What You Should Know About Night Blindness

If you struggle to see well while driving at night or find it difficult to navigate dimly lit rooms, you may have night blindness. Night blindness, also called nyctalopia, is the inability to see clearly in low-light conditions. It is not an eye disease on its own but rather a symptom of an underlying condition. For patients in Henderson and across the Las Vegas valley, our team at Insight Vision Optometry, Las Vegas can help identify the cause and recommend the right treatment.

What Causes Night Blindness?

The inability to see well at night can result from a variety of eye conditions. Understanding the possible causes is the first step toward finding relief.

Vitamin A Deficiency

Vitamin A plays a key role in maintaining a clear cornea and is an essential component of rhodopsin, a protein that enables your eyes to function in low light. Although uncommon in North America, a deficiency of this vitamin can contribute to night blindness.

Cataracts

As proteins build up on the eye’s natural lens, vision becomes increasingly cloudy. This cloudiness often makes it particularly difficult to see clearly at night or in poor lighting.

Diabetic Retinopathy

Diabetes can damage the blood vessels and nerves in the retina, leading to various forms of vision loss including difficulty seeing at night. Annual diabetic eye exams are essential for early detection.

Glaucoma

This group of eye diseases involves increased pressure inside the eye that damages the optic nerve. Both the disease itself and some of the medications used to treat it can reduce your ability to see well in dim lighting.

Uncorrected Myopia

Nearsightedness makes distant objects appear blurry, and many patients with uncorrected or undercorrected myopia describe a starburst or halo effect around lights at night. An updated prescription can often significantly improve nighttime vision.

Keratoconus

This condition causes the cornea to thin and bulge into an irregular shape, leading to distorted vision, light sensitivity, and glare that tend to be worse at night.

Retinitis Pigmentosa

Retinitis pigmentosa (RP) is a progressive genetic eye disease that damages the retina over time. Night blindness and gradual peripheral vision loss are among its earliest and most common symptoms.

Usher Syndrome

This genetic condition causes both hearing loss and progressive vision loss, including night blindness associated with retinitis pigmentosa.

What Are the Symptoms of Night Blindness?

Because night blindness can be a sign of serious underlying eye conditions, it is important to pay attention to changes in how well you see in low light. Contact your eye doctor if you notice that your night vision is declining. Common symptoms include:

• Reduced contrast sensitivity, making it harder to distinguish objects from their background
• Difficulty seeing pedestrians or obstacles outdoors at night
• Trouble seeing in dimly lit places such as movie theaters or restaurants
• Difficulty adapting to changing light conditions while driving at night
• Excessive squinting when in dark or low-light environments
• Slow adjustment when moving from bright areas to darker ones

How Is Night Blindness Treated?

Treatment depends entirely on the underlying cause, which is why a thorough eye exam is the essential first step. Some examples of how different causes are managed include:

• Vitamin A deficiency can be addressed with dietary changes and supplements rich in vitamin A, such as sweet potatoes, carrots, leafy greens, and fish
• Myopia can be corrected with updated eyeglasses or contact lenses
• Cataracts that interfere with daily life may be addressed through cataract surgery, which our team co-manages with trusted surgeons
• Glaucoma and diabetic retinopathy require ongoing monitoring and medical treatment to protect remaining vision
• Keratoconus can be managed with specialty contact lenses that provide clearer, more stable vision

For conditions such as retinitis pigmentosa or Usher syndrome, where night blindness cannot be reversed, low vision aids and adaptive devices can help you make the most of your remaining vision.

Can Night Blindness Be Prevented?

While there is no proven way to prevent night blindness caused by genetic conditions or birth defects, you can take steps to support your overall eye health and potentially slow the onset of some conditions. Eating a nutrient-rich diet, managing chronic conditions like diabetes and high blood pressure, wearing UV-protective sunglasses, and keeping up with regular eye exams all play a role in preserving your night vision.

If you experience difficulty seeing at night or in dim lighting, do not wait for symptoms to worsen. Call Insthe areaon Optometry in the area at 702-747-4070 or visit www.insightvisionlv.com to schedule your appointment today.