Using an eyewash station correctly means getting to it fast, activating it with one motion, and flushing your eyes for at least 15 minutes with both hands free to hold your eyelids open. The process sounds simple, but the details matter: flushing too briefly or at the wrong angle can leave chemicals in contact with your cornea long enough to cause permanent damage.
How to Activate the Station
Eyewash stations are designed to be operated with one push or pull, even if you can barely see. Most plumbed units have a paddle or lever you push down or pull toward you. This single motion opens the water valve and pops the dust covers off both nozzles simultaneously. Once activated, the valve stays open on its own so your hands are completely free.
As soon as water is flowing, lean your face into the stream. The nozzles are angled to send two gentle arcs of water upward into both eyes at once. Hold your eyelids open with your fingers and roll your eyes around so the water reaches every surface, including under the upper and lower lids. This is the part people instinctively resist because the water hitting an irritated eye feels uncomfortable, but keeping your lids forced open is critical.
How Long to Flush
The flushing time depends entirely on what got into your eye. For a loose particle like dust or a wood chip, about a minute of irrigation is usually enough to wash the debris out. For chemical exposures, the minimum is 15 minutes of continuous flushing, and 30 minutes is better for strong acids or alkalis like drain cleaner, oven cleaner, or industrial solvents.
Alkali chemicals are especially dangerous because they dissolve into fatty tissue and penetrate the eye far more rapidly than acids. Once an alkaline substance reaches the deeper layers of the cornea, it triggers a chain reaction: cells break down, the body releases enzymes to fight the damage, and those enzymes cause even more destruction. Continuous flushing works by physically diluting and washing away the chemical before it can penetrate further, gradually bringing the eye’s pH back toward normal levels. In severe burns, restoring a normal pH can require enormous volumes of fluid, sometimes 20 liters or more in a clinical setting.
This is why cutting your flush short is risky. Even if the burning sensation fades after a few minutes, the chemical may still be reacting with tissue. Stay at the station for the full duration.
Water Temperature and Flow Rate
Safety standards require eyewash water to be tepid, between 60°F and 100°F (16°C to 38°C). Water that’s too cold causes people to pull away before the flush is complete. Water that’s too hot can worsen tissue damage. If you activate a station and the water feels extremely cold or hot, keep flushing anyway. Imperfect water temperature is far less dangerous than leaving a chemical in your eye.
A compliant eyewash station delivers at least 0.4 gallons per minute and is required to sustain that flow for a full 15 minutes. That’s a gentle, steady stream, not a fire hose. If the flow seems weak or sputters out, the station may not have been maintained properly. Workplace stations should be flushed weekly to keep the water supply clean and verify they’re working.
What to Do About Contact Lenses
If you’re wearing contact lenses when a chemical hits your eye, start flushing immediately. Don’t waste time trying to remove the lenses first. Once you’re at the station and water is flowing, try to slide the lenses out while continuing to irrigate. Contact lenses can trap chemicals against the cornea and block the flushing water from reaching the surface underneath. They also reduce oxygen flow to the cornea, which makes the tissue more vulnerable to infection and deeper injury. Getting them out during the flush, rather than before it, is the right compromise between speed and thoroughness.
Know Where Your Station Is Before You Need It
OSHA requires eyewash stations to be within 10 feet of any area where corrosive materials are handled. The path between the hazard and the station must be unobstructed, with no doors, stairs, or obstacles you’d have to navigate while temporarily blinded. If you work near chemicals, walk the route from your workstation to the eyewash before an emergency happens. Seconds count: the faster you begin flushing, the less time a chemical has to penetrate tissue.
The station should also be on the same level as the hazard. Having to go up or down stairs, or through a doorway that requires a key card, defeats the purpose. If you notice anything blocking the path or the station itself, report it before it becomes a problem during an actual exposure.
After You Finish Flushing
Once you’ve completed the full flush, don’t assume you’re fine just because the pain has decreased. Chemical eye injuries often feel better temporarily after irrigation but can worsen over the following hours as inflammation builds. You need a professional eye examination that checks for corneal damage, measures the pressure inside your eye, and looks for signs of deeper chemical penetration.
For mild exposures that caused only minor irritation, treatment typically involves lubricating eye drops and a short course of antibiotic drops to prevent infection while the surface heals. More serious burns may need ongoing irrigation in a medical setting for 12 to 24 hours, along with medications to control pain and reduce inflammation. Either way, if your symptoms haven’t improved or have gotten worse within 24 hours, you need to be re-evaluated.
Keep the container or safety data sheet for whatever chemical was involved. Knowing the exact substance, its concentration, and whether it’s an acid or alkali helps medical providers determine how aggressively to treat the injury and what complications to watch for.