Authors
MORSE, STEPHEN E. OD, MPH, PhD, FAAO; JIANG, BAI-CHUAN PhD, FAAO

Oculomotor Function After Virtual Reality Use Differentiates Symptomatic from Asymptomatic Individuals

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Abstract/Introduction

Abstract

Some individuals who use virtual reality (VR) head-mounted displays (HMD) have adverse visual symptoms.

 

Purpose 

We measured oculomotor functions of symptomatic (n=10) and asymptomatic (n=10) individuals to determine if there were fundamental oculomotor performance differences. Method. Before and after 20 min of biocular VR- HMD use, we measured: phorias, fixation disparity, gradient accommodative convergence to accommodation ratio (AC/ A), stereopsis, and near point of convergence.


Conclusion/Results

Results 

We observed an exophoric shift in the near point phoria of almost all subjects, whereas the farpoint phoria showed no trend. Interestingly, we observed that the phoric shift at far and near was highly correlated for the asymptomatic subjects but not for the symptomatic subjects. In addition, the (stimulus) AC/ A ratio of symptomatic subjects was reduced after a period of VR- HMD use, whereas asymptomatic subjects' AC/ A ratio was not reduced.

 

Conclusion 

The oculomotor changes among the symptomatic subjects (increased exophoria at near and reduced AC/ A) appears consistent with a reduced accommodative response. In contrast, the asymptomatic subjects show changes (correlated change in phorias) which seem most consistent with adaptation in the tonic component of vergence and/ or accommodation


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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!


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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!


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Seems much less frustrated with life

Reads non-stop and fast

Spelling abilities have been hugely improved

Seems much more confident

Thank You!!!


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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!!!


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