What to Do If You Scratched Your Eye: First Aid

A scratched eye, known medically as a corneal abrasion, calls for a few simple first-aid steps: rinse the eye gently with clean water or saline, blink several times to encourage tears, and avoid rubbing. Most small scratches heal on their own within a day or two, but even minor ones can be intensely painful because the cornea is packed with more nerve endings than almost any other tissue in your body. Knowing what to do in the first few minutes, and what to avoid, can make the difference between a quick recovery and a lingering problem.

Why a Scratched Cornea Hurts So Much

The cornea is the clear dome covering the front of your eye. It is the most densely innervated tissue in the human body, supplied mainly by a branch of the trigeminal nerve that also serves parts of your face and forehead.¹ Those nerve endings normally do useful work: they monitor the tear film and trigger blinking to keep the surface moist and protected. When a scratch tears through the thin outer layer of cells, it exposes those nerves directly. The result is sharp, burning pain that can feel wildly out of proportion to the size of the injury. Tearing, light sensitivity, and a gritty “something is stuck in my eye” sensation are all typical.

Immediate First-Aid Steps

The moment you suspect you’ve scratched your eye, resist the urge to rub it. Rubbing can push a foreign particle deeper into the tissue or widen the scratch. Instead, follow these steps:

• Blink gently: Repeated blinking encourages tears to flush out small particles like dust or sand. If the particle is loose, tears alone may wash it out.
• Rinse with clean water or saline: Tilt your head so the injured eye is down, and let water or saline flow across the surface. You can also fill a clean cup and press it against your eye socket to create a makeshift eye bath. Avoid tap water at high pressure.
• Pull the upper lid over the lower lid: This can help dislodge a particle caught under the upper eyelid. The lower lashes act as a gentle brush against the underside of the upper lid.
• Wear sunglasses: Light sensitivity is common, and dimming the light reduces pain while you wait to see a doctor.

If you can see an object embedded in the eye, or if the scratch was caused by metal, wood, or anything that might have penetrated the surface, do not try to remove it yourself. Cover the eye loosely without applying pressure, and get to an emergency room.

What Not to Do

Some instinctive reactions to eye pain are the worst things you can do. Rubbing tops the list, but a few other common mistakes deserve mention.

Do not use cotton swabs, tissues, or tweezers to try to remove a particle from the surface of the eye. These can create new scratches or push debris in further. Do not rinse the eye with anything other than clean water or sterile saline. Hydrogen peroxide, contact lens cleaning solution, or alcohol-based products will damage the corneal surface.

You might also be tempted to reach for over-the-counter redness-reducing eye drops. These drops constrict blood vessels and do nothing to help a scratch heal. They can mask warning signs of a more serious injury. Preservative-free artificial tears are a better choice if your eye feels dry while you wait to see a professional.

Skip the Eye Patch

For decades, doctors routinely taped a pressure patch over a scratched eye to keep the lid closed, reasoning that immobilizing the surface would speed healing. That practice has fallen out of favor. A Cochrane review of multiple trials found that people who wore a patch were actually slightly less likely to have healed at the 24-hour mark compared to those who went without one, and by 48 to 72 hours the groups were essentially the same.² A separate controlled trial comparing patching to simple antibiotic ointment found no benefit to the patch, with roughly equal healing rates at one, two, and three days.³

Patching also comes with practical downsides. It eliminates depth perception, makes driving unsafe, and creates a warm, moist environment under the pad that could encourage bacterial growth. Unless a doctor specifically instructs you to patch your eye for an unusual reason, leave it uncovered.

When to See a Doctor

Any scratch that doesn’t feel substantially better within a few hours, or one that worsens, warrants a visit to an eye care professional or urgent care clinic. You should seek care right away if:

• Your vision is blurry: A scratch limited to the outer layer of the cornea rarely causes lasting vision changes, but blurred sight could signal a deeper injury.
• Pain is severe or worsening: Escalating pain after the initial injury can indicate infection or a foreign body still lodged in the eye.
• The injury involved metal or high-speed debris: Metal fragments can rust on the cornea within hours, and high-velocity particles may penetrate deeper than you think.
• You wear contact lenses: Contact lens wearers face a higher risk of infection from bacteria that thrive under lenses, and a scratch while wearing a lens needs professional assessment.
• There is visible discharge or increasing redness: These are signs of infection, which can progress quickly on a damaged cornea.

At the clinic, the doctor will likely place a drop of fluorescein dye in your eye. This yellow-orange dye glows green under a blue light and pools in any area where the surface cells are missing, outlining the exact shape and size of the scratch. The exam is painless and quick.

How Doctors Treat a Corneal Abrasion

For most uncomplicated scratches, treatment is straightforward: a short course of antibiotic eye drops or ointment to prevent infection, and pain management. Interestingly, the evidence for prophylactic antibiotics is not as strong as you might expect. A Cochrane systematic review concluded that the available evidence was too weak to confirm that antibiotics prevent infection or speed healing after a corneal abrasion, and no particular antibiotic regimen stood out as better than another.⁴ Despite this, most clinicians still prescribe them as a precaution, reasoning that the stakes of a corneal infection are high enough to justify the low cost and minimal side effects of a few days of drops.

One thing your doctor will almost certainly not send you home with is a bottle of anesthetic eye drops, despite the dramatic relief those drops provide during the office exam. Topical anesthetics can be toxic to the corneal surface when used repeatedly, and prolonged use has been linked to deep corneal damage, ulceration, and even perforation of the eye.⁵ They also numb the protective reflexes that keep you from accidentally causing more damage, so they are strictly for in-office diagnostic use.

Managing Pain at Home

Pain from a corneal scratch tends to peak in the first several hours and then gradually eases as the surface begins to repair. Over-the-counter oral pain relievers like ibuprofen or acetaminophen are reasonable options. Ibuprofen has the added benefit of reducing inflammation.

For more significant scratches, doctors may prescribe topical NSAID eye drops. A study comparing ketorolac tromethamine drops to a placebo vehicle found that patients using the NSAID drops reported significantly less pain, less light sensitivity, and less foreign-body sensation the day after injury, and they returned to normal activities sooner.⁶ Healing times were the same in both groups, so the drops helped with comfort without interfering with recovery. Keeping lights dim or wearing sunglasses during the first day or two also helps, since dilated pupils let in more light and that stimulates pain in an already-irritated cornea.

How Fast the Cornea Heals

The cornea heals remarkably quickly compared to most tissues. Small scratches often close within 24 to 48 hours. Larger abrasions may take three to five days. Laboratory studies of corneal cells show that wound closure involves both the migration of neighboring cells sliding over to cover the gap and the proliferation of new cells to fill in behind them.⁷ Inflammatory signals at the wound site help coordinate this process and can speed it up.

That speed comes with a caveat. The initial closure of the surface does not mean the repair is complete. For several weeks after a scratch, the new cells are not as firmly anchored to the underlying layer as the old ones were. During this period the healed area is vulnerable, especially first thing in the morning when the eyelids can stick to the delicate new cells and pull them off upon opening. Using lubricating drops or ointment at bedtime for a few weeks after a significant scratch can reduce this risk.

Recurrent Corneal Erosion

When the new surface cells fail to anchor properly, a frustrating condition called recurrent corneal erosion can develop. It typically presents as sudden, sharp pain in one eye upon waking, often weeks or months after the original scratch seemed to have healed completely.⁸ The eyelid, slightly dried during sleep, sticks to the weakly attached surface cells and rips them off when you open your eyes. The result is essentially a fresh abrasion without a new injury.

A study of patients with recurrent erosion found that prior trauma was the most common trigger, accounting for about 43% of cases, while diabetes was present in roughly 38% of patients and was associated with much longer recovery times.⁹ The average gap between the original trauma and the first recurrence was about five months, which is why many people do not connect the two events.

Conservative treatment starts with aggressive lubrication: preservative-free artificial tears during the day and a thicker lubricating ointment at night. Hypertonic saline drops or ointment, which draw water out of swollen surface cells and help them adhere, are often added once the acute episode settles.⁸ For patients who keep having episodes despite these measures, there are procedural options. A Cochrane review noted that no single treatment has been firmly established as superior, and the choice among options like anterior stromal puncture or phototherapeutic keratectomy depends on the individual case.¹⁰

Contact Lens Wearers and Infection Risk

If you scratch your eye while wearing a contact lens, or if you’ve been wearing contacts over a scratch you didn’t know you had, the situation is more urgent. Contact lenses can trap bacteria against the damaged cornea, and certain organisms thrive in that environment. Bacterial keratitis, a corneal infection, can progress rapidly and threaten vision if not treated early with appropriate antibiotic drops.

Remove the contact lens immediately if it is still in. Do not put the lens back in until you’ve been cleared by a doctor. Even after a simple scratch heals, wearing contacts too soon can re-injure the fragile new surface. Most clinicians recommend waiting at least a few days after symptoms resolve before resuming lens wear, and longer for larger abrasions. If you notice increasing pain, worsening redness, or any discharge after a scratch while wearing contacts, get seen the same day.

Scratched Eyes in Babies

Infants cannot tell you their eye hurts, which makes corneal abrasions easy to miss. A study of fussy infants under about three months old found that nearly half of them had a corneal abrasion, and the length of time they had been crying was not significantly different between babies with and without scratches.¹¹ Babies scratch themselves with their own fingernails, and the study found no clear link between nail length or trimming method and abrasion rates.

If a baby is crying inconsolably and you cannot find an obvious cause, a scratched eye is worth considering, especially if you notice tearing or the baby keeping one eye squeezed shut. A pediatrician or emergency physician can check for a scratch with a simple fluorescein exam. Treatment is the same as for adults: a short course of antibiotic drops and time.

Do You Need a Tetanus Shot

This comes up surprisingly often, usually when the scratch was caused by a dirty fingernail, a tree branch, or a rusty piece of metal. A study examining tetanus prophylaxis after eye injuries found that routine tetanus vaccination is not needed for uncomplicated corneal abrasions or other non-penetrating eye injuries.¹² The recommendation changes for perforating injuries, where the object actually punctures through the cornea into the inside of the eye. In that case, tetanus prophylaxis is supported. For a surface scratch, though, you can skip the shot.

Preventing Scratches in the First Place

Many corneal scratches happen during everyday activities where eye protection never crosses your mind. Yard work sends small twigs and debris flying. Home renovation projects produce metal shavings and drywall dust. Playing with pets or small children brings sharp little nails into contact with your face. A few habits reduce your risk considerably:

• Wear safety glasses: Polycarbonate lenses resist impact and wrap around the sides. Keep a pair near your workbench and in your garden supplies.
• Use sport-specific eye protection: Racquet sports, paintball, and basketball are common culprits for eye injuries. Sport goggles designed for each activity exist and are far cheaper than an emergency room visit.
• Trim babies’ nails regularly: Infants flail their hands near their faces constantly. Keep nails short and smooth-edged, even if the evidence linking nail length to scratch rates is weak.
• Handle contact lenses carefully: Wash your hands before inserting or removing lenses. Replace them on schedule. Never sleep in lenses not designed for overnight wear.

Wind and dry air also contribute. If you ride a motorcycle, ski, or spend long hours in air-conditioned or heated environments, your tear film can thin out, leaving the cornea more exposed to minor irritants. Wraparound sunglasses or moisture-chamber glasses help in these situations, and regular use of preservative-free artificial tears keeps the surface lubricated and resilient.