A chemical in the eye is the one injury where the first ten seconds can decide more than the next ten days. The eye has no skin to buy time. What happens next depends on what the chemical is, how long it stays, and how fast water gets there.
Acid or alkali. Eye doctors sort chemical burns first by what caused them. An alkali, the lye in a drain cleaner or the lime in wet cement, works its way through the surface and keeps going; the American Academy of Ophthalmology’s journal notes that potent alkalis can reach the chamber behind the cornea “in less than 15 seconds.” Most acids work differently. They “denature, coagulate, and precipitate corneal proteins on contact, creating a barrier that prevents deeper penetration of the acid,” which is why acid burns are “generally less destructive” than alkali burns (AAO EyeNet). That is a comparison, not a comfort. Sulfuric acid, the acid in a car battery, is among the more common acids emergency rooms see, and hydrofluoric acid breaks the rule entirely, crossing “the entire thickness of the cornea.”
The first seconds. Nothing changes the outcome more than time to water. The ophthalmologists’ own reference puts it plainly: “Time to initial irrigation has the greatest influence on visual prognosis” (EyeWiki). The eye should be flushed “copiously with any available noncaustic fluid at the injury site and throughout transport to the hospital,” and the flushing goes on at the hospital until the surface of the eye tests neutral again, a pH between 7.0 and 7.2 (AAO). For sulfuric acid, the federal pocket guide gives the first aid in two words: “Irrigate immediately” (NIOSH).
Why the water has to be close. Federal law puts the water where the chemical is. Wherever “the eyes or body of any person may be exposed to injurious corrosive materials,” the employer must provide “suitable facilities for quick drenching or flushing of the eyes and body” within the work area “for immediate emergency use” (29 CFR 1910.151(c)). Pointing to the national consensus standard, OSHA has written that a worker “who may be partly blinded by chemicals in the eyes” must be able to reach and use the eyewash “within 10 seconds,” and that a portable unit must deliver water “continuously for at least 15 minutes” (OSHA, 1992).
What the eye doctor looks for. An eye that has been flushed can look better than it is. The damage that decides its future is often at the edge of the cornea, the limbus, where the stem cells that renew the surface live, and eye doctors grade the injury by the “presence and degree of limbal ischemia,” how much of that edge has lost its blood supply (AAO). The complications can arrive “weeks to months after injury”: scarring and clouding of the cornea, eyelids that fuse to the eye, glaucoma, and loss of vision (EyeWiki). That is why a chemical injury of the eye “presents a genuine, acute emergency and requires immediate evaluation and management” (AAO). The exam needs pH paper and an eye doctor.
What the law does with it. An eye burned at work is rarely only a medical story. The employer must make sure each worker exposed to “liquid chemicals, acids or caustic liquids” uses appropriate eye or face protection (29 CFR 1910.133), which is what Secondary is about, and must report to OSHA within 24 hours when a work injury costs an employee the “loss of an eye” (29 CFR 1904.39). What protection the worker had, where the water was, and whether it ran are the first facts of the case. The next question is who else put the chemical there: the company that delivered it, the maker of the hose or fitting that failed, the operator of the site. Those are usually third parties, outside the workers’ compensation bar that protects the employer (third-party claims).
The eye gives you seconds, not minutes. Everything the law requires around a corrosive chemical is there to buy those seconds back.
The medicine: Hemmati and Colby, “Treating Acute Chemical Injuries of the Cornea,” AAO EyeNet, October 2012; EyeWiki (American Academy of Ophthalmology), Chemical (Alkali and Acid) Injury of the Conjunctiva and Cornea; NIOSH Pocket Guide to Chemical Hazards, Sulfuric acid. The rules: 29 CFR 1910.133, 1910.151(c), 1904.39; OSHA interpretation letter, July 20, 1992. General information, not legal or medical advice.
