Neuro-Vision Rehabilitation
- Restoring Visual Function After Neurological Events
A stroke, traumatic brain injury, or a diagnosis like cortical visual impairment can change how the brain processes everything it sees - not because the eyes themselves have failed, but because the visual pathways that carry signals to the brain have been disrupted. Our COVD-certified neuro-optometrists in Chennai assess and rehabilitate exactly this: the connection between eyes and brain, using calibrated prism therapy, vision therapy protocols, and coordinated care with neurologists and occupational therapists.
Why Neurological Events Disrupt Vision
The visual system is the largest sensory system in the human brain. Roughly half the cortex is involved in processing visual information - which is why a stroke, traumatic brain injury, or a developmental condition affecting the brain almost always produces some form of visual impairment, even when the eyes themselves are intact.
The disruption can affect any part of the pathway: the optic radiations that carry signals from retina to cortex, the occipital lobe that processes what we see, the parietal regions that tell us where things are in space, or the cerebellum and brainstem circuits that control how the eyes move together. The result is a wide range of symptoms - hemianopia (loss of half the visual field), diplopia (double vision), oculomotor dysfunction (inability to shift gaze accurately), visual neglect, and reading difficulty that patients often describe simply as "my eyes have got worse."
Standard eye tests do not detect most of these problems because they measure visual acuity, not visual function. A full neuro-optometric assessment is required - and that is where we begin.
Neurological Conditions Affecting Vision
Each condition disrupts the visual system differently. Our neuro-optometric team has clinical experience with all of these, and our evaluation protocols are adapted to each.
Post-Stroke Visual Impairment
Stroke disrupts visual processing depending on which hemisphere is affected. The most common presentations we manage are hemianopia, diplopia, oculomotor dysfunction, and visual-spatial disturbance. Rehabilitation uses compensatory scanning training, prism therapy, and eye movement retraining - matched to the lesion pattern on neuroimaging where available.
TBI & Concussion Vision Problems
Traumatic brain injury - including sports concussion - commonly produces convergence insufficiency, accommodative dysfunction, saccadic disruption, and photosensitivity. These are frequently misattributed to anxiety or fatigue. Our TBI vision assessment takes 90–120 minutes and produces a written functional vision report suitable for sharing with neurologists and rehabilitation physicians.
Cortical Visual Impairment (CVI)
CVI is not a problem with the eyes - it is a problem with how the brain interprets visual information. Children with CVI may respond to specific colours but not faces, prefer moving targets over still ones, or show gaze instability in crowded environments. Our CVI assessment uses Roman's CVI Range scoring and direct observation under varied lighting and complexity conditions.
Hemianopia & Visual Field Loss
Loss of half the visual field does not always feel like darkness on one side - many patients describe the affected area as simply "missing" or report bumping into things without understanding why. We use Humphrey automated perimetry to map the field precisely, then train compensatory strategies: systematic saccadic patterns, awareness of the blind side, and environmental adaptations for daily safety.
Cerebral Palsy & Vision
Between 40 and 80 percent of children with cerebral palsy have a visual impairment that affects their ability to engage with therapy, education, and daily tasks. Refractive errors, strabismus, nystagmus, and CVI can all co-occur. Our paediatric neuro-optometric evaluation is adapted for children with physical and communication differences and generates recommendations for their full therapy team.
Primitive Reflex Integration
Retained primitive reflexes - the ATNR, STNR, Moro, and Spinal Galant - interfere with eye movement control, postural stability, and attention. They are common in children with developmental delays and acquired neurological conditions alike. Reflex integration activities are combined with vision therapy when retained reflexes are identified on our neurodevelopmental assessment.
Prism Therapy for Double Vision
Diplopia after stroke or TBI is distressing and significantly limits function. Before committing to strabismus surgery, prism lenses prescribed on a Maddox rod and cover-test baseline can eliminate double vision in most stable cases. We prescribe fresnel prism for early recovery and ground-in prism once the deviation has stabilised - typically by 6 months post-onset.
Vision Rehabilitation - Elderly Patients
Age-related neurological change, macular degeneration, and multi-system conditions combine in older patients to create complex vision profiles. We provide eccentric viewing training, low-vision aids assessment, and environmental modification recommendations. Our clinic is accredited for low-vision rehabilitation and works with ophthalmologists, geriatricians, and occupational therapists on joint care plans.
Symptoms That Warrant a Neuro-Vision Evaluation
Many of these symptoms are reported to neurologists and GPs, but because they do not show on MRI or standard eye tests, patients are often told there is nothing to be found. A functional neuro-optometric assessment picks up what those tests miss.
Visual Symptoms
- Double vision - constant or intermittent
- Blurred vision that a new glasses prescription has not resolved
- Difficulty reading - losing place, letters moving, words running together
- Sensitivity to light (photophobia), especially in bright or fluorescent environments
- Peripheral field loss - bumping into objects, missing things on one side
- Visual disturbances - flashes, trailing images, shimmering
Functional Symptoms
- Dizziness or balance problems triggered by visual movement (busy environments, scrolling screens)
- Difficulty judging distances - misjudging steps, kerbs, doorframes
- Ignoring objects or people consistently on one side (visual neglect)
- Fatigue after reading or screen use that wasn't present before the neurological event
- Difficulty driving - missing vehicles approaching from one side
In Children (CVI & CP)
- Responds to single objects but loses interest in complex scenes or crowded pages
- Prefers specific colours; responds to bright or moving stimuli more than still ones
- Difficulty making eye contact in busy environments but engages well one-to-one
- Gaze instability - looks away from objects of interest before locking on
- Visual latency - a noticeable delay before responding to something new in the visual field
How Neuro-Vision Rehabilitation Works at Our Clinic
Every patient begins with a full neuro-optometric evaluation. Treatment follows from those findings - not from a generic protocol. Here is what the journey typically looks like for an adult patient recovering from stroke or TBI.
We measure visual acuity at distance and near, refractive error, ocular alignment with cover test and Maddox rod, convergence and divergence ranges, pursuits and saccades using the King-Devick and Developmental Eye Movement (DEM) tests, contrast sensitivity, visual field with confrontation testing and Humphrey perimetry where indicated, and CVI Range scoring for paediatric patients. We also record near-point of convergence (NPC) and stereoacuity. The result is a written clinical report - not just verbal feedback.
We meet with the patient and family to explain exactly what the evaluation found - in plain language, with diagrams where helpful. We set rehabilitation goals around the patient's actual daily activities: returning to work, being able to read independently again, managing steps and kerbs safely. These goals are documented, and we share a copy of the evaluation report with the patient's neurologist or rehabilitation physician on request.
Where diplopia or visual midline shift syndrome is present, we prescribe fresnel prism or ground-in prism lenses as a first intervention. Prism does not restore the underlying deficit - but it resolves the functional symptom (double vision, spatial distortion) while rehabilitation is underway, and allows the patient to function safely. We review prism prescriptions every 6–8 weeks as recovery progresses.
In-clinic sessions run for 45–60 minutes, once or twice per week, typically over 12–24 weeks depending on the severity and complexity of the deficit. Activities are selected from our clinical protocol and adapted session by session: saccadic scanning training on a computerised system, Brock string for vergence control, Hart chart and jump vergence for convergence, field awareness exercises, and vestibular-visual integration tasks for patients with visually-triggered dizziness. We document performance measurements each session so progress is transparent.
On completion of the programme, we produce a discharge report documenting the change in measurements from baseline and the functional outcomes achieved. Patients who have reached plateau receive a home maintenance programme. Follow-up appointments are scheduled at 3 and 6 months. For patients with degenerative conditions or evolving neurological status, we recommend an annual neuro-optometric review to monitor for change and adjust interventions accordingly.
Find the Right Page for Your Condition
Use these links to go directly to the condition or treatment most relevant to you. Each page has its own clinical detail, FAQ section, and a direct booking link.
Questions About Neuro-Vision Rehabilitation
What is neuro-vision rehabilitation and how is it different from regular vision therapy?
Standard vision therapy addresses developmental conditions - convergence insufficiency, amblyopia, tracking problems - where the visual system was never functioning correctly. Neuro-vision rehabilitation addresses acquired deficits: visual problems that began after a neurological event (stroke, TBI, surgery) or that arise from a neurological condition (CVI, cerebral palsy). The difference matters clinically because the assessment tools, treatment protocols, and expected outcomes are different. Neuro-optometry also involves closer coordination with neurologists, rehabilitation physicians, and occupational therapists than paediatric vision therapy does. Both are delivered by the same COVD-certified team at our clinic, but they are not interchangeable programmes.
Can vision actually recover after a stroke? I thought the damage was permanent.
Some visual recovery happens spontaneously in the first 3–6 months after stroke through a process called neural plasticity - the brain reroutes signals around damaged areas. Neuro-vision rehabilitation works with that plasticity window and also beyond it. For hemianopia specifically, the damaged visual field rarely restores fully, but compensatory scanning training significantly improves functional independence: patients learn to systematically sweep their gaze into the blind side, dramatically reducing the rate of collisions and missed objects. Diplopia from stroke often resolves more completely - prism therapy provides immediate functional relief, and active rehabilitation of the vergence and oculomotor system can resolve it in a significant proportion of patients within 6–12 months. The critical point is that none of this happens without structured intervention.
How long does a neuro-vision rehabilitation programme take?
The evaluation takes 90–120 minutes. The treatment programme depends on the nature and severity of the deficit. For relatively contained problems - convergence insufficiency after concussion, diplopia from a small cranial nerve palsy - 12–16 weekly sessions is a realistic expectation. For more complex presentations involving field loss, oculomotor dysfunction, and visual neglect together, we typically plan 24–36 sessions over 6–9 months, with formal reassessment at the halfway point to review progress and adjust the programme if needed. Children with CVI are often supported over a longer period - 1–2 years - because CVI rehabilitation is developmental in nature rather than remedial. We give every patient a written programme outline with estimated milestones at the start of treatment, so expectations are clear from day one.
My child has CVI - what does an assessment at your clinic actually involve?
A CVI assessment at our clinic takes 90 minutes and has two parts. In the first part, we observe the child directly across a series of structured tasks: how they respond to isolated objects versus arrays, whether they show colour preference (most CVI children have a strong preference - usually red or yellow), how their visual attention changes in high-complexity environments versus low-complexity ones, and whether there is visual latency (a delay in responding to something new entering the field). We then complete the CVI Range - a structured 10-item scoring tool developed by Christine Roman-Lantzy - which places the child in one of three phases of CVI severity. The second part is a report and recommendations session with the parents, in which we explain the score, what it means for schooling and therapy, and what modifications and activities we recommend to progress the child through the phases. We send a copy of the report to the child's occupational therapist and school coordinator if the family requests it.
I am based outside Chennai - can I still access neuro-vision rehabilitation at your clinic?
Yes. For patients based outside Chennai - including NRI patients visiting from the UAE, UK, USA, or Singapore - we offer an intensive evaluation block: the full neuro-optometric assessment on day one, a prism prescription and fitting if needed, and a written programme that a locally-based occupational therapist or optometrist can support between visits. We supplement this with monthly telehealth review sessions so we can monitor progress and adjust the programme remotely. Many families combine this with a 2-week intensive stay in Chennai for the initial in-clinic sessions. Contact us via WhatsApp to discuss what a remote or intensive programme might look like for your specific situation.