Treating diabetic retinopathy Treating diabetic retinopathy is a critical aspect of preserving vision and maintaining the overall quality of life […]
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.
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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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.
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Treating diabetic retinopathy Treating diabetic retinopathy is a critical aspect of preserving vision and maintaining the overall quality of life […]
As an optometrist at American Family Vision Clinic in Olympia, one of the most common questions Dr. Levi Zurcher often […]
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