When Should an Eye Injury Go to the Emergency Room?

After a knock, a splash, or something flying into the eye, people are caught between not wanting to overreact and being terrified of losing their sight. They want a clear line: which injuries can wait for a regular appointment and which mean heading to the emergency room right now.

The eye is a fluid-filled sphere whose delicate structures, the cornea, iris, lens, and retina, do not tolerate a breach or a sudden pressure change. Some injuries stay on the surface, like a scratch or a loose particle, and heal on their own. Others involve the inside of the eye: bleeding in the anterior chamber, a torn retina, a ruptured eyeball, or a chemical burning through the surface.

Timing matters because several of these problems are treatable if caught quickly and cause permanent loss if they are not. A retinal detachment repaired early can preserve vision; the same detachment left for days may not. The visible severity of an injury does not always match the danger inside, which is why the warning signs, not how bad the bruise looks, guide the decision.

Injuries fall into categories that map to urgency. Chemical burns are true emergencies handled by immediate irrigation, then care. Open-globe injuries, where the eye wall is cut or ruptured, are surgical emergencies; signs include a teardrop-shaped pupil, fluid or dark tissue leaking from the eye, and a severe drop in vision. Intraocular foreign bodies, typically from grinding or hammering metal, may cause little pain yet require imaging and removal.

Blunt trauma, a fist, ball, airbag, or fall, can cause a hyphema (blood in the front chamber), a spike in eye pressure, an orbital fracture, or a retinal tear or detachment. Warning signs include worsening pain, a shadow or curtain in the vision, or new flashes and floaters. Double vision or an eye that cannot move fully can indicate an orbital fracture trapping a muscle. Each of these is a same-day evaluation, and several are ER-level.

Go to an emergency room or call for immediate eye care if, after any injury, you have:

• A chemical splash (rinse for 15 to 20 minutes first), or any object that penetrated or is stuck in the eye.
• Sudden or worsening loss of vision, or new double vision.
• Severe eye pain that does not settle.
• Blood visible inside the colored part of the eye, or a visible cut in the eyeball.
• A new curtain, shadow, shower of floaters, or flashes of light.
• A pupil that is a new shape, or newly larger or smaller than the other.

The doctor takes a precise history, what struck the eye, at what speed, and whether metal, glass, or chemicals were involved, because that predicts the injuries to look for. Vision and pupils are checked, then the front of the eye is examined at the slit-lamp for a hyphema, a corneal cut, or a shallow chamber suggesting a ruptured globe. If the globe may be open, the exam is gentle and a shield is placed rather than pressing on the eye. The eye is dilated to inspect the lens and retina for tears or detachment, eye pressure is measured when safe, and CT imaging is ordered when a fracture or a metal foreign body is possible.

Care is matched to the injury. A chemical burn is irrigated until neutral and treated medically. A corneal abrasion gets antibiotic drops and heals in days. A hyphema is managed with rest, a shield, and close monitoring of eye pressure. An open-globe injury is repaired surgically with antibiotics and tetanus coverage. A retinal tear is sealed with laser, and a detachment is repaired surgically. An orbital fracture that traps a muscle may need surgery. The common thread is that the right treatment depends on an exam, so the priority after protecting the eye is getting to that exam quickly.

• Do not press on, patch, or rub an eye that may be cut or ruptured; shield it lightly and go.
• Do not try to remove an object that has penetrated or is embedded in the eye.
• Do not delay care for a chemical splash to figure out what it was, rinse and go.
• Do not eat or drink if the injury may need surgery, in case anesthesia is required soon.
• Do not let a pain-free eye lull you into waiting; judge by the event and the warning signs.

For a clearly minor injury, such as a speck that rinsed out and left the eye comfortable, call May Eye Care Center for a routine visit. For any of the warning signs above, a chemical splash, a penetrating or high-speed injury, sudden vision loss, blood in the eye, or a changed pupil, go to the nearest emergency room right away. Patients around Hanover can call the office on the way so the team knows to expect an urgent injury.

Chemical splashes, penetrating or high-speed injuries, sudden vision loss, severe pain, blood in the eye, or a changed pupil all mean the emergency room now. When you are unsure, that is itself a reason to be seen the same day.