Assessing visuospatial processing in cerebral visual impairment using a novel and naturalistic static visual search task.
Xin Zhang, Claire E Manley, Serena Micheletti and 4 others
PMID 36334401WHAT IT FOUND
Children with cerebral visual impairment took significantly longer and made more errors finding toys in cluttered virtual scenes, even when their eyesight was normal.
They struggled most when items were crowded or spread over a wide area. This supports reducing visual clutter and spacing items out.
Key findings
01Participants with CVI had significantly lower success rates and slower reaction times in visual search tasks compared to controls.
02Visual search impairment in CVI was most evident when distractors were spaced closely together or when the field of view was large.
03Deficits were present even in CVI participants with normal visual acuity and intact visual fields, suggesting higher-order processing issues.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPs
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What it does not show
Participants with CVI were required to have sufficient visual acuity and ocular motor function to complete eye-tracking calibration, which excludes those with more severe impairments. The study groups differed significantly in verbal IQ, although this was controlled for in the analysis. The task was a simulated VR environment, which may not perfectly replicate real-world visual search demands.
Declared interests
None declared in the provided text.
The easy way to misread this
Do not assume these findings apply to children with CVI who have severe visual acuity deficits or poor eye movement control, as they were excluded from the study. The results reflect higher-order processing issues in those with relatively preserved basic visual function.