How long should you flush an eye exposed to a chemical?

Flushing an eye exposed to a chemical is a critical first aid step to minimize damage and reduce the risk of long-term injury. The recommended duration of at least 15 minutes is based on guidelines from health organizations and first aid protocols. Flushing for this length of time allows for thorough irrigation of the eye, helping to dilute and remove the harmful substance effectively.

During the first minutes of flushing, chemical residues can begin to irritate the tissues of the eye, leading to potential burns or other injuries. The extended time ensures that the chemical is adequately washed away and that any residual particles are cleared from the surface. Activating the corneal reflex through this prolonged flushing can help promote further tearing, which also assists in the cleansing process.

While 5, 10, or 20 minutes might seem reasonable durations at first glance, they do not align with established safety protocols for dealing with chemical exposure in the eyes. Five minutes may not be sufficient for thorough cleaning, while 20 minutes is generally considered excessive in most protocols. The 15-minute guideline strikes a balance, ensuring optimal eye safety while remaining practical in emergency situations.