Traumatic Brain Injury
Understanding Traumatic Brain Injury
A traumatic brain injury occurs when an external force causes damage to the brain. This damage can range from mild, such as a brief change in mental state, to severe, involving extended periods of unconsciousness or memory loss. The brain is a delicate organ, and even a seemingly minor bump can disrupt its function.
Vision processing involves many parts of the brain, so a TBI in almost any location can lead to visual symptoms. The eyes themselves may not be injured, but the brain regions that control eye movement, focusing, and visual interpretation can be affected.
TBIs often result from falls, motor vehicle accidents, sports injuries, and assaults. Anyone can experience a head injury, but certain groups face higher risks. Athletes who play contact sports, older adults who may fall at home, and people who work in construction or other physical jobs are among those most vulnerable.
- Falls are the leading cause of TBI, especially in young children and older adults
- Car, motorcycle, and bicycle accidents account for many moderate to severe injuries
- Sports-related concussions are common in football, soccer, hockey, and boxing
- Military personnel and veterans have elevated TBI rates due to combat and training
- Intimate partner violence is a significant and often under-recognized source of TBI
Concussions are the most common type of TBI and are considered mild brain injuries, though their effects can still be significant. A concussion happens when the brain moves rapidly inside the skull, causing chemical changes and sometimes stretching or damaging brain cells. A contusion is a bruise on the brain tissue itself, often from a direct impact to the head.
Other types include diffuse axonal injuries, where twisting forces tear nerve fibers, and penetrating injuries, where an object breaks through the skull. Each type can create unique patterns of vision problems depending on which brain areas are affected.
The visual system is complex and relies on many brain structures working together smoothly. When a head injury disrupts these connections, you may notice trouble with tasks that once felt automatic. Processing visual information requires coordination between your eyes, the nerves that carry signals, and multiple brain regions.
Even a mild concussion can temporarily scramble these pathways or slow down how quickly your brain interprets what you see. Symptoms might appear right away or develop gradually over days or weeks as you return to normal activities that demand more from your visual system.
Visual Symptoms That May Signal TBI
Seeing two images instead of one, or noticing that objects appear fuzzy or unclear, are among the most common vision complaints after a head injury. Double vision often means the eyes are not working together properly, while blurred vision can signal problems with focusing or damage to the visual pathways in the brain.
These symptoms may come and go or worsen when you are tired or trying to concentrate. If you experience sudden or severe double vision after hitting your head, it is important to seek medical attention promptly. Do not drive or operate machinery if you are seeing double or your vision is unreliable. Wait until the condition is controlled with prism, occlusion, or surgery and you have been medically cleared.
Your eyes normally move smoothly and in sync to follow moving objects or shift from one point to another. After a TBI, you might find that your eyes jump, lag, or feel like they are not moving together. This can make everyday tasks like reading, driving, or watching television frustrating and tiring.
- Difficulty following a moving car or ball with your eyes
- Losing your place frequently when reading across a line of text
- Feeling dizzy or nauseated when your eyes move quickly
- Needing to turn your whole head to look at something instead of just moving your eyes
After concussion, the vestibulo-ocular reflex and visual-vestibular integration commonly contribute to dizziness, nausea, and difficulty with busy environments. We screen for these issues and may refer you for vestibular rehabilitation therapy.
Many TBI patients report that normal lighting feels uncomfortably bright or even painful. This sensitivity, called photophobia, can make it hard to be in sunlight, use computers, or spend time in brightly lit stores or offices. The discomfort may trigger headaches or force you to squint or close your eyes.
Light sensitivity after a head injury often improves over time but may require special management strategies in the meantime. We can help you find solutions that reduce discomfort while your brain heals.
Reading requires your eyes to move precisely, focus clearly at close range, and work as a team. A TBI can disrupt any or all of these skills, making it hard to read for more than a few minutes. You might lose your place, skip lines, or feel that the words are moving or blurring on the page.
Trouble concentrating on visual tasks is not laziness or lack of effort. Your brain is working much harder than before to perform the same activities, which leads to fatigue and frustration. Low-power plus lenses for near, larger print, line guides, and text-to-speech tools can reduce strain while other treatments take effect.
Some vision changes after a head injury require urgent attention. Call emergency services or go to the nearest emergency department immediately for any of the following. Do not drive yourself.
- Sudden partial or complete vision loss
- Pupils that are different sizes or do not react to light
- Severe eye pain or headache with vision changes
- A curtain or shadow blocking part of your vision
- Persistent vomiting along with visual symptoms
- Worsening headache, confusion, slurred speech, or unusual behavior
- Weakness, numbness, imbalance, or difficulty walking
- Seizure or repeated vomiting
- Loss of consciousness or increasing drowsiness
- Severe neck pain after the injury
Sudden, severe vision loss, new neurologic deficits, or rapidly worsening symptoms require urgent medical assessment.
How Our Eye Doctors Evaluate TBI Patients
When you visit us after a head injury, we begin with a detailed conversation about your accident, symptoms, and how your vision problems affect daily life. Understanding the full picture helps us tailor our examination to your specific needs. We will ask about headaches, dizziness, balance issues, and cognitive symptoms in addition to vision complaints.
Our assessment goes far beyond a standard eye chart test. We evaluate multiple aspects of visual function that are often affected by TBI but might be missed in a routine eye exam. We include screening for visual-vestibular interaction using tools such as the vestibular-ocular motor screen and task-based provocation while monitoring symptom change.
We carefully observe how your eyes move and whether they work together as a team. You may be asked to follow a moving target with your eyes, shift your gaze between two points, or track an object moving in different directions. These tests reveal problems with the muscles that control eye movement or the brain areas that coordinate them.
Misalignment of the eyes, even by a small amount, can cause double vision and strain. Special tests help us measure the degree of misalignment and determine the best treatment approach.
Your visual field is the entire area you can see when looking straight ahead, including your side or peripheral vision. Brain injuries can create blind spots or reduce your peripheral awareness, which affects mobility and safety. We test your visual field by having you indicate when you see objects or lights in different locations.
- Confrontation testing, where you respond to our hand movements in your peripheral vision
- Automated perimetry, which uses a machine to map your complete visual field
- Checks for visual neglect, where one side of space is ignored due to brain injury
If testing shows a hemianopia, quadrantanopia, or significant neglect, we discuss safety implications and rehabilitation options. These may include compensatory scanning training, field-expanding prism segments, and referral to low vision services and orientation and mobility specialists. We coordinate with neuro-ophthalmology and your neurology team when imaging or additional evaluation is indicated.
Convergence is the ability of both eyes to turn inward and focus on a near object, such as a book or phone. After a TBI, convergence often becomes weak or inconsistent, making close work uncomfortable. We measure the nearest point where you can keep an object single and clear, and we assess how well your eyes maintain that position.
Focusing ability, or accommodation, allows you to switch between looking at distant and near objects. We test how quickly and accurately your eyes change focus, which is essential for tasks like driving or using a computer.
We examine your pupils to see if they are equal in size and react properly to light. Unequal or sluggish pupils can indicate nerve damage or increased pressure inside the skull. Checking pupil function is an important part of assessing the neurological impact of your injury.
We also look inside your eyes with specialized instruments to check the health of your retina, optic nerve, and blood vessels. Trauma can sometimes cause bleeding, swelling, or other damage that needs monitoring or treatment.
- Traumatic optic neuropathy
- Retinal tears or detachment, commotio retinae, or choroidal rupture
- Hyphema, traumatic iritis, or angle recession glaucoma
- Papilledema suggesting raised intracranial pressure
When warranted, we coordinate urgent neuro-ophthalmology evaluation and neuroimaging.
Treatment Approaches for Vision Problems After TBI
Prescription glasses designed specifically for your post-TBI vision needs can provide significant relief. If you have trouble with eye alignment or double vision, we may recommend prism lenses. Prisms bend light before it enters your eyes, helping the images from each eye line up correctly so you see a single, clear picture.
Some patients benefit from glasses with colored or tinted lenses that reduce light sensitivity and visual discomfort. These are custom selected based on your specific symptoms and environment. You might use different glasses for different activities, such as reading versus computer work.
Temporary Fresnel prisms or partial occlusion, such as Bangerter foils or a patch, can provide short-term relief from double vision while alignment stabilizes. For accommodative insufficiency after TBI, a near add or plus-power reading glasses can reduce strain and improve near clarity. Tints can help with light sensitivity, but very dark lenses should not be worn full time indoors because they may worsen light intolerance. We help you select the least dark option that controls symptoms.
Vision therapy is a personalized program of exercises and activities designed to retrain your visual system after injury. Under the guidance of our eye doctors, you work on improving eye movements, focusing, coordination, and visual processing skills. Sessions may take place in our office and at home. Programs are goal directed and focus on measurable deficits such as convergence, accommodation, saccades, and pursuits.
- Eye tracking exercises to improve smooth and accurate eye movements
- Convergence training to strengthen your ability to use both eyes together for near tasks
- Visual-motor activities that rebuild the connection between what you see and how you move
- Perceptual exercises to enhance how your brain interprets visual information
Evidence supports oculomotor rehabilitation for selected patients. Evidence for higher-order perceptual or cognitive visual training is limited, so we set realistic goals, track objective changes, and adjust or stop therapy if progress plateaus. Therapy is typically performed over weeks to a few months with home reinforcement and symptom-limited progression.
If bright light causes discomfort or headaches, we can offer several solutions. Specialized tinted lenses, either in glasses or as filters for screens, reduce glare and ease visual stress. Some patients find relief with specific tint colors that filter out wavelengths of light that trigger symptoms.
- Prefer non-flickering light sources and high refresh rate displays
- Use screen settings such as dark mode, larger fonts, and reduced motion
- Wear a brimmed hat and consider FL-41 or other clinically selected tints
- Gradually reintroduce light to avoid dark adaptation
- Reserve very dark sunglasses for outdoors or brief indoor use during flares
We also provide guidance on adjusting lighting in your home and workplace. This might include using softer bulbs, adjusting screen brightness, positioning yourself away from windows, or wearing a hat with a brim outdoors. We individualize tint color and density based on your symptoms and response.
If you have a persistent hemianopia or other visual field defect, specialized rehabilitation can improve safety and function. Options include compensatory scanning training to help you search the affected area, field-expanding prism segments that shift peripheral images into your seeing field, and referral to low vision specialists and orientation and mobility services. We work with you to identify the strategies that best fit your daily needs and activity goals.
Visual symptoms after TBI often overlap with vestibular dysfunction and post-traumatic headache or migraine. Dizziness, imbalance, light sensitivity, and motion intolerance may all have both visual and vestibular components. We collaborate with vestibular therapists to address balance and gaze stability and with headache or neurology specialists to manage triggers, graded exposure to symptom-provoking environments, and medication when indicated. A coordinated approach often yields better outcomes than treating vision alone.
Advanced Care and Coordination
Recovery from TBI often requires a team approach. We work closely with neuro-ophthalmology, vestibular physical therapy, occupational therapy, speech-language pathology, neurology or headache specialists, and mental health clinicians when anxiety, PTSD, or mood changes are present. Sharing information helps everyone understand how your vision problems fit into your overall recovery.
We provide detailed reports to your other healthcare providers and welcome input from them about your progress. This collaboration helps us adjust your treatment plan as your needs change during recovery.
Most vision problems after TBI improve with non-surgical treatments, but in specific cases, surgery may be considered. If eye muscle misalignment is severe and does not respond to prisms or therapy, a procedure to adjust the muscle position might be an option. We carefully evaluate whether the benefit outweighs the risks before recommending any surgical approach.
Surgical options include strabismus surgery for stable eye misalignment and, when indicated, orbital fracture repair. Suspected traumatic optic neuropathy requires neuro-ophthalmology input; high-dose steroids are not routinely recommended given uncertain benefit and potential risks. Advanced interventions are reserved for situations where conservative treatments have not provided adequate relief and the vision problem significantly affects your safety or quality of life. Any surgical decision is made in close consultation with you and your entire medical team.
Recovery, Self-Care, and Long-Term Management
Recovery from vision problems after TBI varies widely from person to person. Some people notice gradual improvement over weeks to months, while others may experience a longer or more uneven path. Progress is often not linear, meaning you might have good days and challenging days as your brain heals.
It is normal to feel frustrated or worried when symptoms persist, but many patients continue to improve well beyond the first few months after injury. If symptoms that limit function persist beyond about 4 to 6 weeks, a targeted rehabilitation plan and multidisciplinary review are recommended. Staying engaged with your treatment plan and keeping us informed about changes in your symptoms helps us support your recovery effectively.
Giving your brain time to rest is crucial in the early stages of recovery. Visual tasks demand significant brain resources, so regular breaks can prevent symptom flare-ups and reduce fatigue. We recommend following the 20-20-20 rule: every 20 minutes, look at something 20 feet away for at least 20 seconds. Use a symptom-limited, graded return-to-learn and return-to-work plan.
- Limit screen time and take frequent breaks during reading or computer use
- Avoid visually demanding activities when you are tired or experiencing symptoms
- Gradually increase the difficulty and duration of visual tasks as you improve
- Listen to your body and rest when you notice headaches, eye strain, or blurred vision developing
Avoid driving, climbing, or operating machinery while you have active diplopia, disabling dizziness, or unpredictable visual episodes.
In addition to any formal vision therapy program, simple exercises at home can support your healing. We will teach you specific activities tailored to your needs, which might include tracking a moving object, practicing shifting focus between near and far targets, or working on eye-hand coordination tasks.
Consistency is more important than intensity. Doing a few minutes of exercises several times a day is better than one long, exhausting session. Keep a log of your activities and any symptoms you notice so we can adjust your home program at follow-up visits.
Follow a symptom-threshold approach. Keep symptom increases to mild levels, pause if symptoms escalate, and resume at a lower intensity. Home exercises should be prescribed and progressed by your clinician.
Making changes to your surroundings can reduce visual stress and help you function better during recovery. Organize your workspace to minimize clutter and visual distractions. Position your computer screen at an appropriate distance and angle, and ensure lighting is adequate but not harsh.
- Use high refresh rate monitors and reduce screen flicker
- Enable dark mode and reduce on-screen motion or animations
- Increase text size and line spacing, and use line guides
- Consider text-to-speech or audiobooks for longer reading
At home, you might use lamps instead of overhead lights, install dimmer switches, or apply anti-glare filters to screens. Small adjustments can make a big difference in how comfortable your eyes feel throughout the day.
Returning to normal activities after TBI requires careful planning and attention to safety. The following guidelines help protect you and others during recovery.
- Do not drive with diplopia or significant field loss until cleared by your eye doctor
- Consider workplace or school accommodations such as extra time, modified lighting, or reduced visual workload
- Limit visually complex environments early in recovery and increase exposure gradually
- Follow state laws and medical guidance on driving after TBI
- Inform your employer or school about your injury so they can support your return plan
Regular follow-up visits allow us to track your progress and modify your treatment plan as needed. We will reassess your visual function, discuss any new or changing symptoms, and celebrate improvements. Some patients need only a few visits, while others benefit from longer-term monitoring. We typically reassess within 4 to 6 weeks initially, sooner if symptoms worsen, with escalation to additional testing or referral for new field loss, optic nerve changes, or progressive diplopia.
Keep us informed if you experience setbacks, develop new symptoms, or have questions between appointments. We are here to support you throughout your entire recovery journey, and staying in communication helps us provide the best possible care.
Frequently Asked Questions
Yes, even concussions labeled as mild can lead to vision issues that persist for weeks, months, or longer. The term mild refers to the initial injury severity, not necessarily the duration or impact of symptoms. Most people recover fully, but some continue to experience visual difficulties that benefit from ongoing treatment and support.
If you have any concerning vision symptoms after hitting your head, such as double vision, blurred vision, or light sensitivity, schedule an eye exam as soon as possible. Early evaluation helps identify problems that need immediate attention and establishes a baseline for monitoring your recovery. Even if your symptoms seem minor, an assessment can provide peace of mind and guide your healing process.
Vision therapy can lead to significant improvement and sometimes complete resolution of visual symptoms after TBI, but results depend on the nature and severity of your injury. Many patients experience meaningful gains in eye movement control, focusing ability, and visual comfort. The goal is to restore the best possible visual function and reduce the impact of symptoms on your daily life, even if some challenges remain.
Children and adults can experience similar types of vision problems after TBI, but children may have more difficulty describing their symptoms. Younger patients might show changes in behavior, school performance, or interest in activities rather than reporting specific visual complaints. Children also have developing visual systems, which can mean both unique vulnerabilities and greater potential for recovery with appropriate intervention.
Worsening symptoms after an initial period of stability should prompt a prompt reevaluation. While some fluctuation is normal during recovery, a clear decline could indicate a new issue or complication that needs attention. Contact our office if you notice your vision deteriorating, new symptoms developing, or a significant change in how your eyes feel or function. We can determine whether adjustments to your treatment are needed or if additional testing is warranted.
Do not drive if you have double vision, significant field loss, disabling light sensitivity, or dizziness. Your eye doctor will advise when it is safe to resume driving based on testing and symptom control.
Traumatic optic neuropathy is injury to the optic nerve from head or orbital trauma. It requires urgent evaluation by neuro-ophthalmology. Management is individualized and routine high-dose steroids are not recommended due to uncertain benefit.
Tints can reduce discomfort for some people, but they are not a cure. We select the lightest effective tint and recommend graded light exposure. Outcomes vary.
Getting Help for Traumatic Brain Injury
If you or a loved one has experienced a head injury and are noticing vision problems, our eye doctors are here to help. We understand the challenges that come with TBI-related visual symptoms and offer comprehensive evaluation and personalized treatment. Reaching out for specialized eye care is an important step toward recovery and regaining the visual function you need for the activities that matter most to you.