Post-Concussion Vision Problems: Symptoms, Diagnosis, and Treatment

Concussion is widely understood as a brain injury — but its effects on the visual system are less well known, and frequently undertreated. Vision problems are among the most common sequelae of concussion and traumatic brain injury (TBI), affecting an estimated 50–90% of patients with significant head trauma.

If you or someone you know is struggling with persistent symptoms after a concussion — headaches, dizziness, light sensitivity, difficulty reading — the visual system may be a significant contributor.

The visual system is extraordinarily complex. It involves not just the eyes themselves, but extensive neural pathways that run through virtually every region of the brain. The visual cortex, the superior colliculus, the cerebellum, the brainstem, and the vestibular nuclei are all involved in processing visual information and coordinating eye movements.

When a concussion disrupts neural function — through axonal shearing, inflammation, or altered neurotransmitter activity — these visual pathways are frequently affected. The result is a range of visual dysfunctions that can persist long after the acute phase of injury.

The most common visual consequence of concussion is disruption of binocular vision — the ability of the two eyes to work together as a coordinated team. This can manifest as:

• Convergence insufficiency: Difficulty turning the eyes inward for near work. Reading, screen use, and close tasks produce headaches, eye strain, and blurred or double vision.
• Divergence insufficiency: Difficulty maintaining alignment for distance viewing.
• Vertical misalignment: One eye drifts slightly higher than the other, producing the symptoms of Binocular Vision Dysfunction (BVD) — headaches, dizziness, neck pain, and anxiety.

• Saccadic dysfunction: Difficulty making the rapid eye movements required for reading. Words appear to jump or skip; the reader loses their place frequently.
• Smooth pursuit dysfunction: Difficulty tracking moving objects smoothly. Watching sports, driving, or following movement in a crowd becomes disorienting.
• Fixation instability: Difficulty maintaining steady fixation on a stationary target.

• Accommodative insufficiency: Difficulty focusing at near distances. Reading requires significant effort and produces rapid fatigue.
• Accommodative spasm: The focusing system locks up at a near distance, making distance vision blurry.

Photophobia (light sensitivity) is extremely common after concussion. It can range from mild discomfort in bright environments to severe, debilitating sensitivity that makes normal daily activities impossible. Avulux precision-tinted lenses are specifically designed to filter the wavelengths of light that trigger photophobia and migraine.

Some patients experience visual field defects — areas of reduced or absent vision — after concussion, particularly if the injury involved the occipital lobe or optic pathways.

The visual system uses more than a third of the brain's processing capacity — which is why concussion so frequently disrupts it, and why vision symptoms are among the most persistent barriers to full TBI recovery.

Standard eye exams measure visual acuity and eye health. They do not routinely assess:

• The quality of binocular coordination
• Convergence and divergence function
• Saccadic and smooth pursuit accuracy
• Accommodative function
• The relationship between visual findings and systemic symptoms

A patient can have 20/20 visual acuity and significant post-concussion visual dysfunction simultaneously. This is why many concussion patients are told their eyes are "fine" — when in fact their visual system is significantly impaired.

Evaluation of post-concussion vision problems requires a specialized examination that includes:

• Cover testing for binocular alignment
• Near point of convergence testing (convergence insufficiency)
• Saccadic and smooth pursuit assessment
• Accommodative testing
• Prism trial lenses to assess response to binocular correction
• BVDQ questionnaire to correlate visual findings with symptoms

At Trendsetter Eyewear, Dr. Cynthia Payne performs a comprehensive NeuroVisual evaluation that addresses all of these components.

For patients with post-concussion BVD or vertical misalignment, micro-prism lenses provide optical correction that reduces the demand on the visual system. Many patients experience significant symptom relief within weeks of beginning prism lens wear.

For convergence insufficiency and oculomotor dysfunction, vision therapy — a structured program of exercises designed to improve eye coordination, tracking, and focusing — is the evidence-based treatment of choice. Vision therapy is typically performed in-office with a trained therapist, supplemented by home exercises.

For patients with significant photophobia, Avulux precision-tinted lenses filter the specific wavelengths of light (480nm and 590nm) that are most strongly associated with photophobia and migraine. Clinical studies show that 90% of users report fewer migraines and reduced light sensitivity.

Accommodative dysfunction may be treated with reading glasses, bifocals, or vision therapy exercises targeting the focusing system.

Post-concussion vision recovery varies significantly based on the severity of the injury, the specific visual dysfunctions present, and the timeliness of treatment. Many patients see meaningful improvement within 8–12 weeks of beginning appropriate treatment. Some patients with more severe injuries require longer rehabilitation.

Early intervention is associated with better outcomes. If you have had a concussion and are experiencing persistent visual symptoms, do not wait to seek evaluation.

How long after a concussion can vision problems develop? Vision problems can be present immediately after injury or may become apparent in the days to weeks following the concussion as the acute effects resolve and the patient returns to activities that demand visual performance.

Can vision therapy help post-concussion symptoms? Yes. Vision therapy is the primary treatment for convergence insufficiency and oculomotor dysfunction — two of the most common post-concussion visual problems. It is supported by strong clinical evidence.

Should I see a neurologist or an optometrist for post-concussion vision problems? Both. Neurological evaluation is important after concussion. But neurologists typically do not assess binocular vision function in detail. A NeuroVisual evaluation by a specialized optometrist is a complementary step that addresses the visual component of post-concussion syndrome.

Trendsetter Eyewear is located at 1225 S Fort Apache Rd #145, Summerlin, Las Vegas. Dr. Cynthia Payne is a certified NeuroVisual specialist with extensive experience evaluating and treating post-concussion vision problems.

Contact us online or call (702) 479-5222 to schedule your evaluation.

Related reading:

• Binocular Vision Dysfunction (BVD) — the visual condition most commonly disrupted by concussion
• Prism glasses for headaches — how micro-prism lenses treat post-concussion BVD
• Avulux migraine glasses in Las Vegas — for post-concussion light sensitivity
• Dizziness caused by eyes — the vestibular-visual connection