Peli Eli, Vargas-Martin Fernando, Kurukuti Nish Mohith, Jung Jae-Hyun
Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, 20 Staniford St, Boston, MA 02114, USA.
Departamento de Electromagnetismo y Electrónica, Universidad de Murcia, Murcia, Spain.
Biomed Opt Express. 2020 Aug 5;11(9):4872-4889. doi: 10.1364/BOE.399028. eCollection 2020 Sep 1.
Patients with visual field loss frequently collide with other pedestrians, with the highest risk being from pedestrians at a bearing angle of 45°. Current prismatic field expansion devices (≈30°) cannot cover pedestrians posing the highest risk and are limited by poor image quality and restricted eye scanning range (<5°). A new field expansion device: multi-periscopic prism (MPP); comprising a cascade of half-penta prisms provides wider shifting power (45°) with dramatically better image quality and wider eye scanning range (15°) is presented. Spectacles-mounted MPPs were implemented using 3D printing. The efficacy of the MPP is demonstrated using perimetry, photographic depiction, and analyses of the collision risk covered by the devices.
视野丧失的患者经常与其他行人碰撞，其中风险最高的是来自方位角为45°的行人。目前的棱镜视野扩展装置（约30°）无法覆盖风险最高的行人，并且受到图像质量差和眼睛扫描范围受限（<5°）的限制。本文介绍了一种新的视野扩展装置：多潜望镜棱镜（MPP）；它由一系列半五角棱镜组成，可提供更宽的偏移能力（45°），图像质量显著更好，眼睛扫描范围更宽（15°）。通过3D打印实现了安装在眼镜上的MPP。使用视野测量、摄影描绘以及对装置所覆盖的碰撞风险的分析来证明MPP的功效。
