Eye Teaming, Tracking & Focusing · Orlando & Clermont
Binocular Vision Dysfunction (BVD)
When the two eyes don't work together as a team, reading, screens, and close work get harder than they should be — even with 20/20 eyesight. BVD is real and very treatable. It is also not the answer to every symptom, and we'll be honest with you about which one you're dealing with.
Overview
What Is Binocular Vision Dysfunction?
Seeing clearly and seeing comfortably are two different things. To read a page or look at a screen, the brain has to aim both eyes at the same spot, focus them, move them smoothly across the line, and blend two images into one — thousands of times a minute, without effort.
Binocular vision dysfunction (BVD) is an umbrella term for problems with those skills. The eyes may be perfectly healthy and see 20/20 on a chart, but the system that coordinates them isn't working efficiently. The brain compensates by working harder, and that extra effort shows up as strain, headaches, blur, doubling, lost place, and fatigue.
Because a routine eye exam mainly checks clarity and eye health, BVD is often missed. Diagnosing it takes testing designed specifically for how the eyes work together.
Types
What Falls Under "BVD"
BVD isn't a single diagnosis. Your evaluation pinpoints which skill is breaking down, because that determines the treatment.
Eye Teaming
Trouble aiming both eyes together up close or far away. The most common form is convergence insufficiency. (Vergence disorders.)
Focusing
Trouble focusing up close, holding focus, or shifting focus from board to desk. (Accommodative disorders.)
Eye Tracking
Trouble moving the eyes accurately along a line of print or following a moving object. (Oculomotor dysfunction.)
Eye Alignment
Small or intermittent misalignments the brain struggles to control, up to a visible eye turn. (Phorias and strabismus.)
What It Can Feel Like
Fine at First, Then the Page Fights Back
The telltale pattern of BVD is that symptoms build with visual effort. The first few minutes of reading feel normal. As the eyes tire, words start to shadow, blur, or drift, and the reader slows down, loses their place, or simply stops. Children rarely complain, because they assume everyone sees this way.
What to Watch For
Signs & Symptoms
These are most meaningful when they show up during or after visual work — reading, screens, driving, busy visual environments — and ease when the eyes rest.
- Headaches or eye strain with reading or screens
- Double vision, or words that move, blur, or "swim"
- Losing place, skipping lines, re-reading
- Slow reading or comprehension that fades as reading goes on
- Covering or closing one eye to read
- Avoiding reading, homework, or near work
- Fatigue or sleepiness during visual tasks
- Trouble copying from the board
- Discomfort in busy visual places, like stores or traffic
- New visual symptoms after a concussion
A Straight Answer
"I Saw a Video About BVD…"
Many families find us after watching a video online: someone puts on a new pair of glasses or finishes a program, and headaches, dizziness, anxiety, or reading trouble seem to disappear. Those stories can be real. But a video can't tell you whether your symptoms come from your vision.
Headaches, dizziness, trouble concentrating, and reading difficulty all have many possible causes. BVD is one of them. So are migraine, inner-ear problems, anxiety, sleep problems, ADHD, dyslexia, medication side effects, and other medical conditions. Often more than one thing is going on at once.
That's why we don't treat symptoms based on a checklist or a video. We measure how your eyes actually work. If BVD is part of the picture, we'll show you the findings and explain what treatment can realistically change. If it isn't, we'll tell you that too.
Is This Right for You?
Who BVD Treatment Is For — and Who It Isn't
We'd rather tell you up front than have you invest time and money in the wrong treatment.
BVD treatment may help if…
- Your symptoms show up or get worse with reading, screens, or close work, and ease with rest
- You or your child has been told "your eyes are fine," but visual tasks are still a struggle
- A child reads well in short bursts but fades, skips lines, or avoids reading
- Visual symptoms started or lingered after a concussion
- Glasses alone haven't solved the problem
- An evaluation confirms a measurable eye teaming, focusing, or tracking problem
- The patient can participate in activities and the family can commit to regular sessions and home practice over several months
BVD treatment is not the answer if…
- Your symptoms happen no matter what you're looking at, including with eyes closed or at rest
- Dizziness or vertigo comes mainly from head position or movement, which points to the inner ear first
- You're hoping it will treat dyslexia, ADHD, autism, or a learning disability on its own. It can treat vision problems that exist alongside them, but not the conditions themselves
- You're looking for a treatment for anxiety, depression, or a migraine disorder
- The evaluation doesn't find a binocular vision problem. Then therapy won't help, and we'll say so
- You want a quick fix. Therapy builds skills over months, and results depend on consistent participation
Get medical care first
Sudden double vision, a new eye turn, sudden vision loss, a severe or "worst ever" headache, weakness, numbness, slurred speech, or a recent head injury with worsening symptoms needs emergency medical attention — call 911 or go to the ER. Don't wait for a vision therapy evaluation.
Sorting It Out
Is It My Vision — or Something Else?
Patterns aren't a diagnosis, but they help point in the right direction.
Points toward vision
Symptoms tied to visual tasks. Headaches that start partway through reading or homework. Words that blur or double up close. Fatigue that gets worse through the school or workday. Relief when you close your eyes or look away into the distance.
Points somewhere else first
Symptoms that wake you up, come in sudden attacks, or show up regardless of what you're doing. Spinning dizziness when you roll over in bed. Reading trouble that stays the same even when the print is large and comfortable. Attention problems that show up equally in listening tasks.
Many patients have both: for example, a child with dyslexia and convergence insufficiency. Treating the vision problem removes one obstacle; the child still needs the right reading support for the rest.
Our Approach
How Hope Vision Helps
Evaluate
A Binocular Vision Evaluation with Dr. Allison Toler measures eye teaming, focusing, tracking, and alignment, including RightEye® eye-tracking technology.
Explain
We walk you through what we found and what it means. If BVD isn't the cause, we tell you, and help point you toward the right kind of provider.
Treat
When therapy is recommended, Dr. Toler builds an individualized plan. Glasses or prism may be part of it, alongside one-on-one sessions with a Vision Therapist.
Measure
Regular progress evaluations track real changes in your visual skills, so you can see what's improving and the plan can adjust.
Therapy is offered through our In-Office, At-Home, and Hybrid programs for children, teens, and adults. Hope Vision is a private-pay practice and an approved provider for Florida Empowerment Scholarship (FES-UA) funding. We serve families from Clermont, Orlando, Winter Garden, Minneola, and across Central Florida.
Common Questions
Binocular Vision Dysfunction FAQ
Is BVD a real diagnosis?
Yes. Eye teaming, focusing, and tracking disorders are well-established conditions in optometry, and some, like convergence insufficiency, have been studied in large clinical trials. "BVD" is a broad label for this group, which is why a thorough evaluation matters more than the label itself.
I saw videos of special glasses fixing BVD. Is that what you do?
Prism lenses are one tool, and they can help some patients, especially with certain eye alignment problems. They aren't right for everyone, and they don't build eye teaming, focusing, or tracking skills. Dr. Toler recommends prism only when the evaluation shows it will help, and often alongside therapy.
Can BVD cause dizziness or anxiety?
A visual system working overtime can contribute to discomfort, disorientation, or feeling overwhelmed in busy visual places. But dizziness and anxiety have many causes, and most aren't visual. If your symptoms aren't clearly tied to visual tasks, see your physician first. We're glad to be part of the team when vision is one of the pieces.
Does vision therapy treat dyslexia or ADHD?
No. Vision therapy treats vision problems. Those problems can exist alongside dyslexia or ADHD and make reading and focus harder, so treating them can help — but a child with dyslexia still needs evidence-based reading instruction, and ADHD still needs appropriate care.
My child passed a vision screening. Could they still have BVD?
Yes. Screenings mainly test how clearly each eye sees a chart across the room. Eye teaming, focusing, and tracking at reading distance usually aren't tested, so a child can see 20/20 and still have BVD.
How long does treatment take?
It depends on the type and severity of the problem and on consistency. A typical in-office program is about 22 weekly sessions over roughly six months, with progress evaluations along the way. Your plan is set after your evaluation.
Do you take insurance?
Hope Vision is a private-pay practice. We are an approved provider for Florida Empowerment Scholarship (FES-UA) funding, and payment plans are available for therapy programs. Call us at 352-243-4673 with any questions.
Related Conditions
Learn More
Wondering If It's BVD?
A Binocular Vision Evaluation gives you a clear answer — whether your vision is part of the problem, and what to do next either way.
Questions? Call 352-243-4673