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Night Blindness: Symptoms, Causes, and Solutions

Do you have trouble seeing clearly while driving or cycling at dusk or in darkness? Then you may be suffering from night blindness. In this blog, we'll explain more about the symptoms, causes, and possible treatments for night blindness.

What Are the Symptoms of Night Blindness?

Firstly, it's important to note that it's normal to see less clearly at night than in well-lit conditions. However, if you notice your eyes struggling to distinguish objects in low light or finding it difficult to adapt to twilight and darkness, that could indicate night blindness. This condition is often noticeable in traffic, where you might be quickly blinded by, for example, oncoming vehicle headlights, or find it harder to see dimly lit streets, road markings, or turns sharply.

What Causes Night Blindness?

Night blindness can have various causes, ranging from deficiencies in essential nutrients to hereditary factors. Some of the common causes include:

Nutrient Deficiency (Vitamin A)

The rods, photoreceptors in the eye that respond to light, require Vitamin A to function properly. A lack of Vitamin A can therefore cause night blindness. Foods such as liver, dairy products, fish liver oil, dark green leafy vegetables, orange and yellow fruits and vegetables, fatty fish, nuts, seeds, and eggs can help. Beta-carotene-rich foods, such as carrots or spinach, can also contribute to the production of Vitamin A.

Myopia (Nearsightedness)

Night blindness can occur due to myopia, where the eye bends light rays too far forward, forming the image in front of the retina. Especially in low-light situations, such as at night, this focus error is more pronounced with myopia. Wearing the right glasses or contact lenses can help correct the focus of light and reduce night blindness.

Hereditary Night Blindness

Night blindness can also be inherited, often falling under retinitis pigmentosa, an inherited disorder in which cells in the retina slowly break down, leading to progressive night blindness. This affects approximately 1 in 3,500 people. Night blindness can also occur as a symptom of another illness or condition. Diseases commonly associated with night blindness include cataracts (clouding of the lens of the eye) and glaucoma (increased eye pressure that can cause damage to the optic nerve).

Can Night Blindness Be Prevented?

Unfortunately, the hereditary variant of night blindness cannot be prevented. In the case of non-hereditary forms, you can reduce the risk by giving your eyes enough rest and eating a balanced diet with sufficient Vitamin A. While preventing hereditary night blindness is generally not possible, regular eye checks can help identify early signs. To limit night blindness due to myopia, wearing the correct glasses is important, while a healthy and varied diet rich in Vitamin A can help prevent night blindness due to Vitamin A deficiency.

What Can You Do About Poor Vision in the Dark?

Treatment for night blindness depends on the underlying cause. Supplementing this vitamin can help with a Vitamin A deficiency, while the right glasses or lenses offer a solution for uncorrected myopia. In the case of hereditary night blindness, treatment is often limited, but regular eye checks are essential.

Effect of Night Vision Glasses

Night vision glasses, also known as night goggles, feature special yellow lenses that increase contrast and dim bright lights, improving vision in the dark. These specialized prescription lenses can help reduce blurred vision and glare. At Glazoo, we can place these lenses in any existing frame, so you can get back on the road comfortably and safely!

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