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What Is an Ocular Alkali Burn?

An ocular alkali burn is a chemical injury to the eye caused by alkaline substances such as lye, ammonia, or wet cement. Alkali agents penetrate the ocular surface quickly and can damage the cornea, conjunctiva, and deeper tissues. The injury can lead to severe pain, redness, and loss of vision. Because tissue damage can progress even after exposure stops, immediate and thorough irrigation is the first and most important step.

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What Is an Ocular Alkali Burn?

An ocular alkali burn is a chemical injury to the eye caused by alkaline substances such as lye, ammonia, or wet cement. Alkali agents penetrate the ocular surface quickly and can damage the cornea, conjunctiva, and deeper tissues. The injury can lead to severe pain, redness, and loss of vision. Because tissue damage can progress even after exposure stops, immediate and thorough irrigation is the first and most important step.

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Common Sources and Mechanism of Injury

Household cleaners, industrial degreasers, fertilizers, and wet concrete are frequent sources of alkali exposure. These chemicals have high pH and can saponify cell membranes, allowing deeper penetration into the corneal stroma and anterior segment. Unlike many acids, which tend to cause more surface coagulation, alkali substances can keep spreading into the eye. Even small splashes can be dangerous when not rinsed out quickly. Lack of eye protection in work settings increases risk.

Symptoms and Initial Appearance

Patients feel intense pain, burning, tearing, and a strong urge to keep the eye closed. Vision often drops suddenly. On early examination, the conjunctiva may look white and blanched in severe burns due to vessel damage. The cornea can appear hazy, and epithelial defects are common. Intraocular pressure may rise acutely from trabecular injury. The full extent of damage can be hard to judge immediately and may evolve over hours to days.

Diagnosis and Emergency Management

Diagnosis is based on history of chemical exposure and rapid assessment in an emergency setting. Irrigation with copious water or saline begins as soon as possible, ideally on site, and continues until ocular surface pH is near neutral. Particulate material such as lime or cement is carefully removed from the fornices. After irrigation, ophthalmic examination assesses limbal ischemia, corneal clarity, epithelial loss, and intraocular pressure. Burns are graded to help predict outcome and guide therapy.

Long-Term Treatment and Prognosis

Ongoing treatment can include topical antibiotics, cycloplegics, corticosteroids in selected phases, and agents that support epithelial healing such as lubricants and vitamin C. Severe burns may need amniotic membrane grafts, limbal stem cell transplantation, or later corneal transplantation. Glaucoma, scarring, and dry eye are frequent long term complications. Prognosis depends heavily on the strength of the alkali, time to irrigation, and degree of limbal damage. Lifelong follow up is often needed in serious cases.

FAQs About Ocular Alkali Burns

What should I do first if alkali gets in my eye?

Start rinsing the eye immediately with clean water or saline and continue while seeking emergency care.

Can I wait to go to the hospital if the pain eases?

No, even if pain lessens, damage can still progress, so urgent professional evaluation is important.

Are alkali burns worse than acid burns?

Alkali burns often cause deeper penetration and can be more destructive, though any chemical burn is serious.

Will my vision recover after an alkali burn?

Some people recover useful vision, especially after milder burns and fast irrigation, but severe injuries can leave lasting impairment.

References

EyeWiki. ?Chemical Injury of Conjunctiva and Cornea.? https://eyewiki.org/Chemical_Injury_of_Conjunctiva_and_Cornea

American Academy of Ophthalmology. ?Chemical Burns of the Eye.? https://www.aao.org/eye-health/tips-prevention/chemical-burns-eye

StatPearls (NCBI Bookshelf). ?Ocular Burns.? https://www.ncbi.nlm.nih.gov/books/?term=ocular+burns+statpearls

Mayo Clinic. ?Chemical splash in the eye: First aid.? https://www.mayoclinic.org/first-aid/first-aid-chemical-splash/basics/art-20056607

Merck Manual Professional Edition. ?Ocular Burns.? https://www.merckmanuals.com/professional/injuries-poisoning/eye-trauma/ocular-burns