Cortical Visual Impairment (CVI)
Understanding CVI
- Visual responses that vary from moment to moment or day to day
- Difficulty recognizing familiar faces or objects
- Preference for looking at lights or brightly colored objects
- Better vision when looking off to the side rather than directly
- Difficulty seeing in cluttered or busy visual environments
- Delayed response when shown something new
- Visual fatigue leading to shutting down or looking away
- The eyes are typically healthy in CVI
- The problem is in how the brain processes visual information
- Vision can improve with appropriate intervention and environmental changes
- Visual function fluctuates based on fatigue, stress, and environment
- Standard eye exams show healthy eyes
- Inconsistent visual responses are confusing to observe
- Behaviors are attributed to other diagnoses
- Many professionals are unfamiliar with brain-based visual impairment
Possible Causes
- Lack of oxygen before, during, or after birth
- Premature birth affecting brain development
- Stroke or brain injury
- Infections affecting the brain
- Seizure disorders impacting visual areas
- Genetic or structural brain differences
- Cerebral palsy
- Epilepsy and seizure disorders
- Developmental delays
- Autism spectrum disorder
- Hydrocephalus
- Periventricular leukomalacia
- Eye teaming and tracking problems may coexist with CVI
- Focus flexibility issues add to visual fatigue
- Visual-motor integration deficits compound coordination difficulties
- Addressing these functional issues can reduce overall visual strain
The Vision Connection
- Vision accounts for 80 percent of sensory perception
- Unreliable visual processing affects learning, communication, and movement
- The brain works extremely hard to make sense of unclear visual input
- Fewer resources remain for other developmental tasks
- The brain has neuroplasticity and can build new visual pathways
- Environmental modifications reduce visual demands
- Targeted intervention can improve visual function over time
- Progress in vision often supports gains in other developmental areas
- Standard eye exams only check eye health and clarity
- CVI requires assessment of how the brain uses visual information
- Functional vision skills need separate evaluation
- Understanding the full visual picture guides effective intervention
Evaluation and Treatment
- Visual attention and recognition abilities
- Response to different colors, contrast, and movement
- Impact of visual complexity and clutter
- Eye tracking, teaming, and focus skills
- Visual-motor integration
- How vision integrates with other senses
- Individualized programs based on each child's visual abilities
- Treatment adapted to reduce visual complexity and demands
- Activities designed to build visual pathways gradually
- Neuro-visual performance training supports brain-based visual growth
- Intensive in-office programs with remote follow-up
- Reducing visual clutter in the child's surroundings
- Using high contrast and preferred colors
- Presenting objects against plain backgrounds
- Allowing extra time for visual processing
- Controlling lighting to reduce glare and fatigue
- Physical therapy benefits when visual guidance improves
- Occupational therapy gains stronger visual foundations
- Speech therapy improves when visual attention is more reliable
- Educational strategies become more effective with visual accommodations
Questions and Answers
No. Children with CVI can see, but their brain has difficulty interpreting visual information. Vision may be unclear, inconsistent, or overwhelming. Unlike blindness from eye damage, CVI can improve with appropriate intervention because the brain can build new pathways.
Yes. The brain has neuroplasticity, meaning it can form new connections and adapt. Many children with CVI show significant improvement with targeted intervention, environmental modifications, and consistent support. Progress varies based on each child's unique situation.
Fluctuating vision is a hallmark of CVI. Visual function can change based on fatigue, illness, stress, complexity of the environment, and familiarity with what is being viewed. This inconsistency does not mean your child is choosing not to look. It reflects how their brain processes visual information.
CVI is diagnosed through comprehensive evaluation that includes medical history, observation of visual behaviors, and assessment of how the child responds to different visual conditions. A developmental vision evaluation adds information about functional visual skills. Input from multiple specialists often helps build the full picture.
Yes. Vision therapy supports the development of functional visual skills by building new brain pathways. It does not repair brain damage but helps maximize the visual potential your child has. Many families see meaningful improvements in visual function and daily living skills.
Reduce visual clutter in your child's environment. Use high contrast colors and present objects against plain backgrounds. Allow extra time for your child to process what they see. Pay attention to lighting and reduce glare. Work with your child's vision care team to learn specific strategies for your child.
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