A scratched cornea is one of the most painful eye injuries there is — and one of the most common. The cornea is the clear dome-shaped surface at the front of your eye, and it contains more nerve endings per square
millimeter than almost any other tissue in the body. When it gets scratched, you know about it immediately.
The good news is that most corneal abrasions heal quickly with proper care. The key is knowing what to do — and what not to do — in the first hours after it happens.
What Is a Corneal Abrasion?
A corneal abrasion is a scratch or scrape on the surface of the cornea. The cornea has several layers, and an abrasion affects the outermost layer — the epithelium. Think of it like a scrape on your skin: it’s not a cut all the way through, but it’s still painful and needs to heal properly to avoid complications.
Because the cornea is so rich in nerve endings, even a small abrasion can cause significant pain, tearing, and sensitivity to light. The discomfort is often disproportionate to the size of the injury — a tiny scratch can feel like something much larger.
Common Causes
Corneal abrasions happen in all kinds of everyday situations. Common causes include:
- A fingernail, tree branch, or piece of paper catching the eye
- Rubbing your eye too vigorously, especially if there’s a foreign particle present
- A foreign object in the eye — dirt, dust, sand, metal shavings, or wood particles
- Contact lens wear — putting in, removing, or wearing a damaged or inside-out lens
- Poorly fitting or dry contact lenses that move across the corneal surface
- Sports injuries or workplace accidents
- Children and pets — small fingers and paws are a surprisingly frequent culprit
- Desert dust and debris during Arizona’s haboob season
Symptoms to Recognize
A corneal abrasion usually makes itself known right away. Symptoms include:
- Sudden, sharp eye pain — often described as a burning or stinging sensation
- The persistent feeling that something is in your eye, even after rinsing
- Excessive tearing
- Light sensitivity (photophobia)
- Redness of the eye
- Blurred or hazy vision
- Involuntary blinking or difficulty keeping the eye open
- Headache from eye strain and squinting
Symptoms can range from mild to severe depending on the size and location of the abrasion. Scratches in the center of the cornea, directly in the line of vision, tend to be more painful and can temporarily affect visual clarity more significantly.
What to Do Right Away
If you think you have a corneal abrasion, here’s what to do in the immediate aftermath:
Rinse your eye gently. Use clean, lukewarm water or sterile saline solution to flush the eye. This can help remove any foreign particles that may still be present. Tilt your head with the affected eye down and let water run across the surface.
Blink several times. Blinking can help your natural tears flush out small particles. Try not to keep the eye clamped shut, which can actually trap particles against the corneal surface.
Remove contact lenses. If you’re wearing contacts, take them out immediately. Do not put them back in until your eye has fully healed and your eye doctor has cleared you.
Call your eye doctor. Most corneal abrasions should be evaluated by an eye care professional, especially if symptoms are more than very mild. Valley Eyecare Center can often accommodate same-day or urgent visits for eye injuries.
What NOT to Do
A few common instincts can actually make things worse:
- Don’t rub your eye — this is probably the most important one. Rubbing can deepen the scratch and introduce bacteria.
- Don’t try to remove a visible foreign object yourself if it’s embedded in the eye — this requires professional care.
- Don’t wear contact lenses over an abrasion — it increases infection risk significantly.
- Don’t use tap water if you can avoid it — sterile saline or an eyewash station is preferable.
- Don’t patch the eye on your own — eye patching has largely fallen out of favor and can actually slow healing in many cases.
- Don’t ignore it — even small corneal abrasions can develop into serious infections if left untreated.
How Corneal Abrasions Are Treated
At your appointment, your eye doctor will use a slit lamp — a specialized microscope — and often a fluorescent dye to visualize the abrasion and assess its size and location. Treatment typically includes:
- Antibiotic eye drops or ointment to prevent infection
- Lubricating eye drops to keep the surface moist and comfortable during healing
- Prescription pain relief drops for more severe abrasions
- Instructions to avoid contact lenses until the cornea has fully healed
- A follow-up appointment to confirm healing is progressing properly
Most minor abrasions heal within 24 to 72 hours. Larger or deeper abrasions may take longer and require closer monitoring to ensure no scarring or infection develops.
When to Seek Urgent Care
Go to your eye doctor or an urgent care facility right away if:
- Pain is severe or worsening
- You have significant vision changes or sudden vision loss
- You can see a visible object embedded in the eye
- Symptoms aren’t improving after 24 hours
- The injury involved a high-speed particle (metal, glass, or debris from power tools) — these can penetrate deeper than a surface abrasion
- You develop fever, increasing redness, or discharge, which may signal infection
High-velocity eye injuries — anything involving power tools, grinding metal, or projectiles — should always be evaluated as an emergency, even if symptoms seem mild at first. Penetrating injuries can be deceptively subtle initially.
Frequently Asked Questions
Q: How long does a corneal abrasion take to heal?
A: Most minor corneal abrasions heal within one to three days with proper care. Larger abrasions may take up to a week. The corneal epithelium is one of the fastest-healing tissues in the body, which is why most patients recover quickly — but a follow-up exam is still important to confirm complete healing.
Q: Can a corneal abrasion cause permanent damage?
A: Minor abrasions that heal cleanly typically leave no lasting damage. Larger or deeper abrasions, especially those that become infected or are slow to heal, can occasionally result in corneal scarring that affects vision. This is why proper treatment and follow-up matter even for seemingly small injuries.
Q: Can contact lenses cause corneal abrasions?
A: Yes — contact lens-related abrasions are common. They can result from inserting or removing lenses improperly, wearing a damaged lens, sleeping in lenses not approved for overnight wear, or wearing lenses in dry or dusty conditions (like Phoenix’s outdoor environment). Good lens hygiene and wearing only within recommended schedules significantly reduce this risk.
Q: Should I go to the ER for a corneal abrasion?
A: For most corneal abrasions, your optometrist is the right first call — we’re equipped to diagnose and treat the injury in our office and can often see you same day. The ER is appropriate if your eye doctor isn’t available, if you have a penetrating eye injury, or if symptoms are severe and worsening rapidly.
Hurt Your Eye? Call Valley Eyecare Center
Eye injuries don’t wait for a convenient time, and neither should you. If you think you have a corneal abrasion or any other eye injury, Valley Eyecare Center is here to help. We see urgent eye care needs and can evaluate and treat corneal abrasions the same day.
We have two convenient Phoenix locations:
- Northern Ave: 602-242-6888
- 44th Street: 602-955-2700
Or visit valleyeyecareaz.com to request an appointment online.
