Causes and Prevention of Night Blindness | Ophthalmology

Night Blindness

What is night blindnessĀ or nyctalopia?

Night blindness is a type of visual impairment. People with it, may not be able to focus properly at night or in low light conditions. Some types of night blindness are treatable, not other types. See if your doctor can determine the root cause of your vision defect.

When your eyes shift from bright weather to a dimly light area, you are more likely to experience night blindness when leaving the sunny sidewalk to enter a dimly light restaurant. You are less likely to experience distractions while driving due to the intermittent glare of headlights and street lights on the highway.


  • Vision or blurred vision when looking at distant objects
  • Cataract or lens cloud
  • Retinitis pigmentosa, which accumulates dark pigment in the retina and creates tunnel vision
  • Usher syndrome is a genetic condition that affects both hearing and vision.

Adults are at risk for cataracts. Therefore, they are more likely to have it due to cataracts than children or adolescents. A nutritious diet can change and vitamin A deficiency can lead to night blindness.

Vitamin A, also known as retinal, plays a role in converting retinal nerve impulses into images. People with pancreatic insufficiencies, such as people with cystic fibrosis, have difficulty absorbing fat and are at risk for vitamin A deficiency, as they are more likely to burn fat. You are at risk of developing night blindness.

People with high blood glucose (sugar) levels or diabetes are at risk for eye diseases such as cataracts.


Your ophthalmologist will take a detailed medical history and examine your eyes to confirm night blindness. A blood test can measure your levels of vitamin A and glucose.

Night blindness due to myopia, cataracts, or vitamin A deficiency can be treated. Corrective lenses, such as glasses or contact lenses, improve day and night vision.

Tell your doctor if you have problems with dim lighting, even with corrective lenses.

Cataracts: The cloudy parts of the lens of the eye are called the cornea. Cataracts can be removed surgically. Your surgeon will replace your fogged lens with a clear artificial lens.

Vitamin A deficiency: If your vitamin A levels are low, your doctor may recommend vitamin supplements. Take the supplements as prescribed. Most people are not deficient in vitamin A because they receive adequate nutrition.

Genetic conditions: This is the cause of night blindness, such as retinitis pigmentosa, which cannot be treated. People with this type of night blindness should avoid driving at night.


You cannot prevent it as a result of genetic conditions such as birth defects or Usher syndrome. However, you can properly control your blood sugar levels and eat a balanced diet to minimize night blindness. Eat a diet rich in antioxidants, vitamins, and minerals, which can help prevent cataracts. Also, choose a diet rich in vitamin A to reduce the risk of night blindness.

Some orange foods are excellent sources of vitamin A, including:

  • Melons
  • Sweet potatoes
  • Carrots
  • Pumpkins
  • pumpkin
  • Mangoes

Vitamin A is also present in:

  • Spinach
  • Cabbage
  • Milk
  • Eggs
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