply take longer to complete. Deeper scratches that extend closer to the cornea’s middle layers can take a week or more and carry a higher risk of leaving a faint scar that may or may not affect vision.
Contact lens-related scratches deserve special attention. Even after the abrasion itself heals, you should wait at least one week before wearing contacts again, and it’s worth having your optician check your lenses and fit before restarting.
What to Do Immediately After a Scratch
If something gets in your eye, your instinct will be to rub it. Don’t. Rubbing can deepen the scratch or push a particle further into the tissue. Instead, rinse your eye with clean water or saline solution. A small, clean glass held against the bone below your eye socket works if you don’t have an eyecup handy. If you’re at a worksite with an eye-rinse station, use it right away.
A useful trick for dislodging a particle: pull your upper eyelid down over your lower eyelid. This can trigger tearing that flushes the object out, and the lower lashes may sweep debris from under the upper lid. Avoid touching your eye with cotton swabs, tweezers, or anything else. If an object appears embedded in the eye or prevents you from closing it, leave it alone and get medical attention.
Remove contact lenses immediately and don’t put them back in while your eye is healing.
How Scratches Are Typically Treated
Most corneal abrasions don’t require aggressive treatment. Antibiotic eye drops are commonly prescribed to prevent infection while the surface is compromised, though this practice is based more on clinical experience and caution than on strong trial evidence. The American Academy of Ophthalmology specifically recommends antibiotic drops for contact lens-related scratches, since those carry a higher infection risk. The rate of corneal infection among contact lens wearers is roughly nine times higher than among non-wearers.
Lubricating drops help with comfort during healing, and your doctor may recommend over-the-counter pain relief for the first day or two. Eye patches were once standard but have largely fallen out of favor, as they don’t speed healing and can make it harder to tell if symptoms are worsening.
Signs a Scratch Isn’t Healing Normally
If your pain is getting worse rather than better after 24 hours, or if you notice increasing redness, sensitivity to light, or changes in your vision, the scratch may be deeper than expected or an infection could be developing. White or yellowish discharge is another warning sign. These symptoms warrant a prompt eye exam, because a corneal infection (ulcer) can progress quickly and threaten vision if untreated.
Recurrent Corneal Erosion
Some people heal from an initial scratch only to have the surface break open again weeks, months, or even years later, often upon waking. This condition, called recurrent corneal erosion, happens because the new surface cells didn’t anchor properly to the layer beneath them. Between 45% and 64% of recurrent erosion cases trace back to a prior physical injury to the eye.
Episodes typically start with sudden sharp pain, tearing, and light sensitivity, most commonly first thing in the morning when your eyelids pull at the loosely attached surface cells. The pattern can repeat multiple times. Treatment usually starts conservatively with lubricating ointments applied at bedtime to protect the surface overnight. If episodes continue, a procedure using a laser to smooth the corneal surface can help, though recurrence rates remain notable: roughly 25% of patients experience another episode within three months, and 36% within nine months.
If you had a corneal scratch that healed fully but you start waking up with sharp eye pain weeks or months later, recurrent erosion is the likely explanation. It’s treatable, but it does require follow-up care rather than just waiting it out.