A Study on Contextual Task Performance of Simulated Homonymous Hemianopia Patients with Computational Glasses-based Compensation Chao Ge Graduate School of Engineering, University of Yamanashi Kofu, Japan g21dtsa2@yamanashi.ac.jp Zhenyang Zhu Department of Computer Science and Engineering, University of Yamanashi Kofu, Japan zzhu@yamanashi.ac.jp Keisuke Ichinose Graduate School of Engineering, University of Yamanashi Kofu, Japan soccer79250@gmail.com Issei Fujishiro Department of Information Science, Keio University Yokohama, Japan fuji@ics.keio.ac.jp Masahiro Toyoura Department of Computer Science and Engineering, University of Yamanashi Kofu, Japan mtoyoura@yamanashi.ac.jp Kentaro Go Department of Computer Science and Engineering, University of Yamanashi Kofu, Japan go@yamanashi.ac.jp Kenji Kashiwagi Department of Ophthalmology, University of Yamanashi Chuo, Japan kenjik@yamanashi.ac.jp Xiaoyang Mao Department of Computer Science and Engineering, University of Yamanashi Kofu, Japan mao@yamanashi.ac.jp ABSTRACT People with Homonymous Hemianopia (HH) sufer from losing ipsilateral half side of visual feld in both eyes, which results in failing to obtain visual information in the lost feld. Making using of the remaining of the visual feld, the state-of-the-art studies pro- posed Overlaid Overview Window (OOW) and Edge Indicator (EI) on the basis of Augmented-Reality (AR) glasses for compensation. However, experiments conducted in these studies investigate user performance with tasks involving events in lost feld or remaining feld singly. On the other hand, both studies recruited normal in- dividuals for mock experiment, while their way to simulate HH, which requiring the participants to fx their view angles, were not practical to real HH patients. In this study, we conduct a contextual information experiment to investigate the user performance involv- ing in the task requiring the information across both the visible and invisible sides of HH, with the compensation of OOW and Flicker-based EI (FEI). At the same time, we also recruit volunteers with normal vision for mock experiment, while the participants in our study are allowed to move their gaze freely, because we simulate the invisible feld of HH on AR glasses with eye tracking. The experiment results showed that OOW is better for the task that related to move something from the remaining FoV to the lost FoV, Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for proft or commercial advantage and that copies bear this notice and the full citation on the frst page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specifc permission and/or a fee. Request permissions from permissions@acm.org. VRCAI ’22, December 27–29, 2022, Guangzhou, China © 2022 Association for Computing Machinery. ACM ISBN 979-8-4007-0031-6/22/12. . . $15.00 https://doi.org/10.1145/3574131.3574441 while FEI is better for moving something from the lost FoV to the remaining FoV. CCS CONCEPTS · Computing methodologies → Mixed / augmented reality. KEYWORDS Visual feld defect, Eye Tracking, Contextual, Simulated Homony- mous Hemianopia, Augmented-Reality ACM Reference Format: Chao Ge, Zhenyang Zhu, Keisuke Ichinose, Issei Fujishiro, Masahiro Toy- oura, Kentaro Go, Kenji Kashiwagi, and Xiaoyang Mao. 2022. A Study on Contextual Task Performance of Simulated Homonymous Hemianopia Pa- tients with Computational Glasses-based Compensation. In The 18th ACM SIGGRAPH International Conference on Virtual-Reality Continuum and its Ap- plications in Industry (VRCAI ’22), December 27–29, 2022, Guangzhou, China. ACM, New York, NY, USA, 8 pages. https://doi.org/10.1145/3574131.3574441 1 INTRODUCTION Homonymous Hemianopia (HH) is one kind of diseases which is caused by lesions of the retrochiasmal visual pathways, i.e., lesions of the optic tract, the lateral geniculate nucleus, the optic radiations, and the cerebral visual (occipital) cortex [Biousse et al. 2017]. People with HH sufer from visual feld defect, losing either the two right- or left-half parts of the visual felds of both eyes. The number of patients with HH is reported to account for 0.8% of the population aged 49 years or older [Gilhotra et al. 2002], with trauma, stroke, brain tumor, and other diseases as major factors. Fig. 1 shows a simulated view of people with normal visual feld (Fig. 1(a)) and that of a patient with HH (Fig. 1(b)).