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Everything You Need to Know About Binocular Vision Disorder

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Person sitting at a desk covering tired eyes with both hands from eye strain

You’re halfway through the day, and the screen in front of you seems to blur. Your head starts to ache, your eyes feel strained, and it seems like focusing takes more effort than it should. Or maybe your child struggles with reading or loses their place on the page—an issue that is often misdiagnosed as inattention or learning difficulty.

What if the root issue wasn’t poor vision, but poor eye alignment? Symptoms like the ones described above may point to binocular vision disorder (BVD), a condition that occurs when the eyes don’t work together the way they’re supposed to.

Binocular vision disorder is more common than many people realize—and it’s often misdiagnosed or overlooked. The good news? New treatments like Neurolens are helping patients find relief by correcting eye misalignment at its source.

What Is Binocular Vision Disorder?

Binocular vision disorder occurs when the eyes are unable to work together effectively to form a single, clear image. While each eye may see clearly on its own, together they struggle to stay in sync. This mismatch causes the brain to work harder to process visual information, leading to symptoms like strain, headaches, and fatigue.

This condition doesn’t always show up on a standard eye exam because the eyes may appear “normal” in terms of sharpness. It’s not about seeing 20/20—it’s about how well both eyes function as a team.

Symptoms of BVD

The symptoms of BVD can affect both children and adults, and they often present in ways that mimic other issues like migraines, anxiety, ADHD, or digital eye strain. These include:

  • Frequent headaches or migraines
  • Eye strain or fatigue, especially with screen time
  • Difficulty focusing for long periods
  • Blurred or double vision
  • Dizziness or motion sensitivity
  • Neck and shoulder tension
  • Light sensitivity
  • Poor reading comprehension or skipping lines

In children, symptoms may appear as behavioural issues, lack of interest in schoolwork, or complaints about vision that don’t seem to match test results.

Causes of BVD

BVD is typically caused by small misalignments in the eyes. These are often too subtle to notice visually, but are nonetheless significant enough to affect the performance of yours. These misalignments create an imbalance between what each eye sees, which forces the brain to work harder to merge the images.

Contributing factors include:

  • Eye muscle imbalances
  • Neurological signal delays
  • Extended near-vision tasks (like computer or phone use)
  • Developmental issues with the visual system

Even a minor misalignment can result in major discomfort over time, particularly in today’s digital world.

Eye care professional operating diagnostic equipment during a vision exam

What Is Neurolens?

Neurolens is the first and only prescription lens that incorporates contoured prism technology to correct misalignment of the eyes at all distances—near, intermediate, and far.

Unlike standard lenses, which address refractive errors (like nearsightedness), Neurolens addresses binocular misalignment, which is often the root cause of symptoms associated with BVD.

How Does Neurolens Work?

Neurolens uses a specially designed prism to gently realign the eyes. Each lens is tailored based on a highly precise Neurolens Measurement Test, which detects misalignments as small as 0.1 prism diopters.

These lenses reduce the effort your brain needs to combine images from each eye, thereby offering relief from headaches, eye strain, and neck pain—especially for people who spend hours reading or using digital devices.

Who Can Benefit from Neurolens?

Neurolens is ideal for people who experience chronic visual discomfort, even if their vision seems “fine” on a regular eye test. You may benefit if you:

  • Spend several hours a day on digital devices
  • Experience headaches by mid-afternoon
  • Have been told your vision is normal, yet still struggle to focus
  • Notice strain, pain, or fatigue around your eyes or neck
  • Have tried other vision solutions with limited results

For children, it can improve focus and reading ability. For adults, it can dramatically improve comfort at work and during daily tasks.

Diagnosing BVD

A standard vision test won’t always catch BVD. Diagnosis requires a functional vision assessment that evaluates how the eyes work together in real-life situations.

During a comprehensive exam for BVD, you can expect:

  • Evaluation of eye teaming, tracking, and focusing skills
  • Measurement of misalignment at various distances
  • A discussion of visual symptoms and how they affect daily life

If BVD is diagnosed, your provider may recommend Neurolens or another treatment option, depending on your needs.

Other Treatment Options

While Neurolens is often a first choice for adults and older children, other options may also be considered:

Vision Therapy

For younger patients or those with more complex cases, vision therapy can be effective. This involves in-office exercises and at-home routines to improve eye coordination, focus, and tracking. Vision therapy works much like physical therapy, helping the visual system “retrain” itself for better performance.

Standard Prism Glasses

Traditional prism glasses can help with larger or more obvious misalignments, particularly in cases of double vision. However, they don’t offer the same dynamic correction that Neurolens provides across all distances.

What to Expect With Neurolens

The process for getting Neurolens glasses is simple:

  1. Measurement: A brief, non-invasive Neurolens test measures your unique eye misalignment.
  2. Prescription: Based on your measurements and symptoms, your provider writes a custom prescription.
  3. Fitting: Once your lenses arrive, you’ll be fitted and guided through the adjustment period.
  4. Relief: Many patients notice significant symptom relief within days to weeks of consistent wear.

Why Addressing BVD Matters

An untreated binocular vision disorder can take a toll on your quality of life. It can affect productivity, learning, emotional well-being, and overall comfort. For children, it may impact school performance and confidence. For adults, it can lead to chronic discomfort and frustration.

Correcting eye misalignment with Neurolens or other treatments doesn’t just improve vision—it can improve your life.

Discover Your Path to Clear, Comfortable Vision

If you’re struggling with headaches, fatigue, or trouble focusing, but traditional glasses haven’t helped, it might be time to explore a different kind of solution. Binocular vision disorder is more common than most people realize, and you don’t have to keep pushing through the discomfort.

At Kennedy Eye Clinic in Saskatoon, we specialize in identifying and treating BVD with advanced solutions like Neurolens. Let us help you or your child find relief and clarity. Book your appointment today to learn more about Neurolens and how we can support your journey to better vision and greater comfort.

Written by Kennedy Eye Clinic

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