The Missing Piece in Your Patients' Recovery
Your patient works hard. Shows up consistently. Makes real progress in therapy, then hits a wall. Balance plateaus. Coordination stays inconsistent. They report brain fog, headaches, or fatigue that physical effort alone doesn't explain. We are the bridge between the visual-neurological system your patients need treated and the motor recovery you are building.
Why Vision Matters to Every PT Patient
70–90% of brain pathways are involved in vision. The ambient visual system, the unconscious system that governs spatial orientation, balance, and movement precision, is the first system disrupted by acquired brain injury and the last to recover. Yet in most concussion and neuro-rehab protocols, it is never assessed.
Sight (Acuity) measures whether the eye can focus light clearly (20/20). It is tested by a standard eye exam (Snellen chart). The PT analogy is measuring grip strength only.
Functional Vision measures whether the brain can efficiently use what the eyes see. It is tested by a functional vision assessment covering 17 skills. The PT analogy is a full upper-extremity functional assessment.
A patient can have normal sight and impaired functional vision. 20/20 sight with severe functional deficits is common. This is the most critical point for PT referral decisions.
- Eye tracking: Smoothly following moving objects. Critical for ball sports, driving, reading. Jerky pursuits indicate neurological inefficiency.
- Eye teaming (vergence): Aiming both eyes at the same point in space. Essential for depth perception and balance. Convergence insufficiency is common post-TBI.
- Focusing flexibility: Shifting focus between near and far efficiently. Affects screens, reading, and real-world navigation. Directly impacted by retained STNR.
- Visual-motor integration: Coordinating what the eyes see with what the body does. The foundation of all coordinated movement you train in PT.
- Peripheral / spatial awareness: Processing spatial information in the visual field. Directly tied to balance and spatial orientation. Governed by the ambient visual system.
- Visual processing speed: How quickly the brain interprets visual input. Affects reaction time, safety, and the ability to function in dynamic environments.
- Multisensory integration: Vision coordinating with vestibular and proprioceptive input. The triad you already know, but with vision as the dominant input.
- 3D vision / stereopsis: Depth perception requiring accurate eye teaming. When impaired, patients misjudge distances, steps, curbs, and spatial relationships.
Every brain has a limited pool of processing resources, think of it as a dollar's worth of dimes. When the visual system is inefficient, it consumes 4–6 dimes just to keep the visual world stable. That leaves only 4–6 dimes for everything else, balance, motor control, emotional regulation, and cognitive tasks.
Your patient isn't "not trying hard enough." Their brain is spending 60 cents of every dollar on vision, leaving 40 cents for everything you're training. This is why they can perform in the morning but not the afternoon, in your quiet clinic but not a busy grocery store, and why fatigue seems disproportionate to physical effort.
Vision's Role in Physical Therapy
Start the Conversation
Refer a Patient: Include relevant PT notes and assessment findings, NVPI integrates this into the evaluation. No extensive documentation required.
Schedule a Lunch-and-Learn: Complimentary educational sessions for PT practices. Bring your team, bring your questions. We come to you.
Call to Discuss: Not sure if a patient is appropriate? Call to discuss. No referral required. We are happy to talk through clinical presentations.
Ambient Vision: The System You're Already Treating Around
- Function: What am I looking at? Is it clear?
- Awareness: Conscious
- Governs: Object identification, reading, detail work
- Tested by standard eye exam? Yes
- Disrupted by brain injury? Sometimes
- Relevance to PT: Moderate
- Function: Where am I in space? How do I need to move?
- Awareness: Entirely unconscious
- Governs: Posture, balance, midline, spatial orientation, movement timing
- Tested by standard eye exam? No
- Disrupted by brain injury? Almost always (up to 90% of TBI cases)
- Relevance to PT: Extremely high, directly controls what you are treating
When the ambient system is disrupted, by concussion, stroke, or developmental deficit, the brain receives inaccurate spatial information. The patient's body is healthy enough to balance, but the brain is telling it the wrong information about where "center" is. This presents as the exact postural asymmetries and balance deficits you see daily.
Clinical observation you can do today: Ask the patient to hold a pen at what they perceive as their midline (in front of their nose). If it's consistently off-center, the visual system is providing inaccurate spatial data. Notice head tilts, postural leans, or consistent drift in gait, these may be compensations for a shifted visual midline, not primary musculoskeletal issues.
Real Results for Kids, Adults, and the Experts Who Refer Them
PATIENT STORIES • PROFESSIONAL REFERRALS
Meet a student who jumped two full reading grade levels, an adult who finally overcame a lifetime of anxiety, and the neuroscientist who trusts Dr. Graebe with her own clients.
"My son jumped two full reading grade levels — and finally believes he can do the work."
Miles' Story — A 3rd Grader's Breakthrough in Reading & Confidence
"What I thought was social anxiety was actually a vision problem. Now new places and new people don't faze me."
Jo's Story — Overcoming Motion Sickness, Anxiety & Depth Perception Issues
"As a neuroscientist, I'm 100% confident referring my clients to Dr. Graebe — I watch their vision and confidence transform."
Dr. Brynn Dombroski, Ph.D., M.Ed., BCBA, LBA
Neuroscientist & Referring Clinician
"My son jumped two full reading grade levels — and finally believes he can do the work."
Miles' Story
A 3rd Grader's Breakthrough in Reading & Confidence
"What I thought was social anxiety was actually a vision problem. Now new places and new people don't faze me."
Jo's Story
Overcoming Motion Sickness, Anxiety & Depth Perception Issues
"As a neuroscientist, I'm 100% confident referring my clients to Dr. Graebe — I watch their vision and confidence transform."
Dr. Brynn Dombroski, Ph.D., M.Ed., BCBA, LBA
Neuroscientist & Referring Clinician
The Fourth Leg of Concussion Rehab
Concussion rehabilitation has traditionally stood on three legs: proprioceptive, cognitive, and vestibular. The research is clear that vision is the fourth, and arguably the most impactful. Up to 90% of TBI patients experience visual dysfunction.
- Light sensitivity
- Headaches (especially with reading or screens)
- Dizziness and balance issues
- Brain fog and difficulty concentrating
- Double or blurred vision
- Motion sensitivity
- Depth perception problems
- Difficulty reading (losing place, words moving)
- Eye strain and fatigue
- Visual field loss
- Difficulty with screens
- Balance improves in the clinic but regresses in visually complex environments (grocery stores, busy hallways)
- Persistent headaches that worsen with cognitive or visual load
- Fatigue disproportionate to physical exertion
- Anxiety or avoidance behaviors in crowded or visually busy spaces
- Patient reports feeling "off" or "foggy" despite good objective scores
The precision required for accurate binocular eye tracking makes it the most sensitive neurological skill, it's the first to go offline after brain injury and the last to return. This is why eye tracking is now the gold standard for return-to-play decisions. NVPI provides objective eye-tracking assessments and reports that can be shared with the referring PT.
Beyond Concussion: Other Patient Populations
Post-concussion patients are the most common referral pathway from PT practices, but functional vision deficits affect a wide range of populations you serve.
Stroke affects vision differently than concussion. Patients may present with visual field cuts, spatial neglect, eye movement deficits, or visual-perceptual deficits depending on the area of the brain affected. If your CVA patient is struggling with spatial awareness or functional mobility despite good motor recovery, a functional vision assessment can reveal the missing piece. Stroke is a distinct clinical category, not interchangeable with TBI in terms of visual presentation or treatment approach.
Children with coordination difficulties, balance issues, or motor planning deficits may have underlying visual skill gaps. An estimated 1 in 4 school-aged children has a vision issue affecting learning and movement, and many pass standard vision screenings. The child who is "clumsy" or "uncoordinated" may have a visual-motor integration deficit, not a primary motor issue. Children with known ADHD, autism, or learning disability diagnoses frequently have a vision component that has never been evaluated.
The vestibular, proprioceptive, and visual systems are a triad. Treating two legs without addressing the third produces incomplete results. If a patient's balance improves with eyes closed but not with eyes open, or improves in simple visual environments but not complex ones, the visual system is the variable. This is one of the most reliable clinical indicators for a functional vision referral.
Parkinson's, MS, and other neurological conditions can disrupt the visual system in ways that compound motor symptoms. Visual processing inefficiency adds to the cognitive-motor burden these patients already carry. Lyme disease, chemotherapy effects, radiation effects, and hormonal shifts can also disrupt the visual system, each with its own pattern of involvement.
Some patients develop visual-vestibular mismatch after prolonged immobility, medication effects, or the stress of recovery. If dizziness persists after vestibular causes have been ruled out, a visual system assessment is warranted.
Our Valued Patients
Learn how our personalized vision care has made a lasting difference in the lives of those we’ve helped.
About Dr. Rick Graebe
and NVPI
- 40+ years of clinical experience
- 9,000+ patients treated
- OVDR Fellow
- 1 of only 24 OMST practices worldwide
Dr. Rick Graebe, O.D., FCOVD, has over 40 years of clinical experience and has treated more than 9,000 patients. He is a Fellow of the Optometrists in Vision Development and Rehabilitation (OVDR), one of the only eye doctors in Kentucky with this elite international designation.
Dr. Graebe is board certified in vision therapy, pediatric developmental vision care, and vision rehabilitation. He is concussion certified and recognized by the College of Optometrists in Vision Development (COVD).
This is not a formal assessment, just a quick flag for referral. If any of these raise a concern, refer for a full functional vision assessment at NVPI.
1. Smooth Pursuits: Have the patient track your finger slowly in an H-pattern. Note jerkiness, loss of tracking, head movement compensating for eye movement, or patient discomfort.
2. Convergence: Slowly bring a pen toward the patient's nose. Both eyes should track inward smoothly.
3. Midline Check: Ask the patient to hold a pen at what they perceive as directly in front of their nose, then in front of their belly button. Consistent offset to one side suggests visual midline shift.
4. Observation During Therapy: Watch for head tilts, postural leans, squinting, or frequent blinking during visually demanding tasks.
What Happens When You Refer a Patient
NVPI's program is called Neuro-Visual Performance Training, an integrated approach that combines multiple treatment modalities into one coordinated plan.
- Vision Therapy — Eye teaming, focusing, and tracking exercises that retrain the foundational mechanics of binocular vision. Think of it as "physical therapy for the eyes."
- Multisensory Training — Integrates auditory, vestibular, and proprioceptive inputs with vision. Includes assessment and integration of retained primitive reflexes.
- Perceptual Training — Enhances the brain's ability to interpret visual information: visual memory, visualization, spatial awareness, contrast sensitivity, and processing speed.
- OMST (Oculomotor Skills Training) — Precision training for saccades, pursuits, and fixation stability.
- Syntonics (light therapy) — Specific wavelengths of light to balance the autonomic nervous system and expand functional peripheral vision.
- Balance training — Vestibular-visual-proprioceptive integration exercises, directly complementary to PT balance work.
- Prism lenses — Temporary "training wheels" that redirect visual input while the brain builds new pathways.
Average program duration is 30 weeks with one office session per week and customized home activities. Like physical therapy, neuro-visual training follows a predictable arc:
First Third — Identify what works. Establish the therapeutic approach.
Middle Third — Measurable score changes appear.
Final Third — Embed skills into subconscious automation.
If treatment stops when "scores are good" but before skills are embedded, the patient may need to return. The final third is where lasting neuroplastic change is consolidated.
Collaboration, Not Competition
You receive a detailed assessment report including objective eye-tracking data, functional color field results, and a summary of findings in language relevant to PT treatment planning. NVPI treatment does not replace PT. The two programs are complementary and often run concurrently. Together, the full sensorimotor loop is covered.
Patient: 12-year-old male football player. Three concussions in three consecutive seasons.
PT presentation: Post-concussion balance deficits, persistent headaches. Vestibular rehab produced partial improvement but the patient couldn't clear dynamic balance testing.
What NVPI found: Objective eye-tracking assessment showed severely impaired smooth pursuits and saccades. Every visual input required conscious effort to process.
Outcome: Mid-program eye-tracking showed significant improvement. By program completion, all eye-tracking metrics normalized. The patient cleared dynamic return-to-play testing.
Patient: Male, early 20s. Severe TBI from motor vehicle accident. Had completed 10–12 years of OT and PT.
PT presentation: Patient required a walker. Each step was deliberate and effortful. Functional mobility had plateaued years prior.
What NVPI found: Motor field testing showed dramatic misalignment between where the left eye was actually pointing and where the brain thought the right eye was pointing.
Outcome: After one year of Neuro-Visual Performance Training focused on ambient visual system calibration, motor field alignment improved dramatically. The patient discontinued use of the walker entirely. The brain was now receiving accurate spatial information, which allowed the years of PT motor work to finally be applied functionally.
Patient: 8-year-old female. Gymnast, swimmer. 20/20 eyesight. Only complaint: reading difficulty.
What NVPI found: Functional color field testing revealed severely asymmetric peripheral vision processing. Despite 20/20 acuity, the ambient visual system was providing distorted spatial information.
Outcome: After three weeks of light therapy alone (before any in-office vision therapy): Functional color fields normalized significantly. The patient reported: "The words aren't moving on the page like they used to, and I'm not getting headaches." Functional vision deficits often hide behind other labels. PT alone would have produced limited results for the underlying cause.
When To Think About
A Vision Referral
Consider referring to NVPI when a patient presents with persistent symptoms despite conventional therapy.
Symptoms Persist Beyond Timeline
Balance Improves Eyes Closed Only
Degradation In Complex Environments
Headaches Worsen With Visual Load
Balance Training Plateaus
Postural Asymmetry / Midline Shift
Coordination Deficits Don't Respond
ADHD, Autism, Or Learning Diagnosis
CVA With Spatial Neglect
Anxiety In Busy Environments
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