top of page

Binocular Vision Dysfunction (BVD): Frequently Asked Questions

If you’ve been experiencing symptoms like dizziness, headaches, anxiety, or visual strain — and haven’t found clear answers — you’re not alone. These are some of the most common questions we hear from patients exploring Binocular Vision Dysfunction (BVD).

We’ve created a comprehensive Binocular Vision Dysfunction (BVD) FAQ guide for patients who want a deeper explanation.
This downloadable guide covers:

​

  • Costs and insurance

  • TheraLens® micro-prism vs standard prism, Neurolens, and vision therapy

  • Ehlers-Danlos Syndrome (EDS), POTS, and neurodivergence

  • What to expect during the exam and treatment process​​

​​

If you prefer to read everything in one place — or want something easy to share with family or providers — the full FAQ guide may be helpful.

What is Binocular Vision Dysfunction (BVD)?

Binocular Vision Dysfunction (BVD) is a subtle eye misalignment that makes the brain work harder to keep vision single and comfortable.

​​

For clear, stable vision, both eyes must point at the same place. When they don’t — due to muscle or nerve differences, concussion, connective tissue conditions, or age-related changes — the brain struggles to merge the images from each eye. Over time, this constant compensation can lead to physical and neurological symptoms.​

​​

Common symptoms include:

  • Headaches or migraines

  • Dizziness or motion sensitivity

  • Anxiety or feeling “on edge”

  • Difficulty reading or concentrating

  • Light sensitivity

  • Visual overwhelm or fatigue

​​

This group of symptoms is what we call Binocular Vision Dysfunction.

What symptoms does BVD cause?

BVD can cause dizziness, headaches, migraines, anxiety, motion sickness, light sensitivity, difficulty reading, brain fog, trouble walking down aisles, problems with depth perception, and feeling overwhelmed in busy environments. Many patients say they “don’t feel like themselves” until the misalignment is corrected.

Why hasn’t this been found on my past eye exams?

Standard eye exams focus on how clearly you see and whether your eyes are healthy. They are not designed to detect the subtle eye misalignments that cause Binocular Vision Dysfunction.

BVD requires specialized NeuroVisual testing that evaluates how the eyes work together under real-world conditions. Without this testing, BVD is often missed — even when symptoms are significant.

How is BVD diagnosed?

BVD is diagnosed through a comprehensive NeuroVisual Medicine exam. This exam evaluates how the eyes work together using specialized testing that goes far beyond a standard eye chart or routine vision exam.

How is BVD treated?

Treatment is based on a comprehensive NeuroVisual Medicine evaluation. For many patients, this includes a custom micro-prism lens option designed to reduce eye misalignment and visual strain.

How quickly will I notice improvement?

Some patients notice changes during their exam or shortly after wearing micro-prism lenses. Others improve more gradually as their visual system adapts. Response time varies, and adjustments are a normal part of the process.

Do I need to wear the glasses all the time?

Yes. When prescribed, micro-prism lenses must be worn full time for best results. Consistent wear allows the visual system to stabilize and adapt.

What should I do if I think I have BVD?

The first step is a comprehensive NeuroVisual Medicine exam to determine whether BVD is contributing to your symptoms.

bottom of page