Authors
Jan Freyberg; Caroline E. Robertson; Simon Baron-Cohen

A Close Eye on the Eagle-Eyed Visual Acuity Hypothesis of Autism

publication date
2011 Jun 10
see more

Abstract/Introduction

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.


Conclusion/Results

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.


Testimonials


  • My eight year old daughter was terrified to go to the eye doctor for fear of her eyes being dilated. The doctor was SO KID friendly! He immediately made her comfortable by engaging her in conversation. It was a geat experience.


    Joya B.

  • Dr. Garbus spent an amazing amount of time to solve my very complicated visual problems. Over the years he has continually achieved results beyond what others felt possible. He is always up to date on the latest science. He is great!


    Dolores K.

  • Family Vision Care Valencia makes it so easy. Staff is knows what they are doing and Dr. Garbus is thorough and kept me well informed during the exam.


    Kristy B.

  • I have been coming to Family Vision Center for almost 20 years. Dr. Garbus has been able to help my vision when other doctors could not. Now my kids see him as well. I highly recommend this office!


    Autumn C.

  • The Doctor is very good. I felt on this visit he seemed rushed. I had questions to ask him but he was already with another patient. I still do not know if my eyes are the same , worse, or better.


    Howard B.

Testimonials


My eight year old daughter was terrified to go to the eye doctor for fear of her eyes being dilated. The doctor was SO KID friendly! He immediately made her comfortable by engaging her in conversation. It was a geat experience.


Joya B.

Dr. Garbus spent an amazing amount of time to solve my very complicated visual problems. Over the years he has continually achieved results beyond what others felt possible. He is always up to date on the latest science. He is great!


Dolores K.

Family Vision Care Valencia makes it so easy. Staff is knows what they are doing and Dr. Garbus is thorough and kept me well informed during the exam.


Kristy B.

I have been coming to Family Vision Center for almost 20 years. Dr. Garbus has been able to help my vision when other doctors could not. Now my kids see him as well. I highly recommend this office!


Autumn C.

The Doctor is very good. I felt on this visit he seemed rushed. I had questions to ask him but he was already with another patient. I still do not know if my eyes are the same , worse, or better.


Howard B.

All the staff is friendly, helpful and knowledgeable, and has been for all the years I have been going there.


Mary Ann H.
1 2 3 13

Blog

main-2

Macular degeneration: separating fact from fiction- myths and misconceptions

Macular degeneration is the leading cause of blindness in older adults in the United States. Approximately 20 million adults in the US suffer from age-related macular degeneration (AMD). A recent study reveals that the number of AMD cases has doubled from previous estimates. In 2019, 18 million people over 40 were diagnosed with early-stage AMD, […]

Read More
frustrated-millennial-businessman-having-strong-headache-tired-from-laptop-work

Alleviating Eye Strain from Digital Devices: Tips and Exercises for Relief

As we spend more and more time in front of computer screens and cell phones, it's important to be aware of the potential effects on our eyes. Eye strain, pressure between the eyes, and headaches can be caused by prolonged device use, as well as shoulder and neck pain. In this blog, we'll provide some […]

Read More
woman-look-at-the-computer-screen-C7JER3X

Understanding Double Vision (Diplopia): Causes, Symptoms, and Treatments in Santa Clarita, CA

Each year in the United States, there are approximately 850,000 visits to eye doctors for double vision (diplopia), with 95% of these being made on an outpatient basis. The overwhelming majority of cases are treatable and not indicating a major health issue with visits from an outpatient setting. However double vision in an emergency room […]

Read More
see all blogs

Contact Us To Amplify Your EyeCare

Working Hours

Monday - Thursday
8:00 am - 5:15pm
friday-sunday
Closed
Location
28089 Smyth Drive Santa Clarita, CA 91355
Website Accessibility Policy
Safety protocols page
Amplify Eyecare Santa Clarita phone-handsetarrow-uparrow-right linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram