Towards Immersive Virtual Reality Simulations of Bionic Vision

Kasowski, Justin; Wu, Nathan; Beyeler, Michael

doi:10.48550/arxiv.2102.10678

Cited by 1 publication

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“…Sanchez et al [46] analyzed the influence of field of view with respect to resolution in visual prostheses through a study with a SPV setup using a VR system. Kasowski et al [53] proposed to embed biologically realistic models of SPV in immersive VR so that sighted subjects can act as virtual patients in real-world tasks. Thorn et al [54] implemented prosthetic vision in a VR environment in order to simulate the real-life experience of using a retinal prosthesis and investigated the interaction between the field of view and the pixel number.…”

Section: Introductionmentioning

confidence: 99%

Assessing visual acuity in visual prostheses through a virtual-reality system

Sanchez-Garcia¹,

Morollon-Ruiz²,

Martínez-Cantín³

et al. 2022

Preprint

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Objective. Current visual implants still provide very low resolution and limited field of view, thus limiting visual acuity in implanted patients. Developments of new strategies of artificial vision simulation systems by harnessing new advancements in technologies are of upmost priorities for the development of new visual devices. Approach. In this work, we take advantage of virtual-reality software paired with a portable head-mounted display and evaluated the performance of normally sighted participants under simulated prosthetic vision with variable field of view and number of pixels. Our simulated prosthetic vision system allows simple experimentation in order to study the design parameters of future visual prostheses. Ten normally sighted participants volunteered for a visual acuity study. Subjects were required to identify computer-generated Landolt-C gap orientation and different stimulus based on light perception, time-resolution, light location and motion perception commonly used for visual acuity examination in the sighted. Visual acuity scores were recorded across different conditions of number of electrodes and size of field of view. Main results. Our results showed that of all conditions tested, a field of view of 20 • and 1000 phosphenes of resolution proved the best, with a visual acuity of 1.3 logMAR. Furthermore, performance appears to be correlated with phosphene density, but showing a diminishing return when field of view is less than 20 • . Significance. The development of new artificial vision simulation systems can be useful to guide the development of new visual devices and the optimization of field of view and resolution to provide a helpful and valuable visual aid to profoundly or totally blind patients.

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Section: Introductionmentioning

confidence: 99%