Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Eye Health Center

Font Size

Chemical Eye Burns

Chemical Eye Burn Overview

Chemical exposure to any part of the eye or eyelid may result in a chemical eye burn. Chemical burns represent 7%-10% of eye injuries. About 15%-20% of burns to the face involve at least one eye. Although many burns result in only minor discomfort, every chemical exposure or burn should be taken seriously. Permanent damage is possible and can be blinding and life-altering.

The severity of a burn depends on what substance caused it, how long the substance had contact with the eye, and how the injury is treated. Damage is usually limited to the front segment of the eye, including the cornea, (the clear front surface of the eye responsible for good vision, which is most frequently affected), the conjunctiva (the layer covering the white part of the eye), and occasionally the internal eye structures of the eye, including the lens. Burns that penetrate deeper than the cornea are the most severe, often causing cataracts and glaucoma.

Recommended Related to Eye Health

Zinc for Vision

Zinc is an essential trace mineral that's important for the immune system and the brain, as well as other parts of the body. In infants, zinc deficiency can delay normal development. At any age, serious zinc deficiency can lead to risk of infections. Eye-related benefits. Zinc is believed to be important for vision because high levels of the mineral are found in the macula, part of the retina. Zinc enables vitamin A to create a pigment called melanin, which protects the eye. Some studies...

Read the Zinc for Vision article > >

Chemical Eye Burn Causes

Most chemical eye injuries occur at work. Industries use a variety of chemicals daily. However, chemical injuries also frequently occur at home from cleaning products or other regular household products; these injuries can be just as dangerous and must be treated seriously and immediately.

Chemical burns to the eye can be divided into three categories: alkali burns, acid burns, and irritants.

The acidity or alkalinity, called the pH, of a substance is measured on a scale from 1-14, with 7 indicating a neutral substance. Substances with pH values less than 7 are acids, while numbers higher than 7 are alkaline; the higher or lower the number, the more acidic or basic a substance is and the more damage it can cause.

  • Alkali burns are the most dangerous. Alkalis-chemicals that have a high pH-penetrate the surface of the eye and can cause severe injury to both the external structures like the cornea and the internal structures like the lens. In general, more damage occurs with higher pH chemicals.

    • Common alkali substances contain the hydroxides of ammonia, lye, potassium hydroxide, magnesium, and lime.

    • Substances you may have at home that contain these chemicals include fertilizers, cleaning products (ammonia), drain cleaners (lye), oven cleaners, and plaster or cement (lime).

  • Acid burns result from chemicals with a low pH and are usually less severe than alkali burns, because they do not penetrate into the eye as readily as alkaline substances. The exception is a hydrofluoric acid burn, which is as dangerous as an alkali burn. Acids usually damage only the very front of the eye; however, they can cause serious damage to the cornea and also may result in blindness.

    • Common acids causing eye burns include sulfuric acid, sulfurous acid, hydrochloric acid, nitric acid, acetic acid, chromic acid, and hydrofluoric acid.

    • Substances you have at home that may contain these chemicals include glass polish (hydrofluoric acid), vinegar, or nail polish remover (acetic acid). An automobile battery can explode and cause a sulfuric acid burn. This is one of the most common acidic burns of the eye.

  • Irritants are substances that have a neutral pH and tend to cause more discomfort to the eye than actual damage.

    • Most household detergents fall into this category.

    • Pepper spray is also an irritant. It can cause significant pain but usually does not affect vision and rarely causes any damage to the eye.
1 | 2 | 3 | 4 | 5

Today on WebMD

Woman holding tissue to reddened eye
Learn about causes, symptoms, and treatments.
Simple annoyance or the sign of a problem?
red eyes
Symptoms, triggers, and treatments.
blue eye with contact lens
Tips for wearing and caring.
Understanding Stye
human eye
eye exam timing
vision test
is vision correction surgery for you
high tech contacts
eye drop