Open AccessMulti-periscopic prism device for field expansion
Author(s) -
Eli Peli,
Fernando Vargas-Martı́n,
Nish Mohith Kurukuti,
JaeHyun Jung
Publication year - 2020
Publication title -
biomedical optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.362
H-Index - 86
ISSN - 2156-7085
DOI - 10.1364/boe.399028
Subject(s) - prism , optics , image quality , field of view , visual field , field (mathematics) , computer science , optometry , computer vision , artificial intelligence , computer graphics (images) , image (mathematics) , physics , medicine , mathematics , pure mathematics
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.