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What You Should Know About Night Blindness

Our Optometrist in Seattle, explains About The Causes of Night Blindness

Our eye doctor can help diagnose, manage and treat your night blindness so that you can enjoy being out at night again.

Here are 4 things you should know about night blindness:

The inability to see well at night can be the result of a condition such as:

  • Vitamin A Deficiency Vitamin A helps keep your cornea, the layer at the front of your eye, clear; it’s also an important component of rhodopsin, a protein that enables you to see in low light conditions. Although uncommon in North America, deficiency of this vitamin can induce night blindness.
  • Cataracts
    A buildup of protein clouds the eye’s lens, leading to impaired vision, especially at night and in poor lighting conditions.
  • Diabetic retinopathy
    Damage to the eyes’ blood vessels and nerves can result in vision loss, including difficulty seeing at night.
  • Glaucoma
    This group of eye diseases is associated with pressure build-up in the eye that damages the optic nerve. Both Glaucoma and the medications used to treat it can cause night blindness.
  • Myopia
    Also called nearsightedness, Myopia makes distant objects appear blurry, and patients with it describe a starburst effect around lights at night.
  • Keratoconus
    An irregularly shaped cornea causes blurred vision and may involve sensitivity to light and glare which tend to be worse at night.
  • Retinitis Pigmentosa (RP)
    A progressive genetic eye disease which can be associated with other diseases, RP leads to night blindness and peripheral vision loss.
  • Usher Syndrome
    This genetic condition causes both hearing loss and vision loss, including night blindness and RP, mentioned above.

Symptoms of Nyctalopia

Since night blindness is a symptom of some serious vision problems, it’s important to get your eyes checked regularly to ensure that everything is in good working order. Contact your eye doctor as soon as possible if you notice that you don’t see as well in dim light as you used to, such as when driving at night or when adjusting from being outdoors in the sunshine to being indoors.

Symptoms of Night Blindness Include:

  • Reduced contrast sensitivity
  • Difficulty seeing people outdoors at night
  • Difficulty seeing in places with dim lighting, like a movie theater
  • Trouble adapting to the dark while driving
  • Excessive squinting at night
  • Trouble adjusting from bright areas to darker ones

Treatments for Night Blindness

Your eye doctor will want to diagnose the cause of your night blindness in order to treat it. For example, in the rare case of vitamin A deficiency, it can be treated with vitamin supplements and vitamin-A rich foods; Myopia can be corrected with eyeglasses or contact lenses. Other conditions may require medications or surgery.

If night blindness is caused by a birth defect, Usher syndrome, or retinitis pigmentosa, low vision aids and devices can help you make the most of your remaining vision.

Prevention

While there is no proven way to prevent night blindness resulting from genetic conditions or birth defects, consuming healthy, nourishing foods and taking certain vitamin supplements may prevent or slow the onset of some eye conditions that cause night blindness.

If you experience poor vision at night or in dim lighting, we can help. Contact Hour Eyes Optical in Seattle to schedule your appointment today.

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Frequently asked questions answered by our Eye Doctor in Seattle, Washington:

  • What are the reasons for Cataract Removal?

    Cataracts can interfere with your ability to live normally. They may make it impossible to drive, read, use a computer, watch TV, climb staircases, or identify faces. Cataracts can also get in the way of medical treatment for other eye diseases, such as macular degeneration or diabetic retinopathy because they prevent your eye doctor from inspecting the back tissues of your eye thoroughly. These are all reasons why your eye doctor may recommend cataract surgery.

  • Why Diabetic Eye Exams are Essential?

    At present, one in 10 Americans has diabetes – and the trend is continuing upwards. While routine comprehensive eye exams are important for diagnosing the early signs of diabetes, that doesn’t mean eye exams become insignificant after diagnosis!

  • What is glaucoma?

    Glaucoma describes a type of ocular disease that causes damage to your optic nerve and destroys your quality of vision. With no early symptoms, glaucoma can only be detected by a complete eye examination. When left untreated, glaucoma can result in detrimental vision loss. When treated early by one of our professional, knowledgeable eye doctors, we can help preserve your healthy eyesight.

  • What is Myopia?

    Cataracts can interfere with your ability to live normally. They may make it impossible to drive, read, use a computer, watch TV, climb staircases, or identify faces. Cataracts can also get in the way of medical treatment for other eye diseases, such as macular degeneration or diabetic retinopathy because they prevent your eye doctor from inspecting the back tissues of your eye thoroughly. These are all reasons why your eye doctor may recommend cataract surgery.

 

The Best Foods for Your Eyes

We all know that eating nutrient-rich foods, drinking plenty of water, and exercising can boost our health. So it’s no surprise that these same activities also support eye health. Research has shown that regularly consuming certain vitamins and nutrients can actually prevent or delay sight-threatening eye conditions and diseases such as macular degeneration, cataracts, and glaucoma. 

Here’s a list of the best vitamins, minerals, and nutrients that can help keep your eyes healthy for a lifetime. 

We invite you to consult with our eye doctor, Dr. John J. Bluff, to discuss which nutrients are most suited to your specific eye health and needs. 

Vitamins and Nutrients That Support Eye Health

*Always best to speak with your primary care doctor before taking any vitamins or supplements, and to ensure you consume the correct dosage for your body.

Vitamin A

Vitamin A deficiency can cause a host of eye health issues, including dry eyes and night blindness. In fact, vitamin A deficiency is a leading cause of blindness worldwide.

Vitamins A and A1, which are essential for supporting the eye’s photoreceptors (the light-sensing cells) in the retina, can be found in foods like carrots, leafy greens, egg yolks, liver, and fish. 

Omega-3 Fatty Acids

Eating Omega-3 rich foods like fatty fish can support eye health in a few ways. DHA and EPA, 2 different types of Omega-3 fatty acids, have been shown to improve retinal function and visual development.  

Omega-3 supplements can also ease dry eye symptoms. A randomized controlled study found that people who consumed Omega-3 supplements experienced improved tear quality, which resulted in reduced tear evaporation and increased eye comfort.  

Lutein and Zeaxanthin

Lutein and zeaxanthin are antioxidants that accumulate in the lens and retina and help filter out damaging UV rays and blue light. One study showed that individuals who had the highest levels of these nutrients in their diets had a 43% lower chance of developing macular degeneration than those who had consumed the least amount.  

Spinach, egg yolks, sweet corn, and red grapes are some of the foods that contain high levels of lutein and zeaxanthin. 

Vitamin C 

High amounts of vitamin C can be found in the aqueous humor of the eye, the liquid that fills the eye’s anterior chamber and supports corneal integrity. This has prompted scientists to consider this vitamin’s role in protecting eye health. 

Research suggests that regularly taking vitamin C (along with other essential vitamins and minerals) can lower the risk of developing cataracts, and slow the progression of age-related macular degeneration and visual acuity loss.

While vitamin C appears to support eye health in a variety of ways, it’s still unclear whether taking this supplement benefits those who aren’t deficient. Vitamin C can be found in various fruits and vegetables, like bell peppers, tomatoes, citrus fruits, broccoli, and kale. 

Vitamin E

Vitamin E is an antioxidant that helps protect fatty acids from becoming oxidized. Because the retina has a high concentration of fatty acids, sufficient vitamin E intake is crucial for optimal ocular health. 

Vitamin E can be found in almonds, flaxseed oil, and sunflower seeds. 

Zinc

Healthy eyes naturally contain high levels of zinc. A zinc deficiency can cause night blindness, and thus increasing zinc intake can improve night vision. Zinc also helps absorb Vitamin A, an essential antioxidant. 

Make sure to avoid taking high doses of zinc (beyond 100 mg daily) without first consulting your eye doctor. Higher doses of zinc have been associated with side effects such as reduced immune function. You can increase your zinc intake naturally by consuming more oysters, meat, and peanuts. 

Phytochemical Antioxidants

Phytochemical antioxidants are chemicals produced by plants that contain several health benefits. Some studies show that these plant-based chemicals may enhance vision and eye health as well as prevent age-related eye diseases and complications by alleviating ocular oxidative stress. Oxidative stress within the eyes contributes to several eye conditions, including  dry eye syndrome. Consuming more produce with these antioxidants can help balance the anti-oxidant and pro-oxidant system, resulting in healthier eyes. 

Personalized Eye Nutrition 

If you or someone you know is looking for ways to boost or maintain eye health, speak with an optometrist near you about what supplements and vitamins are best for you. For an eye doctor in Seattle, give us a call at 206-207-0610.

 

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