My CT Scan Was Normal. Why Do I Still Have Vision Problems After a Concussion?
"My CT scan was normal, so why do I still have headaches, blurred vision, and trouble reading?"
This is a common question after a concussion.
A normal CT scan is reassuring, but it does not rule out a concussion or concussion-related vision problems. CT scans are primarily used to identify serious structural injuries such as brain bleeding, skull fractures, or swelling. A concussion can affect how the brain functions without causing changes that appear on a CT scan.
This means you can have a normal CT scan and still experience headaches, dizziness, blurred vision, light sensitivity, difficulty reading, or trouble concentrating.
How Can a Concussion Affect Vision?
Vision depends on more than healthy eyes. Your brain processes the information your eyes receive and controls eye movements, focusing, and how both eyes work together.
After a concussion, these visual systems can become disrupted. This can make everyday activities such as reading, computer work, driving, or navigating busy environments more difficult.
Common Vision Symptoms After a Concussion
Blurred or double vision
Headaches while reading or using screens
Difficulty reading or losing your place
Light sensitivity
Eye strain or fatigue
Difficulty focusing
Dizziness or motion sensitivity
Difficulty concentrating during visual tasks
Why 20/20 Vision Doesn't Tell the Whole Story
A standard eye chart measures how clearly you can see letters at a specific distance. It does not fully evaluate how well your eyes move, focus, or work together.
As a result, you can have 20/20 vision and still have problems with your visual system.
A more detailed assessment can evaluate eye alignment, focusing, eye movements, binocular vision, depth perception, and visual function during tasks such as reading.
Neuro-Optometric Assessment After a Concussion
A Neuro-Optometric Assessment provides a detailed evaluation of the visual system following a concussion or other neurological injury.
Testing focuses on how well your eyes and brain work together, including:
Eye movements and tracking
Focusing ability
Binocular vision and eye teaming
Depth perception
Visual processing
Visual symptoms during near tasks
Identifying visual dysfunction provides important information about symptoms such as headaches, blurred or double vision, dizziness, reading difficulties, and visual fatigue.
When Should You Have Your Vision Evaluated?
If vision symptoms continue after a concussion or interfere with your daily activities, a Comprehensive Eye Exam or Neuro-Optometric Assessment is an important next step.
Consider an assessment if you experience:
Persistent blurred or double vision
Headaches while reading
Increased light sensitivity
Eye strain or visual fatigue
Difficulty focusing or reading
Dizziness during visual activities
Difficulty concentrating
Your eye care professional can determine how your visual system is functioning and recommend the appropriate next steps.
What Can You Do During Recovery?
Follow the recovery plan provided by your physician and healthcare team. Adequate rest, gradual return to activities, regular screen breaks, and avoiding activities that significantly worsen symptoms can support recovery.
Persistent symptoms deserve attention, even when your CT scan was normal.
Frequently Asked Questions
Can I still have a concussion if my CT scan was normal?
Yes. CT scans detect many serious structural injuries, but a concussion can affect brain function without appearing on a CT scan.
Can a concussion cause vision problems?
Yes. A concussion can affect eye movements, focusing, binocular vision, and visual processing, resulting in symptoms such as blurred vision, headaches, dizziness, and reading difficulty.
Can I have vision problems even if I see 20/20?
Yes. 20/20 vision measures visual clarity but does not fully assess how the eyes and brain work together.
How long do concussion-related vision symptoms last?
Recovery varies. If symptoms continue or interfere with your daily activities, a detailed eye assessment can help identify visual problems that require attention.
Don't Ignore Persistent Vision Problems After a Concussion
A normal CT scan is reassuring, but it does not explain every symptom that can occur after a concussion.
If your vision feels different after a head injury, a detailed evaluation can help determine whether your visual system is contributing to your symptoms.
At LivingHope Vision Clinic in Hamilton and Burlington, we provide Comprehensive Eye Exams and Neuro-Optometric Assessments, including Eye Movement and Binocular Vision testing, for patients experiencing visual symptoms following concussion.
If you're experiencing persistent vision problems after a concussion, book an assessment with our team.
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