A scratched eye typically looks red and watery, often with visible blood vessels on the white of the eye that weren’t noticeable before. The scratch itself, located on the cornea (the clear front surface of the eye), is usually too small to see with the naked eye. What you’ll notice instead are the secondary signs: redness, excessive tearing, swelling of the eye or eyelid, and sometimes a slight haze or blur when you try to focus.
Visible Signs of a Scratched Cornea
The most obvious sign is redness. Blood vessels on the surface of the eye dilate in response to the injury, giving the white of the eye a pink or bloodshot appearance. This can range from a few streaks of red to a uniformly irritated look, depending on the size and depth of the scratch.
Tearing is the other hallmark. A scratched eye produces a near-constant flow of tears as the eye tries to flush and protect the damaged area. The eye may also appear puffy, with mild swelling around the eyelid. In some cases, you’ll notice the person squinting or keeping the eye partially closed because light triggers a painful spasm in the pupil muscle, making bright environments uncomfortable.
The scratch itself sits on the cornea, which is only about half a millimeter thick. Superficial abrasions are essentially invisible without special equipment. Deeper or larger scratches can sometimes cause a faint cloudiness or haziness over the affected area, but most people won’t be able to spot the actual scratch by looking in a mirror.
How Doctors See the Scratch
If you visit a doctor, they’ll use a simple test to make the scratch visible. A yellow-orange dye called fluorescein is applied to the surface of your eye, usually with a small strip that touches the inside of your lower eyelid. The dye pools in any damaged areas of the cornea. When the doctor shines a blue light on your eye, the scratched area glows bright green, clearly outlining the shape and size of the abrasion. The rest of the healthy cornea stays dark. This test is painless and takes only a few seconds.
What It Feels Like
Appearance alone doesn’t always tell you much, so how it feels matters. The defining sensation is a gritty, foreign-body feeling, like there’s a piece of sand stuck under your eyelid even when nothing is there. This feeling tends to worsen with blinking because the eyelid drags across the damaged spot each time it moves.
Pain levels vary. A tiny scratch from a stray eyelash might cause mild irritation, while a larger abrasion from a fingernail or contact lens can produce sharp, constant pain. Vision may blur slightly on the affected side, and you’ll likely find yourself sensitive to light. Some people describe a burning or stinging sensation alongside the grittiness.
How It Differs From an Infection
A fresh scratch and an eye infection can look similar at first glance, since both cause redness and tearing. The key difference to watch for is a white or gray spot on the surface of your eye. This can signal a corneal ulcer, which is an open sore that develops when bacteria colonize a scratch. Corneal ulcers also tend to produce thick, yellowish discharge (pus) rather than the clear, watery tearing of a simple scratch. The pain with an ulcer is typically more severe and persistent.
These white spots aren’t always easy to see without medical equipment, so worsening pain or new discharge in the days after an eye injury is a more reliable warning sign than trying to spot the ulcer yourself. If symptoms aren’t improving after three days, the scratch may not be healing normally.
Healing Timeline
Most minor corneal scratches heal on their own within one to three days. You’ll typically feel noticeably better within 24 to 48 hours as the surface cells regenerate. The cornea has one of the fastest healing rates of any tissue in the body, which is why small abrasions resolve quickly without scarring.
A doctor may prescribe antibiotic eye drops or ointment, not to speed healing but to prevent infection while the surface is compromised. You’ll generally use these until you go a full day without any symptoms.
What Not to Do
If you suspect a scratched eye, there are a few things that can make it worse:
- Don’t rub your eye. This is the hardest instinct to resist, but rubbing can deepen the scratch or introduce bacteria.
- Don’t touch the eye with cotton swabs, tweezers, or tissues. These can catch on the damaged area and enlarge it.
- Don’t wear contact lenses until the eye has fully healed. Contacts sit directly on the cornea and trap bacteria against the wound.
- Don’t try to remove an embedded object. If something is stuck in the eye or prevents it from closing, that needs professional removal.
Rinsing the eye gently with clean water or saline is safe and can help wash out any loose debris. Blinking into a shallow container of clean water can also help dislodge particles sitting on the surface.