In recent years, head-mounted display technologies have greatly advanced. In order to overcome the accommodation-convergence conflict, light field displays reconstruct three-dimensional (3D) images with a focusing cue but sacrifice resolution. In this paper, a hybrid head-mounted display system that is based on a liquid crystal microlens array is proposed. By using a time-multiplexed method, the display signals can be divided into light field and two-dimensional (2D) modes to show comfortable 3D images with high resolution compensated by the 2D image. According to the experimental results, the prototype supports a 12.28 ppd resolution in the diagonal direction, which reaches 82% of the traditional virtual reality (VR) head-mounted display (HMD).
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http://dx.doi.org/10.1364/OE.27.001164 | DOI Listing |
J Vis
January 2025
Magic Leap Switzerland GmbH, Zürich, Switzerland.
When rendering the visual scene for near-eye head-mounted displays, accurate knowledge of the geometry of the displays, scene objects, and eyes is required for the correct generation of the binocular images. Despite possible design and calibration efforts, these quantities are subject to positional and measurement errors, resulting in some misalignment of the images projected to each eye. Previous research investigated the effects in virtual reality (VR) setups that triggered such symptoms as eye strain and nausea.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
University of Kentucky College of Medicine, Lexington, KY, USA.
Background: We have been investigating in vivo astrocytic Ca homeostasis in the primary somatosensory cortex (S1) of awake, head-restrained ambulating mice using two-photon technology. Prior results from our lab were obtained in neurons across aging, and in male and female C57Bl6/J mice (Case et al., 2023).
View Article and Find Full Text PDFAlzheimers Dement
December 2024
University of Manitoba, Winnipeg, MB, Canada.
Background: In the last decade, virtual reality has become a popular tool for rehabilitation. It is quite useful in spatial rehabilitation for Alzheimer's disease (AD) as it allows safe navigation in a virtual environment which looks realistic. However, a drawback of virtual reality is cybersickness.
View Article and Find Full Text PDFJ Prosthodont Res
January 2025
Department of Dysphagia Rehabilitation, Division of Gerontology and Gerodontology, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, Tokyo, Japan.
Patients: Three residents of a long-term care home volunteered to participate in a rehabilitation program involving a virtual reality blowgun game. The participants played the game 5 days a week as a new exercise routine. After 4 weeks of intervention, tongue pressure and forced expiratory volume in 1 s improved in all participants.
View Article and Find Full Text PDFTransl Vis Sci Technol
January 2025
Amsterdam UMC, Vrije Universiteit Amsterdam, Ophthalmology, Amsterdam, The Netherlands.
Purpose: This study assessed objective performance, usability, and acceptance of artificial intelligence (AI) by people with vision impairment. The goal was to provide evidence-based data to enhance technology selection for people with vision loss (PVL) based on their loss and needs.
Methods: Using a cross-sectional, counterbalanced, cross-over study involving 25 PVL, we compared performance using two smart glasses (OrCam and Envision Glasses) and two AI apps (Seeing AI and Google Lookout).
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