Yannick Sauer
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View article: The interplay of user preference and precision in different gaze-based interaction methods in virtual environments
The interplay of user preference and precision in different gaze-based interaction methods in virtual environments Open
Introduction Extended reality (XR) technologies, particularly gaze‐based interaction methods, have evolved significantly in recent years to improve accessibility and reach broader user communities. While previous research has improved the …
View article: The interplay of user preference and precision in different gaze-based interaction methods
The interplay of user preference and precision in different gaze-based interaction methods Open
In this study, we investigated gaze-based interaction methods within a virtual reality game with a visual search task with 52 participants. We compared four different interaction techniques: Selection by dwell time or confirmation of selec…
View article: Assessing visual performance during intense luminance changes in virtual reality
Assessing visual performance during intense luminance changes in virtual reality Open
During indoor-outdoor transitions humans encounter luminance changes beyond the functional range of the photoreceptors, leaving the individual at risk of overlooking harmful low-contrast objects until adaptation processes re-enable optimal…
View article: FOVAL: Calibration-Free and Subject-Invariant Fixation Depth Estimation Across Diverse Eye-Tracking Datasets
FOVAL: Calibration-Free and Subject-Invariant Fixation Depth Estimation Across Diverse Eye-Tracking Datasets Open
Accurate fixation depth estimation is essential for applications in extended reality (XR), robotics, and human-computer interaction. However, current methods heavily depend on user-specific calibration, which limits their scalability and u…
View article: Simulation of various tuning methods in autofocals using a virtual reality headset
Simulation of various tuning methods in autofocals using a virtual reality headset Open
This study evaluates tuning methods for autofocal glasses using VR to address presbyopia. Autofocals dynamically adjust optical power, promising a more natural visual experience than traditional lenses. We compared manual, gaze-based, and …
View article: Assessing visual performance during intense luminance changes in virtual reality
Assessing visual performance during intense luminance changes in virtual reality Open
Summary During indoor-outdoor transitions humans encounter luminance changes beyond the functional range of the photoreceptors, leaving the individual at risk of overlooking harmful low-contrast objects until adaptation processes re-enable…
View article: VisionaryVR: An Optical Simulation Tool for Evaluating and Optimizing Vision Correction Solutions in Virtual Reality
VisionaryVR: An Optical Simulation Tool for Evaluating and Optimizing Vision Correction Solutions in Virtual Reality Open
In the rapidly advancing field of vision science, traditional research approaches struggle to accurately simulate and evaluate vision correction methods, leading to time-consuming evaluations with limited scope and flexibility. To overcome…
View article: Virtual reality (VR) as a testing bench for consumer optical solutions: a machine learning approach (GBR) to visual comfort under simulated progressive addition lenses (PALs) distortions
Virtual reality (VR) as a testing bench for consumer optical solutions: a machine learning approach (GBR) to visual comfort under simulated progressive addition lenses (PALs) distortions Open
For decades, manufacturers have attempted to reduce or eliminate the optical aberrations that appear on the progressive addition lens’ surfaces during manufacturing. Besides every effort made, some of these distortions are inevitable given…
View article: VisionaryVR: An Optical Simulation Tool for Evaluating and Optimizing Vision Correction Solutions in Virtual Reality
VisionaryVR: An Optical Simulation Tool for Evaluating and Optimizing Vision Correction Solutions in Virtual Reality Open
Developing and evaluating vision science methods require robust and efficient tools for assessing their performance in various real-world scenarios. This study presents a novel virtual reality (VR) simulation tool that simulates real-world…
View article: How to Tune Autofocals: A Comparative Study of Advanced Tuning Methods
How to Tune Autofocals: A Comparative Study of Advanced Tuning Methods Open
This study comprehensively evaluates tuning methods for autofocal glasses using virtual reality (VR), addressing the challenge of presbyopia. With aging, presbyopia diminishes the eye's ability to focus on nearby objects, impacting the qua…
View article: Seeing the future of progressive glasses: a new perceptual approach to spectacle lens design
Seeing the future of progressive glasses: a new perceptual approach to spectacle lens design Open
The eye’s natural aging influences our ability to focus on close objects. Without optical correction, all adults will suffer from blurry close vision starting in their 40s. In effect, different optical corrections are necessary for near an…
View article: Simulation Tool for Optical Systems: Evaluating and Optimizing Autofocals and Beyond
Simulation Tool for Optical Systems: Evaluating and Optimizing Autofocals and Beyond Open
The development and evaluation of autofocal glasses require robust and efficient tools for assessing their performance in various real-world scenarios. This study presents a novel virtual reality (VR) simulation tool designed to evaluate t…
View article: Simulation Tool for Optical Systems: Evaluating and Optimizing Autofocals and Beyond
Simulation Tool for Optical Systems: Evaluating and Optimizing Autofocals and Beyond Open
The development and evaluation of autofocal glasses require robust and efficient tools for assessing their performance in various real-world scenarios. This study presents a novel virtual reality (VR) simulation tool designed to evaluate t…
View article: Psychophysical scale of optical distortions of multifocal spectacle lenses
Psychophysical scale of optical distortions of multifocal spectacle lenses Open
Multifocal lenses have regions of different optical power, correcting far and near vision for presbyopes with one pair of glasses. Optical distortions are an unavoidable side effect of those lenses. From previous research and reports of sp…
View article: Inconsistent self-motion perception between hemifields from optic flow distorted by progressive addition lenses
Inconsistent self-motion perception between hemifields from optic flow distorted by progressive addition lenses Open
Progressive addition lenses (PALs) are used as spectacle lenses for presbyopia correction and are characterized by a progressive change of optical power leading to distortions in the periphery of the lens. These distortions change the perc…
View article: The effects of distorted optic flow in multifocal glasses on self-motion perception
The effects of distorted optic flow in multifocal glasses on self-motion perception Open
Progressive addition lenses (PALs) are ophthalmic lenses mainly used to correct presbyopia. They improve far and near vision in different areas of the lens. This inevitably creates local distortions of the spatial field of view. Novice wea…
View article: The latency of reflexive saccades is influenced by contrast and correlates over the horizontal and vertical visual field plane
The latency of reflexive saccades is influenced by contrast and correlates over the horizontal and vertical visual field plane Open
The previous research reporting on the influence of stimulus contrast on eye movements showed decreasing latency in saccadic onset with increasing contrast of a visual stimulus, however considering only horizontally-oriented saccades. The …
View article: Realtime blur simulation of varifocal spectacle lenses in virtual reality
Realtime blur simulation of varifocal spectacle lenses in virtual reality Open
Virtual reality is a promising tool to study the influence of ophthalmic lenses on human perception. Independent of the actual refractive errors of the users' eye, vision through different types of lenses can be simulated while allowing fr…
View article: Application of Spatial Cues and Optical Distortions as Augmentations during Virtual Reality (VR) Gaming: The Multifaceted Effects of Assistance for Eccentric Viewing Training
Application of Spatial Cues and Optical Distortions as Augmentations during Virtual Reality (VR) Gaming: The Multifaceted Effects of Assistance for Eccentric Viewing Training Open
The present study investigates the effects of peripheral spatial cues and optically distorting augmentations over eccentric vision mechanisms in normally sighted participants with simulated scotoma. Five different augmentations were tested…
View article: Virtual reality (VR) as a testing bench for consumer optical solutions: A machine learning approach (GBR) to visual comfort under simulated progressive addition lenses (PALS) distortions
Virtual reality (VR) as a testing bench for consumer optical solutions: A machine learning approach (GBR) to visual comfort under simulated progressive addition lenses (PALS) distortions Open
For decades, manufacturers have attempted to reduce or eliminate the optical aberrations that appear on the progressive addition lens' surfaces during manufacturing. Besides every effort made, some of these distortions are inevitable given…
View article: Reflexive Saccades Used for Objective and Automated Measurements of Contrast Sensitivity in Selected Areas of Visual Field
Reflexive Saccades Used for Objective and Automated Measurements of Contrast Sensitivity in Selected Areas of Visual Field Open
Assessment of CS using reflexive saccades extends the portfolio of suggested eye movement-based tests, allowing objective examination across the VF, which might be helpful especially in the early detection of various eye diseases.
View article: Short-Term Peripheral Contrast Reduction Affects Central Chromatic and Achromatic Contrast Sensitivity
Short-Term Peripheral Contrast Reduction Affects Central Chromatic and Achromatic Contrast Sensitivity Open
Peripheral retinal contrast reduction is suggested as a potential myopia control strategy. However, the underlying mechanism is yet unknown. Therefore, this study investigated the influence of peripheral contrast reduction on central chrom…
View article: Assessment of consumer VR-headsets’ objective and subjective field of view (FoV) and its feasibility for visual field testing
Assessment of consumer VR-headsets’ objective and subjective field of view (FoV) and its feasibility for visual field testing Open
Virtual reality as a research environment has seen a boost in its popularity during the last decades. Not only the usage fields for this technology have broadened, but also a research niche has appeared as the hardware improved and became …
View article: Self-motion illusions from distorted optic flow in multifocal glasses
Self-motion illusions from distorted optic flow in multifocal glasses Open
Progressive addition lenses (PALs) are ophthalmic lenses to correct presbyopia by providing improvements of near and far vision in different areas of the lens, but distorting the periphery of the wearer’s field of view. Distortion-related …
View article: Contrast Sensitivity Testing in Healthy and Blurred Vision Conditions Using a Novel Optokinetic Nystagmus Live-Detection Method
Contrast Sensitivity Testing in Healthy and Blurred Vision Conditions Using a Novel Optokinetic Nystagmus Live-Detection Method Open
OKN-based CS is a novel approach to assess spatial vision, which is sensitive to subtle effects of defocus, allowing use with nonverbal patients and infants. Furthermore, the newly developed tool may improve the performance of such measure…
View article: Spatiotopic skew distortion adaptation with simultaneously present opposing stimuli
Spatiotopic skew distortion adaptation with simultaneously present opposing stimuli Open
Some optical elements, like corrective spectacle lenses with a progressive change in optical power, distort the visual field of the wearer. Optical distortions alter visual form and motion features, processed also up to higher areas of the…