Ahmed M Sayed1, Rashed Kashem2, Mostafa Abdel-Mottaleb2, Vatookarn Roongpoovapatr3, Taher K Eleiwa4, Mohamed Abdel-Mottaleb2, Richard K Parrish3, Mohamed Abou Shousha5. 1. Bascom Palmer Eye Institute, University of Miami, Miami, Florida, USA; Biomedical Engineering Department, Helwan University, Helwan, Egypt. 2. Department of Electrical and Computer Engineering, University of Miami, Miami, Florida, USA. 3. Bascom Palmer Eye Institute, University of Miami, Miami, Florida, USA. 4. Bascom Palmer Eye Institute, University of Miami, Miami, Florida, USA; Department of Ophthalmology, Faculty of Medicine, Benha University, Egypt. 5. Bascom Palmer Eye Institute, University of Miami, Miami, Florida, USA; Department of Electrical and Computer Engineering, University of Miami, Miami, Florida, USA; Biomedical Engineering Department, University of Miami, Miami, Florida, USA. Electronic address: Mshousha@med.miami.edu.
Abstract
PURPOSE: To assess the efficacy of novel Digital spectacles (DSpecs) to improve mobility of patients with peripheral visual field (VF) loss. DESIGN: Prospective case series. METHODS: Binocular VF defects were quantified with the DSpecs testing strategy. An algorithm was implemented that generated personalized visual augmentation profiles based on the measured VF. These profiles were achieved by relocating and resizing video signals to fit within the remaining VF in real time. Twenty patients with known binocular VF defects were tested using static test images, followed by dynamic walking simulations to determine if they could identify objects and avoid obstacles in an environment mimicking a real-life situation. The effect of the DSpecs were assessed for visual/hand coordination with object-grasping tests. Patients performed these tests with and without the DSpecs correction profile. RESULTS: The diagnostic binocular VF testing with the DSpecs was comparable to the integrated monocular standard automated perimetry based on point-by-point assessment with a mismatch error of 7.0%. Eighteen of 20 patients (90%) could identify peripheral objects in test images with the DSpecs that they could not previously. Visual/hand coordination was successful for 17 patients (85%) from the first trial. The object-grasping performance improved to 100% by the third trial. Patient performance, judged by finding and identifying objects in the periphery in a simulated walking environment, was significantly better with the DSpecs (P = 0.02, Wilcoxon rank sum test). CONCLUSIONS: DSpecs may improve mobility by facilitating the ability of patients to better identify moving peripheral hazardous objects.
PURPOSE: To assess the efficacy of novel Digital spectacles (DSpecs) to improve mobility of patients with peripheral visual field (VF) loss. DESIGN: Prospective case series. METHODS: Binocular VF defects were quantified with the DSpecs testing strategy. An algorithm was implemented that generated personalized visual augmentation profiles based on the measured VF. These profiles were achieved by relocating and resizing video signals to fit within the remaining VF in real time. Twenty patients with known binocular VF defects were tested using static test images, followed by dynamic walking simulations to determine if they could identify objects and avoid obstacles in an environment mimicking a real-life situation. The effect of the DSpecs were assessed for visual/hand coordination with object-grasping tests. Patients performed these tests with and without the DSpecs correction profile. RESULTS: The diagnostic binocular VF testing with the DSpecs was comparable to the integrated monocular standard automated perimetry based on point-by-point assessment with a mismatch error of 7.0%. Eighteen of 20 patients (90%) could identify peripheral objects in test images with the DSpecs that they could not previously. Visual/hand coordination was successful for 17 patients (85%) from the first trial. The object-grasping performance improved to 100% by the third trial. Patient performance, judged by finding and identifying objects in the periphery in a simulated walking environment, was significantly better with the DSpecs (P = 0.02, Wilcoxon rank sum test). CONCLUSIONS: DSpecs may improve mobility by facilitating the ability of patients to better identify moving peripheral hazardous objects.
Authors: Daniel C Chung; Sarah McCague; Zi-Fan Yu; Satha Thill; Julie DiStefano-Pappas; Jean Bennett; Dominique Cross; Kathleen Marshall; Jennifer Wellman; Katherine A High Journal: Clin Exp Ophthalmol Date: 2017-08-31 Impact factor: 4.207
Authors: Rocío Prado Vega; Peter M van Leeuwen; Elizabeth Rendón Vélez; Hans G Lemij; Joost C F de Winter Journal: PLoS One Date: 2013-10-16 Impact factor: 3.240
Authors: Mina Iskander; Titilola Ogunsola; Rithambara Ramachandran; Richard McGowan; Lama A Al-Aswad Journal: Asia Pac J Ophthalmol (Phila) Date: 2021 May-Jun 01
Authors: Ahmed M Sayed; Mohamed Abou Shousha; M D Baharul Islam; Taher K Eleiwa; Rashed Kashem; Mostafa Abdel-Mottaleb; Eyup Ozcan; Mohamed Tolba; Jane C Cook; Richard K Parrish Journal: PLoS One Date: 2020-10-14 Impact factor: 3.240