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Autism spectrum disorders (ASD) have been associated with sensory hypersensitivity. A recent study reported visual acuity (VA) in ASD in the region reported for birds of prey. The validity of the results was subsequently doubted. This study examined VA in 34 individuals with ASD, 16 with schizophrenia (SCH), and 26 typically developing (TYP). Participants with ASD did not show higher VA than those with SCH and TYP. There were no substantial correlations of VA with clinical severity in ASD or SCH. This study could not confirm the eagle-eyed acuity hypothesis of ASD, or find evidence for a connection of VA and clinical phenotypes. Research needs to further address the origins and circumstances associated with altered sensory or perceptual processing in ASD.
The present study could not confirm the eagle-eyed VA hypothesis of autism as postulated by Ashwin et al. (2009a, b). VA in ASD was consistent with the one measured in TYP and SCH when using a short viewing distance, the default number of trials and no “post-hoc maximum likelihood analysis” in FrACT. Moreover, we did not find sex differences in terms of males outperforming females, as might be expected by the systemizing/empathizing theory of gender differences and hypersystemizing approach to ASD (Baron-Cohen et al. 2009). Indeed, as females with ASD are often more severely affected by core and peripheral symptoms than males, the opposite prediction might be similarly justified. In accord with Ashwin et al., ASD subgroups (autism, Asperger’s syndrome, atypical autism/PDD-NOS) did not differ on VA, excluding the possibility of eagle-eyed vision being a valid phenomenon for a more circumscribed clinical picture of ASD. It seems that the previously reported results which lead to the hypothesis of eagle-eyed VA in ASD may indeed be based on a cascade of disadvantageous events owing to changes in the FrACT default settings as suspected by Bach and Dakin (2009) and Crewther and Sutherland (2009), particularly the combination of short viewing distance, high amount of trials and extrapolation of results.
Such a nice optician. My grandson is only 4 and needs glasses. We were so sad, but he explained the issues, and we will follow up as he suggested.
I had such a good experience with the clinic. Very friendly staff and doctor, did not have to wait for long to be called, and was treated respectfully. Thanks, American Family.
Dr. Zurcher has gone above and beyond what any other eye doctor has ever done to figure out what is going on with my eyes. Very happy with American Family Vision.
Family Vision Clinic changed our lives! My daughter was frequently car sick, and she was getting headaches every day, often painful enough that they brought her to tears. We saw a string of doctors and therapists, but we made no progress. Finally, we found Dr. Levi Zurcher and his eye therapist Rain. After ten weeks of eye therapy my daughter no longer gets headaches, and she no longer gets car sick. Daily tears are a thing of the past. I really can’t say enough about this clinic. It was fascinating to watch Dr. Zurcher work. For the first time, someone who knew what they were doing was intently studying my daughter, really trying to figure out all of her eye issues, and his therapist Rain is one of the most patient and lovely people that I’ve ever had the good fortune to meet. We’re finished with eye therapy—yay!—and I have switched to American Family Vision Clinic for all of my family’s other eye health needs.
Very professional, yet kind and helpful. They do what they can to make the appointment comfortable. I was running a bit late, I made sure ti call. They were able to switch me with a patient who was already there, they treated me with respect, and helped my son have confidence by getting him the eye care he needed that day. Thank you so much! Would recommend to anyone. It's a blessing that they care enough to work with people who have all different types of insurance from work to state coverage.
The staff is friendly. The Doc is very knowledgeable. The office is family friendly and everyone is so patient with the little ones.
Is foggy vision troubling you? Let our experienced optometrist restore your sight – book an appointment today and see the […]
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