广角模拟人工视觉增强了自然环境中的空间导航和物体互动。

Sandrine Hinrichs, Louise Placidet, Antonin Duret, Colas Authié, Angelo Arleo, Diego Ghezzi
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引用次数: 0

摘要

目的:义肢和光遗传学等视力恢复方法可在临床环境中为盲人提供视觉感知。然而,它们在日常生活中的有效性仍然是一个挑战。临床试验中使用的定型定量测试往往无法转化为实际的日常应用。一方面,由于环境的复杂性、可重复性问题和安全性问题,在临床试验中评估现实生活中的益处变得十分复杂。另一方面,在开始临床试验之前,预测自然环境中修复疗法的行为益处可能是一个关键步骤,可以最大限度地减少患者的不适感和未达到的预期。为了解决这个问题,我们利用虚拟现实技术的进步,在物理人工街道环境中开展了一项完全身临其境、生态有效的任务。作为一项案例研究,我们评估了模拟人工视觉中视野大小对常见户外任务的影响。我们的研究表明,广视角(45°)能提高参与者的导航能力,并能更有效、安全、高效地完成任务。此外,它还能提高他们的学习和概括能力。同时,它还能改变视觉探索行为,促进对环境更准确的心理表征。在大多数指标上,进一步增大视觉角度并不会带来显著的额外改善。我们提出了一种将增强现实与自然环境相结合的方法,使参与者能够像视网膜植入患者一样感知世界,并与之进行物理互动。将增强现实与自然环境相结合,是低视力和视力恢复研究的重要框架。
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Wide-angle simulated artificial vision enhances spatial navigation and object interaction in a naturalistic environment.

Objective. Vision restoration approaches, such as prosthetics and optogenetics, provide visual perception to blind individuals in clinical settings. Yet their effectiveness in daily life remains a challenge. Stereotyped quantitative tests used in clinical trials often fail to translate into practical, everyday applications. On the one hand, assessing real-life benefits during clinical trials is complicated by environmental complexity, reproducibility issues, and safety concerns. On the other hand, predicting behavioral benefits of restorative therapies in naturalistic environments may be a crucial step before starting clinical trials to minimize patient discomfort and unmet expectations.Approach. To address this, we leverage advancements in virtual reality technology to conduct a fully immersive and ecologically valid task within a physical artificial street environment. As a case study, we assess the impact of the visual field size in simulated artificial vision for common outdoor tasks.Main results. We show that a wide visual angle (45°) enhances participants' ability to navigate and solve tasks more effectively, safely, and efficiently. Moreover, it promotes their learning and generalization capability. Concurrently, it changes the visual exploration behavior and facilitates a more accurate mental representation of the environment. Further increasing the visual angle beyond this value does not yield significant additional improvements in most metrics.Significance. We present a methodology combining augmented reality with a naturalistic environment, enabling participants to perceive the world as patients with retinal implants would and to interact physically with it. Combining augmented reality in naturalistic environments is a valuable framework for low vision and vision restoration research.

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