Keratomalacia
What is Keratomalacia?
Keratomalacia is a serious eye condition that causes the cornea to soften and break down. The cornea is the clear front surface of your eye that helps you focus light. When it softens, it can develop ulcers, deep sores that damage vision. In severe cases, the cornea can perforate, meaning it develops a hole.
This condition happens almost exclusively due to severe vitamin A deficiency. Vitamin A is essential for maintaining healthy eye tissue and supporting your ability to see in low light. Without enough vitamin A, the eye cannot produce the proteins needed to keep the cornea strong and intact. Keratomalacia most often affects young children in areas where malnutrition is common, but it can occur in adults with absorption problems or restrictive diets.
The good news is that keratomalacia is preventable and treatable when caught early. Identifying vitamin deficiencies through blood testing and dietary changes can protect your vision before serious damage occurs. This is why monitoring your nutritional status through regular testing matters so much for long term eye health.
Symptoms
- Dryness of the eyes and inability to produce tears
- Night blindness or difficulty seeing in dim light
- Clouding or whitish spots on the cornea
- Softening of the corneal tissue
- Corneal ulcers or open sores on the eye surface
- Blurred or decreased vision
- Eye pain or discomfort
- Sensitivity to light
- Thick, dry patches on the white part of the eye
Early stages of vitamin A deficiency may cause only mild dryness and night vision problems. Many people do not notice symptoms until the cornea begins to soften. This is why testing your vitamin levels before symptoms appear is so important.
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Causes and risk factors
Keratomalacia is caused by severe and prolonged vitamin A deficiency. Your body cannot make vitamin A on its own, so you must get it from food. Vitamin A is found in liver, dairy products, eggs, and orange or dark green vegetables like carrots and spinach. When your diet lacks these foods for months or years, your body depletes its vitamin A stores. The eyes are among the first organs to show damage because they need constant vitamin A to maintain the cornea and support vision.
Certain conditions increase your risk of vitamin A deficiency beyond poor diet. Digestive disorders like Crohn disease, celiac disease, and chronic diarrhea can prevent your body from absorbing vitamin A properly. Liver disease can interfere with vitamin A storage. Alcohol use disorder affects both absorption and storage. Strict vegan or restrictive diets without fortified foods can also lead to deficiency over time. Infants who are not breastfed and do not receive vitamin A supplements face higher risk in areas where malnutrition is common.
How it's diagnosed
Doctors diagnose keratomalacia through an eye examination using a special microscope called a slit lamp. This allows them to see corneal softening, ulcers, and other changes in eye tissue. They will also ask about your diet, digestive health, and any vision changes you have noticed. The appearance of a soft, hazy, or ulcerated cornea combined with signs of malnutrition usually confirms the diagnosis.
Blood tests measuring vitamin A levels, also called retinol levels, help identify the underlying deficiency before severe eye damage occurs. Catching low vitamin A early means you can address the problem through diet and supplements before your cornea is affected. Talk to a doctor about testing if you have digestive problems, follow a restrictive diet, or notice night vision changes. Early detection through blood work is your best defense against permanent vision loss.
Treatment options
- Immediate high dose vitamin A supplementation under medical supervision
- Intravenous vitamin A for severe cases or absorption problems
- Antibiotic eye drops or ointments to prevent infection
- Protective eye patches to shield damaged corneas during healing
- Dietary changes to include vitamin A rich foods like liver, eggs, dairy, sweet potatoes, and leafy greens
- Treatment of underlying digestive disorders that prevent nutrient absorption
- Ongoing monitoring of vitamin A levels through blood tests
- Surgical repair for corneal perforation in advanced cases
You must see a doctor immediately if you suspect keratomalacia. This is a medical emergency that requires urgent treatment to save your vision. With prompt vitamin A replacement, most people experience significant improvement. Delayed treatment can result in permanent blindness or loss of the eye.
Frequently asked questions
Keratomalacia is caused by severe vitamin A deficiency that lasts for months or years. Without enough vitamin A, the cornea loses its structural integrity and begins to soften. This condition is most common in areas with limited access to nutritious food, but it can also occur in people with digestive disorders that prevent vitamin absorption.
Early stage keratomalacia can often be reversed with immediate high dose vitamin A treatment. The cornea can heal and vision can improve significantly when treatment starts quickly. However, severe cases with corneal perforation or extensive scarring may result in permanent vision loss even with treatment.
Keratomalacia typically develops after months to years of severe vitamin A deficiency. Early signs like night blindness and eye dryness appear first. If the deficiency continues untreated, the cornea begins to soften and ulcerate, which can happen over weeks to months.
Young children in areas with malnutrition face the highest risk. Adults with digestive disorders like Crohn disease or celiac disease are also vulnerable because they cannot absorb vitamin A properly. People with liver disease, alcohol use disorder, or very restrictive diets without fortified foods also have increased risk.
Foods rich in vitamin A include liver, egg yolks, whole milk, cheese, and fortified dairy products. Plant sources include sweet potatoes, carrots, spinach, kale, and other orange or dark green vegetables. Your body converts the beta carotene in these vegetables into vitamin A.
Dry eye is a common condition causing mild discomfort and insufficient tears. Keratomalacia is a severe nutritional deficiency disease that causes the cornea to actually soften and break down. Keratomalacia can lead to blindness and is a medical emergency, while dry eye is usually manageable with drops and lifestyle changes.
Yes, adults can develop keratomalacia, though it is less common than in children. Adults with malabsorption conditions, liver disease, or severe dietary restrictions are most at risk. Anyone who cannot absorb or store vitamin A properly can develop this condition regardless of age.
A vitamin A or retinol blood test measures the level of vitamin A in your bloodstream. Low levels indicate deficiency before eye damage occurs. Regular testing is important if you have digestive problems or follow restrictive diets, as catching deficiency early prevents serious complications.
Keratomalacia is rare in developed countries because most people have access to vitamin A through fortified foods and diverse diets. However, it can still occur in people with severe malabsorption disorders, eating disorders, or chronic alcoholism. Most cases worldwide occur in areas where childhood malnutrition is common.
Adults need about 700 to 900 micrograms of vitamin A daily. Children need less depending on age. Most people in developed countries get enough through a balanced diet with dairy, eggs, and vegetables. If you have absorption problems, you may need higher doses through supplements under medical supervision.