A new research compilation reveals a clear connection between visual function, reading, and concentration in children. Many challenges are not detected during standard eye tests.
Children's vision problems are not always detected during standard eye tests
Many parents assume that a passed eye test means their child's vision is working correctly. However, new research shows that children can have visual difficulties that affect reading, concentration, and school performance – even if they see sharply on a traditional eye chart.
In a research compilation from April 2026, Marika Wahlberg Ramsay has summarized international research on visual function, refractive errors, and children's learning. The conclusion is clear: vision is about much more than visual acuity.
Vision is about more than just seeing sharply
To cope with the visual demands of school, a child needs to be able to:
focus up close for extended periods
shift focus between books, whiteboards, and screens
coordinate both eyes simultaneously
process visual information efficiently
When these functions do not work optimally, reading and schoolwork can require significantly more energy.
The research report specifically highlights:
farsightedness (hyperopia)
accommodation difficulties
binocular vision problems
Many children also compensate for the problems without understanding why reading feels so strenuous.
Binocular vision problems can affect reading and concentration
When the eyes do not work together optimally, the brain has to expend more energy on the visual process itself.
This can cause the child to:
lose focus more quickly
become unusually tired when reading
avoid homework and schoolwork
get headaches
read slower than peers
struggle to read longer texts
For those around them, it may sometimes look like concentration difficulties, even though the root cause partly lies in how the visual system functions.
Today's school environment places high demands on vision
The research describes today's classrooms as more visually demanding than before.
Children are expected to:
read for longer periods
work in front of screens
write and read up close
shift focus between different distances many times every minute
This places high demands on:
focusing ability
binocular vision
visual endurance
For children with functional vision difficulties, a typical school day can therefore be significantly more energy-consuming than for other students.
Research shows a link between vision and school performance
The compilation presents several studies that show a link between visual difficulties and:
lower reading speed
poorer reading comprehension
reduced reading stamina
weaker school performance
At the same time, research shows that the right support can improve both visual functions and the conditions for learning.
This is not about intelligence, motivation, or willingness to learn. It is about how much energy the brain needs to expend on processing what the eyes see.
Functional vision training can be an important support
At Imvi Labs, we work with digital vision training that focuses on the interaction between the brain and eyes.
Through Imvi Read, we want to make vision training:
accessible at home
easy to use
possible to integrate into everyday life and the school environment
We see a growing need to increase knowledge about functional vision and how it affects children's reading, concentration, and learning.
Common signs that a child may have vision-related reading difficulties
If a child often experiences any of the following, it may be worthwhile to investigate their visual function more closely:
gets tired quickly when reading
loses their place when reading
complains of headaches after school
avoids reading
struggles to concentrate for extended periods
reads slower than expected
experiences text jumping or blurring
Common questions about vision and reading
Can a child have vision problems even if the eye test is normal?
Yes. A standard eye test primarily measures visual acuity. Functions such as binocular vision, focusing, and visual endurance are not examined to the same extent.
Can binocular vision problems affect reading?
Yes. If the eyes do not work together efficiently, reading can become more strenuous and require more concentration.
Can vision difficulties be mistaken for concentration problems?
In some cases, visual difficulties can contribute to symptoms that resemble concentration problems because the child has to expend extra energy on visual tasks.
Read more:
https://optik.optikbranschen.se/ledare/skobarn-och-synfel-vi-kan-gora-skillnad/
Report on vision, refractive errors and school performance
https://imvilabs.com/blogs/lashastighet-och-inlarning/vissa-barn-kan-lasa-i-ungefar-fem-minuter
