How Long Does a Scratched Cornea Take to Heal?

Someone with a freshly scratched eye is usually in real discomfort and wants to know how long they will have to endure it, whether they can drive or work, and when they can wear their contacts again. Behind the question is often a worry that the scratch could leave lasting damage or that something is wrong if it has not felt better as fast as they expected.

The healing speed depends on the eye's outer layer. The cornea's surface is a thin, fast-growing skin called the epithelium. When it is scraped away, surrounding cells quickly slide over and multiply to cover the gap, which is why a shallow scratch can close in a day or two. Because this layer is full of nerves, the eye hurts and waters until the surface is intact again, then the pain fades.

Deeper injuries that reach below the epithelium heal more slowly and, if they involve the layer beneath (the stroma), can leave a small scar. A scar in the center of the cornea may blur vision permanently, while one off to the side often causes no visual trouble. The most important factor in how quickly and cleanly a scratch heals is keeping it free of infection.

The cornea is one of the fastest-healing surfaces in the body because its epithelial cells regenerate rapidly and it has no blood vessels to slow things down. A clean abrasion the size of a pinhead or two typically closes within a day; a larger sweep of missing surface may take three to five days. Once the surface has resurfaced, the eye often stays a little gritty or light-sensitive for a week or so as the new skin matures and reattaches firmly.

Several things slow healing. Diabetes, dry eye, and certain medications can delay resurfacing. Contact lens use raises the infection risk, so lenses stay out until the eye is fully healed. A scratch caused by a fingernail or paper cut can lead to recurrent corneal erosion, where the healed area repeatedly breaks down and causes sharp pain, often on first waking, for weeks to months. If an abrasion becomes infected, healing not only stalls but reverses, and an ulcer can form that leaves a scar.

Timelines are reassuring only when things are improving. Seek prompt care if:

• Pain, redness, or light sensitivity is getting worse rather than better after the first day.
• Vision is blurring or a white or cloudy spot appears on the cornea.
• There is discharge or pus, or the lids are stuck shut with mucus.
• You wear contact lenses and have a painful red eye.
• The scratch has not felt substantially better within a few days.

Any of these can signal infection, which is time-sensitive and can threaten vision if untreated.

To judge healing, the doctor measures your vision and examines the cornea at the slit lamp with fluorescein dye, which stains any remaining raw surface green under blue light. Comparing the stained area to a previous visit shows whether the abrasion is closing on schedule. The doctor also looks for signs that it is not just a simple scratch, such as a white infiltrate suggesting infection, a foreign body under the lid, or loose epithelium that flags a tendency toward recurrent erosion. Follow-up in a day or two is common for larger abrasions to confirm they are resurfacing properly.

Care supports the natural healing process. Lubricating ointment or drops keep the surface moist so cells can migrate, and antibiotic drops or ointment reduce the risk of infection during healing. Discomfort is managed with cool compresses, oral pain relievers, and sometimes a drop that eases the deep ache by relaxing the eye's focusing muscle. Contact lenses are paused until healing is complete. Larger or slow-to-heal abrasions may be rechecked, and in select cases a bandage soft contact lens is placed by the doctor to protect the surface and improve comfort. If recurrent erosions develop, longer-term measures such as nightly lubricating ointment or in-office procedures may be needed.

• Do not rub the eye, which can strip off newly healed surface and restart the clock.
• Do not restart contact lenses until an eye doctor confirms the cornea is fully healed.
• Do not use numbing anesthetic drops to get through the pain; they are toxic to the cornea and slow healing.
• Do not assume slow or worsening healing is normal; a scratch that is not improving needs to be re-examined.
• Do not use leftover steroid drops on your own, since they can delay healing and mask infection.

Call May Eye Care Center for a prompt visit if a scratched eye is not steadily improving within a couple of days, if pain or blurring is worsening, or if you wear contacts and have a painful red eye. Patients near Hanover can be evaluated the same day for these injuries. Treat a chemical splash or a penetrating injury as an emergency and seek immediate care.

A simple scratched cornea usually heals within one to three days, with pain easing each day. If the eye is getting worse instead of better, or you wear contacts, have it examined promptly rather than waiting.