Is It Dyslexia… or a Vision Problem? Understanding the Difference and Why Both Matter
If your child hates reading, skips lines, loses their place, or comes home exhausted after school, you may have wondered:
“Does my child have dyslexia?”
It’s an important question and one that many parents spend months or even years trying to answer.
The truth is that dyslexia and vision problems can look surprisingly similar, and many children with reading difficulties are never evaluated for the visual skills needed to read comfortably.
Vision problems do not cause dyslexia. Dyslexia does not cause vision problems – dyslexia is a language-based learning disorder.
However, vision problems can exist alongside dyslexia or create symptoms that closely mimic it, making reading even more difficult than it already is.
79% of children who do have dyslexia also have a vision problem that make reading and learning even more difficult.
The good news? If vision is part of the problem, it’s something that can be identified and treated.
Can my child have a vision problem and see 20/20?
While most of us think about good vision being 20/20, vision is more complex than that. We have over a dozen visual skills needed to see, read, learn, pay attention, and generally live life unhindered.
Children with dyslexia can have healthy eyes and may even see 20/20 on a standard eye chart. And vision screenings miss up to 75% of children with a vision problem. However, reading also depends on many visual skills beyond seeing clearly, including:
- Eye tracking
- Eye teaming
- Focusing
- Visual processing
- Visual memory
- Visual attention
When these visual skills aren’t working well, reading becomes harder, even for children without dyslexia.
Vision Problems and Dyslexia Can Share Many Symptoms
Shared symptoms include:
- Skipping lines while reading
- Losing place on the page
- Using a finger to keep track
- Slow reading
- Poor reading comprehension
- Reading fatigue
- Avoiding homework
- Headaches after reading
- Words appearing blurry or moving
- Guessing at words
- Difficulty copying from the board
- Short attention span during reading
Because the symptoms overlap so much, many children benefit from both educational testing and a comprehensive functional vision evaluation. Though we recommend beginning with vision, because when visual skills are impaired they can significantly impact reading performance, and even influence the results of your testing. Imagine trying to take a test when your eyes move without your control like this example.
What Makes Reading So Hard?
Reading is one of the most visually demanding things children do. And they do it all. day. long.
To read comfortably, the eyes must:
- Move smoothly from word to word
- Land accurately on each line
- Stay perfectly aligned
- Focus quickly and clearly
- Process visual information efficiently
It’s a beautiful dance that most of us can take for granted. But if even one of these skills breaks down, reading requires much more effort. Children often compensate without realizing it and don’t know how to vocalize an issues since it is all they have ever known.
Instead of saying:
“My eyes aren’t tracking correctly.”
they say:
“I hate reading.”
What About Letter Reversals?
Many parents become concerned when their child writes:
- b instead of d
- p instead of q
- 6 instead of 9
The good news is that letter reversals are completely normal during early reading development. Most children occasionally reverse letters until around second grade.
By third grade, these reversals usually become much less common as reading skills mature.
Today’s children are expected to read earlier than ever before, which means some normal developmental patterns may appear more noticeable in kindergarten and first grade.
However, if letter reversals continue beyond the expected developmental stage—or are accompanied by other reading difficulties—it may be time to look deeper.
Poor Eye Tracking
Some children’s eyes jump backward or forward while reading.
Instead of moving smoothly across the page, they may accidentally reread words or skip ahead.
Reduced Visual Span
Some children can only take in a very small portion of a word at one time.
Instead of recognizing the whole word, they process only pieces of it, making reading slower and less accurate.
Eye Teaming Problems
If the eyes do not work together properly, words may appear:
- blurry
- doubled
- moving
- unstable
A child may not realize this isn’t normal—they simply know reading is hard.
Visual Perception Difficulties
Some children struggle to quickly recognize subtle differences between similar shapes and letter orientations.
This can increase confusion when reading or writing letters that look alike.
Dyseidetic vs. Dysphonetic Dyslexia
While most people simply use the term dyslexia, specialists can describe different patterns of difficulty.
Dysphonetic Dyslexia
Children with dysphonetic dyslexia primarily struggle with the sound structure of language.
They have difficulty:
- sounding out unfamiliar words
- connecting letters with sounds
- decoding words
- spelling phonetically
This is the most commonly recognized form of dyslexia.
Dyseidetic Dyslexia
Children with dyseidetic dyslexia have greater difficulty recognizing whole words by sight.
They may:
- rely heavily on sounding out every word
- struggle to recognize common words automatically
- confuse visually similar words
- have difficulty remembering what words look like
Some visual processing weaknesses may increase the difficulty of quickly recognizing words, although dyseidetic dyslexia itself is still considered a language-based disorder rather than a vision disorder.
We use a Dyslexia Screener to detect the two main forms of dyslexic reading types. While this test does not result in a formal diagnosis of dyslexia, it serves as an important piece of information in the overall evaluation of how a patient’s visual processing might be affecting their reading. Specifically, children who display a dyseidetic reading tendency have been shown to improve in reading fluency with office-based optometric vision therapy when an ocular motor or vergence problem also exists.
This patient had 20/20 vision, but struggled with tracking and eye teaming. She was in special reading class and getting Cs. After vision therapy, she was reading above grade level! We resolved the vision issue getting in the way of her ability to create sight words.
Can Vision Therapy Cure Dyslexia?
No. Vision therapy does not treat the language-processing differences that define dyslexia.
However, vision therapy can treat visual problems that interfere with reading, including:
- convergence insufficiency
- poor eye tracking
- focusing difficulties
- eye teaming problems
- certain visual processing deficits
For children who have both dyslexia and a visual dysfunction, treating the visual component can reduce the extra effort required to read, making it easier to benefit from reading instruction and other educational interventions.
Think of it this way:
If a child is working twice as hard just to keep the words single and stay on the correct line, they have fewer mental resources left for understanding what they read.
A Comprehensive Vision Evaluation Looks Beyond 20/20
A school vision screening or routine eye exam often checks whether your child can see the letters on the eye chart, but it doesn’t check the dynamic vision we need to succeed in school.
At Brighter Outlook Vision, a 90-minute functional vision evaluation examines much more than visual acuity, including over a dozen visual skills like tracking, focusing, and eye teaming.
These skills play a critical role in comfortable, efficient reading.
When Should Your Child Have a Functional Vision Evaluation?
Consider scheduling an evaluation if your child:
- Has been diagnosed with dyslexia
- Is being evaluated for dyslexia
- Skips words or lines while reading
- Frequently loses their place
- Complains that words move or blur
- Gets headaches after reading
- Reads much more slowly than expected
- Understands stories when read aloud but struggles to read independently
- Has poor comprehension because reading requires so much effort
- Avoids reading whenever possible
Helping Your Child Become a More Confident Reader
If your child has dyslexia, appropriate reading instruction remains essential.
But if an undiagnosed vision problem is also making reading harder, addressing the visual component can remove one more barrier to success.
At Brighter Outlook Vision, we work alongside educators, reading specialists, psychologists, speech-language pathologists, occupational therapists, and families to identify whether visual skills are contributing to reading struggles.
Our goal isn’t to replace a dyslexia diagnosis, it’s to make sure nothing else is standing in your child’s way.
“My son was diagnosed with dyslexia and ADHD in 2nd grade and watching him struggle with reading was heartbreaking. By 5th grade, school support helped him reach grade level, but he remained frustrated. The tears were gone, but confidence and willingness to read lacked. At Brighter Outlook Vision, we learned his eyes weren’t working efficiently – letters overlapped, tracking was difficult, and reading was exhausting. Vision therapy changed that! As treatment progressed, his interest in reading grew, his test scores improved, and his confidence soared! I can’t thank BOV enough!”
