The relation between visual orienting functions, visual perception, and functional vision in children with (suspected) cerebral visual impairment.
Quick eye-tracking scores tell you how well a child with CVI will handle stairs, sports, and finding objects.
01Research in Context
What this study did
The team used eye-tracking to watch how the kids with cerebral visual impairment looked at pictures.
They scored how fast each child found a target and how well the child saw shapes and colors.
Then they asked parents how the child coped with stairs, sports, and finding toys at home.
What they found
Kids who were slow to look or who missed shapes also struggled with daily visual tasks.
The link was strong: poor eye skills predicted poor real-world vision more than age or IQ.
How this fits with other research
Torelli et al. (2023) used the same eye tracker and showed high-contrast targets give the steadiest scores.
Cashon et al. (2013) looked at kids with developmental delay and found slow looking, too. The twist: those kids had different brain damage, so the delay meant something else.
Lemons et al. (2015) linked visual-motor gaps to daily skills in Williams syndrome. The pattern is the same—vision problems ripple into everyday life—no matter the diagnosis.
Why it matters
You can now test a child with CVI in under ten minutes and know how much their vision limits play, school, and safety. Pick high-contrast targets, note misses, and use the score to justify extra orientation-mobility training or classroom lighting tweaks.
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02At a glance
03Original abstract
BACKGROUND: Brain-based impairments in visual perception (VP), termed cerebral visual impairment (CVI), are heterogeneous. AIMS: To investigate relations between functional vision and (1) visual orienting functions (VOF) and (2) VP. METHODS AND PROCEDURES: Forty-four children (Males = 20; Mean age = 9y11m) with (suspected) CVI were tested with an adapted virtual toy box (vTB) paradigm (eye tracking visual search task (VST) and a recognition/memory task), VP tests, a preferential looking eye tracking (PL-ET) paradigm, and the Flemish cerebral visual impairment questionnaire. Relations were tested with Spearman correlations. OUTCOMES AND RESULTS: Functional vision was related to VOF and VP. Children who performed poorly on the VST performed worse on the PL-ET paradigm (r success rate = 0.508-0.654; r reaction time (to fixation) = 0.327-0.633; r fixation duration = 0.532; r gaze fixation area/error = 0.565). Faster VST reaction time was related to higher recognition/memory task accuracy (r = -0.385) and better object/picture recognition (r = -0.371). Higher accuracy in the recognition/memory task was related to better object and face processing (r = -0.539), less visual (dis)interest (r = -0.380), and better clutter and distance viewing (r = -0.353). CONCLUSIONS AND IMPLICATIONS: In CVI, VOF, VP, and functional vision are interlinked, and when one is impaired, it negatively affects the others. Hence, quantitatively profiling basic functioning, higher-order and daily life abilities is crucial.
Research in developmental disabilities, 2023 · doi:10.1016/j.ridd.2023.104619