The Short Answer Educational content only. Any suspected concussion warrants medical evaluation. Persistent sensory symptoms after concussion warrant assessment by the appropriate specialist, an audiologist or ENT for hearing and sound symptoms, a neuro-optometrist or ophthalmologist for visual and eye symptoms, and a physician or neurologist to coordinate care. Consult a concussion-experienced clinician for individualized care. Dry eye syndrome develops after concussion because the injury disrupts the autonomic and trigeminal control of tear production and blinking, and because reduced, incomplete blinking during screen use lets the tear film break down (Silverberg et al., 2020). The eye stays comfortable through a stable tear film that is refreshed by regular, complete blinks and maintained by autonomic and trigeminal nerve signals. Concussion disrupts this control, reducing tear quality and blink function, and post-concussion screen use and visual strain further reduce blinking. The tear film breaks down, and the eye surface becomes dry, producing burning, grittiness, watering, and tired eyes. Because dry eye feeds visual strain and headache, treating it with tear support, blink retraining, and screen habits improves comfort and eases other post-concussion visual symptoms. The tear film keeps the eye comfortable and depends on blinking and nerve control. Concussion disrupts tear control and blinking, and screens reduce blinking further. Treating dry eye eases visual strain and headache as well as eye discomfort. What Dry Eye Syndrome Is Dry eye syndrome is a condition in which the tear film that coats and protects the eye surface is inadequate, either because too few or poor-quality tears are produced or because the tears evaporate too quickly. The result, despite the name, is often a paradoxical mix of dryness and reflex watering: burning, stinging, grittiness or a feeling of something in the eye, redness, fluctuating or blurred vision, tired eyes, and sometimes excessive tearing as the eye reacts to the dryness. Symptoms typically worsen with visual tasks like screens and reading, in dry or windy environments, and as the day goes on. How Concussion Disrupts Tear Control and Blinking A stable tear film depends on several things concussion can disrupt. Tear production and the tear film are regulated by the autonomic nervous system and by the trigeminal nerve, which supplies the eye surface and drives reflex tearing and blinking. Concussion commonly causes autonomic dysregulation and can affect trigeminal function, altering both the quantity and quality of tears and the reflexes that maintain the tear film. Blinking is equally important, because each complete blink spreads a fresh tear film and stimulates the glands that supply it. Concussion can reduce the rate and completeness of blinking, and this problem is greatly magnified by screens. During concentrated visual tasks, everyone blinks less and less completely, and after concussion, when screen use is often part of daily life and visual strain is high, this reduced blinking lets the tear film dry out and break down. The combination of disrupted nerve control and reduced blinking produces the dry eye. Why Dry Eye Matters Beyond the Eye Dry eye is not only uncomfortable, it amplifies other post-concussion visual symptoms. A poor tear film blurs and destabilizes vision, which increases the effort of focusing and reading and worsens visual strain and the headaches that come with it. The discomfort adds to sensory load and light sensitivity. Because dry eye feeds this cycle, it is often an overlooked contributor to post-concussion visual difficulty and headache, and treating it can produce improvement out of proportion to the eye symptoms alone. This is why dry eye is worth identifying and treating rather than dismissing as a minor issue. Symptom Presentation Burning, stinging, or gritty eyes, or a feeling of something in the eye Fluctuating or blurred vision that clears with blinking Paradoxical watering as the eye reacts to dryness Tired, heavy eyes worsening with screens and reading Redness and light sensitivity Worsening through the day and in dry or windy conditions Contribution to visual strain and headache Assessment A neuro-optometrist or ophthalmologist assesses dry eye by examining the tear film, the eye surface, and the blink pattern, and measuring tear quantity and quality and how quickly the tear film breaks down. The assessment identifies whether the problem is reduced tear production, rapid evaporation, or incomplete blinking, since these guide treatment, and it places the dry eye in the context of the broader post-concussion visual picture, including focusing and eye-teaming problems and light sensitivity that often coexist. A physician considers the autonomic contribution. Treatment Approach Tear support relieves the surface. Lubricating eye drops used regularly, and thicker gels or ointments for nighttime, replace and stabilize the tear film, and preservative-free drops suit frequent use. Managing the environment, humidifying dry air, avoiding direct drafts, and reducing wind exposure, limits evaporation. Blink retraining and screen habits address the cause. Consciously blinking fully and regularly during visual tasks, and following a schedule of frequent visual breaks, restores the tear film that concentrated screen use depletes. Positioning screens lower so the eyes are less wide open reduces evaporation. Because the autonomic nervous system regulates tearing, autonomic regulation through diaphragmatic breathing and graded activity supports tear control, and treating the broader post-concussion picture helps. Where dry eye coexists with focusing and eye-teaming problems, a neuro-optometrist addresses these together, since relieving the dry eye reduces the visual strain and headache they cause. Sensory symptoms after concussion improve faster when the nervous system is regulated and the neck and autonomic system are addressed alongside specialist care. Start your 3-day free trial to build a supportive daily routine. Supporting Mobility Routine JME 155 Diaphragmatic breathing lowers the sympathetic drive that amplifies sensory sensitivity and steadies the nervous system. Ten slow breaths, several times daily. JME 14 Chin tucks reduce upper cervical tension that feeds headache, dizziness, and sensory overload. Ten repetitions with 5-second holds. JME 1 Cervical rotation restores segmental mobility and supports blood flow through the vertebral arteries to the brain. Ten repetitions per direction. JME 15 Cervical lateral flexion addresses side-bending restriction that sustains neck tension and sensory strain. Ten repetitions per side. JME 16 Cervical flexion and extension restore sagittal mobility restricted by suboccipital guarding. Eight slow repetitions. JME 2 Cervical retraction reinforces a neutral head position that reduces the postural strain feeding sensory symptoms. Ten repetitions per set. JME 150 Thoracic rotation restores mid-back motion needed for full diaphragmatic breathing and relaxed upright posture. Eight repetitions per direction. JME 227 Overhead reach opens the thoracic spine and rib cage, supporting the deep breathing that calms an overloaded nervous system. Ten repetitions with controlled tempo. Start your 3-day free trial for joint-specific mobility programming that supports the nervous system regulation behind sensory recovery after concussion. Common Mistakes Dismissing dry eye as minor when it feeds visual strain and headache Ignoring reduced and incomplete blinking during screen use Using drops without addressing blink habits and screen breaks Overlooking the autonomic contribution to tear control Treating dry eye in isolation from coexisting focusing and eye-teaming problems Progression Assessment examines the tear film, eye surface, and blink pattern and places the dry eye in the broader visual picture. Treatment combines tear support, environmental management, blink retraining, and screen habits, with autonomic regulation for tear control. Relieving the dry eye reduces visual strain and headache, and it improves over weeks as blinking and tear control are restored and the broader picture is addressed. Why did I develop dry eyes after a concussion? Concussion disrupts the autonomic and trigeminal control of tear production and the reflexes that maintain the tear film, and it can reduce the rate and completeness of blinking. Post-concussion screen use and visual strain reduce blinking further, so the tear film breaks down and the eye surface dries out. Why do my eyes water if they are dry? When the tear film is unstable and the eye surface dries, the eye reacts with reflex watering, producing a paradoxical mix of dryness and tearing. The reflex tears are poor at coating the eye, so they overflow without relieving the dryness. This is a common feature of dry eye rather than a contradiction. How does dry eye affect my other post-concussion symptoms? A poor tear film blurs and destabilizes vision, which increases the effort of focusing and reading and worsens visual strain and headache, and the discomfort adds to sensory load and light sensitivity. Because dry eye feeds this cycle, treating it can improve visual strain and headache out of proportion to the eye symptoms alone. How is post-concussion dry eye treated? Treatment combines regular lubricating drops and nighttime gels, environmental measures to limit evaporation, and blink retraining with frequent screen breaks to restore the tear film. Autonomic regulation supports tear control, and coexisting focusing and eye-teaming problems are addressed by a neuro-optometrist, since relieving dry eye reduces the strain they cause. Will dry eye go away after a concussion? It generally improves over weeks as blinking and tear control are restored and screen habits improve, and as the broader post-concussion picture recovers. Tear support, blink retraining, and autonomic regulation speed the process. Persistent dry eye warrants assessment by a neuro-optometrist or ophthalmologist. Why Sensory Symptoms Happen After Concussion Sensory symptoms after concussion arise from disrupted sensory processing rather than damage to the sense organs alone. Concussion strains the connections between brain regions, alters the balance of excitation and inhibition, and leaves the nervous system in a sensitized, hyperexcitable state (Silverberg et al., 2020). In this state the brain turns up the gain on incoming signals, so ordinary light, sound, smell, taste, and touch are amplified, distorted, or perceived when absent. Some symptoms also reflect direct injury to sensory nerves. Most sensory symptoms improve over weeks to months as the brain recovers and the gain settles, and structured management speeds the process. Graded Exposure and Avoiding Overprotection A common trap in sensory recovery is total avoidance. Completely shielding from light, sound, or activity feels protective, but sustained avoidance makes the nervous system more sensitive over time, narrowing tolerance further. The better approach is graded exposure: staying within a tolerable range while gradually and deliberately increasing exposure as tolerance grows, never pushing far past the point where symptoms flare. This retrains the nervous system to accept normal sensory input. Extreme protection, such as constant dark glasses indoors or continuous earplug use, tends to worsen sensitivity and is used sparingly and strategically rather than continuously. Managing Sensory Overload Reduce competing sensory input by handling one channel at a time Take planned breaks in a calm, low-stimulation environment before overload builds Use diaphragmatic breathing to lower the arousal that amplifies sensitivity Pace demanding sensory environments rather than avoiding them entirely Protect sleep, since fatigue lowers sensory tolerance Treat coexisting headache, since pain and sensory sensitivity feed each other When to Seek Specialist Assessment Persistent or worsening sensory symptoms, symptoms that interfere with work or daily life, and any symptom with concerning features warrant specialist assessment. Hearing and sound symptoms are evaluated by an audiologist or ENT, who can test hearing and guide sound therapy. Visual and eye symptoms are evaluated by a neuro-optometrist or ophthalmologist. Smell and taste symptoms are evaluated by an ENT. A physician or neurologist coordinates care and excludes other causes. Pulsatile tinnitus, sudden vision or hearing loss, and rapidly worsening symptoms need prompt evaluation rather than watchful waiting. The Autonomic and Cervical Contribution Sensory symptoms rarely stand alone after concussion. Autonomic dysregulation keeps the nervous system in a heightened, sympathetic-dominant state that amplifies sensitivity, and cervical dysfunction feeds headache, dizziness, and sensory strain through shared brainstem pathways. Regulating the autonomic nervous system with diaphragmatic breathing and graded activity, and addressing the neck with mobility and manual therapy, lower the background arousal on which sensory symptoms ride. This is why calming the nervous system as a whole often eases sensory symptoms that specialist treatment alone does not fully resolve. References Patricios, J. S., et al. (2023). Consensus statement on concussion in sport: the 6th International Conference on Concussion in Sport, Amsterdam, October 2022. British Journal of Sports Medicine, 57(11), 695-711. PubMed Silverberg, N. D., et al. (2020). Management of concussion and mild traumatic brain injury: a synthesis of practice guidelines. Archives of Physical Medicine and Rehabilitation, 101(2), 382-393. PubMed