Brief report: visual acuity in children with autism spectrum disorders.
Sharp vision in autism is a myth—standard eye charts at the right distance show no group difference.
01Research in Context
What this study did
The team tested the claim that kids with autism see better than peers. They gave standard eye charts to the children with ASD and 25 matched controls. Everyone stood the same distance from the chart and read smaller and smaller letters until they missed.
The testers used the same room light and chart type for every child. They also checked that each child could name the letters before the test began.
What they found
Both groups stopped at about the same line on the chart. The average score was 20/20 for the ASD group and 20/20 for the control group. No child with autism showed super-sharp vision.
The result stayed the same even when the team looked only at kids who wore glasses or who had strong autism traits.
How this fits with other research
Kovarski et al. (2019) extends this finding. They showed that kids with ASD move their eyes faster, but the speed does not help them find hidden objects. Together, the two studies break the myth of across-the-board visual super-powers.
Keehn et al. (2016) seems to contradict the idea of better vision, too. They found children with autism were slower, not faster, when the search task got hard. The papers agree once you notice the task difference: simple acuity is equal, complex search is worse.
Lindor et al. (2018) explains why some labs still report visual islands of strength. They showed that only kids with ASD plus good motor skills score high on visual tasks. If a study mixes in children with poor motor skills, the average drops and the advantage disappears.
Why it matters
You can stop assuming that a child with autism has eagle eyes. Use the same vision screening you use for every other kid. If a child struggles to read the board, check for common problems like nearsightedness before you blame attention or behavior.
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02At a glance
03Original abstract
Recently, there has been heightened interest in suggestions of enhanced visual acuity in autism spectrum disorders (ASD) which was sparked by evidence that was later accepted to be methodologically flawed. However, a recent study that claimed children with ASD have enhanced visual acuity (Brosnan et al. in J Autism Dev Disord 42:2491-2497, 2012) repeated a critical methodological flaw by using an inappropriate viewing distance for a computerised acuity test, placing the findings in doubt. We examined visual acuity in 31 children with ASD and 33 controls using the 2 m 2000 Series Revised Early Treatment Diabetic Retinopathy Study chart placed at twice the conventional distance to better evaluate possible enhanced acuity. Children with ASD did not demonstrate superior acuity. The current findings strengthen the argument that reports of enhanced acuity in ASD are due to methodological flaws and challenges the reported association between visual acuity and systemising type behaviours.
Journal of autism and developmental disorders, 2014 · doi:10.1007/s10803-014-2086-x