Scratched Eye
Why a tiny injury can hurt so much
General information from an emergency physician. It adds to your discharge papers and does not replace them or your own doctor. What this site is and isn’t
Key Takeaways:
- The clear front surface of the eye has more pain nerves than any other tissue. A tiny scratch can cause intense pain, tearing, and light sensitivity.
- Do not patch a simple corneal abrasion. A patch does not reduce pain or speed healing, and it reduces depth perception.
- Return now for worse vision, severe or worsening pain, a cloudy eye, or a white or gray spot on the clear surface.
About a Scratched Eye and the ED Workup
The cornea is the clear window at the front of the eye. An abrasion is a scratch in its thin outer layer. Common causes include a fingernail, branch, small object, or contact lens.
The cornea is the most densely nerve-supplied tissue in the body. Even a shallow scratch can expose many pain fibers. This can cause severe pain, tearing, light sensitivity, eyelid squeezing, and the feeling that something is still in the eye.
Cells at the edge of the scratch move inward and rebuild the surface. Most simple abrasions are much better within 48 to 72 hours and fully healed within about a week.
First Steps and Evidence-Based Home Care
Do not use an eye patch
Studies found that patching did not speed healing or reduce pain. People without a patch had slightly less pain. A patch also removes depth perception without a proven benefit. Current guidance recommends against patching a simple abrasion.
Protect the healing surface
A scratchy feeling can remain while the surface heals. Most simple abrasions improve greatly within 48 to 72 hours. Pain that stays the same or worsens at 24 hours needs a recheck.
Keep contact lenses out until the eye is fully healed, symptoms are gone, and any prescribed antibiotic course is complete. Contact-lens injuries have a higher risk of serious infection and need closer follow-up.
Use only the eye drops listed in your discharge plan. Do not use leftover drops. Contact-lens injuries need different germ coverage than many other abrasions. Repeated use of take-home numbing drops can poison the cornea, delay healing, and threaten vision.
Timeline and Expected Recovery Course
Most simple abrasions improve a lot within two to three days and heal within about a week. Pain that stays the same or worsens at 24 hours needs a recheck.
Sharp pain, tearing, and a scratchy feeling can return weeks or months later, often when the eye first opens after sleep. This can be recurrent corneal erosion, especially after a fingernail or plant-material injury. It needs evaluation if it happens.
Emergency Red Flags: Return Immediately
Return to the emergency department for any of these:
- New or worse vision loss, severe pain, or a cloudy-looking eye.
- A white or gray spot on the clear part of the eye.
- Visible pus layered in the front of the eye.
- Concern that an object went deeper than the surface.
- Pain or other symptoms that are the same or worse after 24 hours.
- A metal injury with a remaining rust ring, especially near the center of vision.
- Any worsening after a contact-lens injury.
This list does not cover everything. If vision changes or the eye is rapidly worsening, return to the emergency department.
Reviewed September 3, 2026