Treating diabetic retinopathy Treating diabetic retinopathy is a critical aspect of preserving vision and maintaining the overall quality of life […]
SIGNIFICANCE
To judge the feasibility of virtual reality (VR) headsets for vision testing and treatment of binocular vision disorders and low vision, angular resolution (logMAR) and field of view must be known and may not be reliably provided. This is the first study to measure the limitations of VR systems for eye care applications.
PURPOSE
This study aimed to measure, in a sample of VR headsets, lens power and other physical and optical characteristics needed to calculate minimum angular resolution in logMAR and field of view in determining feasibility for vision applications.
METHODS
Lens power and horizontal display size were measured, and logMAR, field of view, and maximum convergence demand were calculated for two standalone VR devices, Oculus Rift DK2 and HTC Vive, and, for four smartphone VR headsets, Zeiss VR1, Samsung Gear VR, VR Box, and SunnyPeak, each paired with four high-resolution smartphones, Samsung Galaxy S7/S8, iPhone X, and LG VR30.
RESULTS
On average, the smallest letter that could be displayed in VR was 0.55 ± 0.17 (20/71), ranging from 0.79 (20/123) in the DK2 to 0.28 (20/39) in SunnyPeak with S7. Mean field of view was 67.1 ± 18.0°, ranging from 39.6° in the SunnyPeak with S7 to 85.6° in the HTC Vive. The mean field of view when used as a low vision aid was 30.8° and 16.9° for 2.2× and 4×, respectively. The mean maximum near convergence demand produced for a 60-mm interpupillary distance was 68.2 ± 32.9Δ.
CONCLUSIONS
The minimum angular resolution in logMAR of current VR technology is insufficient for visual acuity testing and may be insufficient for standalone treatment of amblyopia. Field of view may be less than that reported by manufacturers but adequate for some types of visual field testing and similar to existing telescopic low vision aids. Use for vergence testing and training is a concern for headsets with long eye-to-screen distance when interpupillary distance <60 mm.
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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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