A Comparison of Dyop Color Perception and Dyslexia Diagnosis

Authors

Sandra Stark, B. Optom, B.Sc. Hons. Stark-Griffin Dyslexia Academy, Johannesburg Area, South Africa

A Comparison of Dyop Color Perception and Dyslexia Diagnosis

publication date

Abstract/Introduction

Background:

Acuity and accommodation

result from an array response of the L (red), M

(green), and S (blue) cone photoreceptors and

the relative refractive focal depths of those

specific colors. A Dyop® (or dynamic optotype)

is a spinning segmented ring visual target which

uses the strobic detection of the spinning gaps/

segments of the ring to measure visual function.

Dyop gap/segment color/contrast permutations

have distinctive, and corresponding, acuity

endpoints. This study’s objective was to compare

the qualitative acuity responses of a specific

Dyop color/contrast combination to diagnosed

symptoms of dyslexia.

Methods:

One hundred and eighty-eight patients,

ranging in age from 4 years to 44 years, were

examined as patients of the Stark-Griffin Dyslexia

Academy to compare their relative color/contrast

acuity endpoint perception of a spinning green-on-

white Dyop versus a spinning blue-on-black Dyop

and the possible diagnosis of types of dyslexia.

The Stark-Griffin Dyslexia Academy trains eye care

professionals as to how to diagnose and treat

patients with potential symptoms of dyslexia. The

patients were diagnosed as to their prevalent type

of dyslexia, if any, through the Stark-Griffin Dyslexia

Assessment. The patients were then presented

with, as part of the Chart2020 vision test platform,

a display which has an identical-diameter spinning

green-on-white Dyop and spinning blue-on-black

Dyop with sufficient arc width diameter such that

both Dyop rings were detected as spinning. Those

identically sized Dyop rings were then reduced

in arc width until spinning of each of the colored

rings was not detected. The smallest diameter

ring where spinning was detected for each of the

color/contrast combinations (corresponding to

the acuity endpoint metric value) was recorded as

the color acuity endpoint.

Conclusion/Results

This preliminary evaluation of the

disparity of color perception versus diagnosed

symptoms of dyslexia showed a strong positive

association (~86%) between color perception and

diagnosed symptoms of dyslexia. The findings

suggest that symptoms presented by dyslexics

could be better understood or analyzed by their

color perception.

Testimonials

Vision therapy is well worth the response, time and effort. Our Son had a hard time focusing and writing neatly. After vision therapy Seth could complete a task in half the time if previously took. His abilities to focus improved greatly and so did his handwriting.

Also, he was better at listening. As a parent, we wanted learning to be fun for our Son, and vision therapy made this possible.

Amanda T.

Vision Therapy is well worth the expense, time and effort. Our son had a hard time focusing handwriting neatly. After vision therapy Seth could complete a task in half the time it previously took his abilities to focus and improved greatly and so did his handwriting.

Also, he was better at listening. As a parent you wanted learning to be fun for our son and vision therapy made this possible.

Alexa H.

Vision Therapy has given or son the tools he needs to be able to scan and read the written word more effectively and efficiently.

He love working with John and these working sessions give him the motivation to gladly work on his homework assignments.

It amazed us to see the difference in the tracking of his eyes and along a line of it's from the beginning to the end of the treatment.

Dr. McBryar , Kristen and John are all marvelous and we would recommend them to anyone I only wish that we would have found them sooner!

Charlotte M.

Prior to coming to the institute for vision development my son complained of daily headaches. Therapy has eliminated his headaches completely. I love knowing my son is able to learn pain-free for the rest of his life because of the work that has been done over just a few weeks in this office. He he absolutely loved coming that didn't even feel like going to a doctor or therapy. We are grateful for the relief he was able to find by coming here.

Thank you!

Olivia C.

Seems much less frustrated with life

Reads non-stop and fast

Spelling abilities have been hugely improved

Seems much more confident

Thank You!!!

Kelly O.

When we first came to the practice, my son did not have huge issues, but lots of small ones- trouble with reading, sports (hitting the baseball consistently), coordination, etc- that were not easily detectable,but when put together presented issues. The staff here were all very professional and loving towards him. While I was concerned in the reading, my son was concerned with the athletic side. Seeing improvement night off the bat gave him confidence that i have nor seen in him and made him want to not only Come to therapy, but also made him want to work hard. He has surpassed his grade level and above in reading and hit his first home run this year! Thank you!!!