{"id":2936,"date":"2019-08-26T14:09:40","date_gmt":"2019-08-26T21:09:40","guid":{"rendered":"https:\/\/keck.usc.edu\/news\/augmented-reality-glasses-may-help-people-with-low-vision-better-navigate-their-environment\/"},"modified":"2023-11-19T12:34:23","modified_gmt":"2023-11-19T20:34:23","slug":"augmented-reality-glasses-may-help-people-with-low-vision-better-navigate-their-environment","status":"publish","type":"post","link":"https:\/\/keck.usc.edu\/news\/augmented-reality-glasses-may-help-people-with-low-vision-better-navigate-their-environment\/","title":{"rendered":"Augmented reality glasses may help people with low vision better navigate their environment"},"content":{"rendered":"\n \n \n\n\n\n\n\n\n\n
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Augmented reality glasses may help people with low vision better navigate their environment<\/h1>\n\n\n<\/div>\n \n \n
\n Wendy Wolfson<\/span>\n \n August 26, 2019<\/span>\n <\/div>\n \n \n
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Nearly one in 30 Americans over the age of 40 experience low vision \u2014 significant visual impairment that can’t be corrected with glasses, contact lenses, medication or surgery.<\/h2>\n

In a new study<\/a> of patients with retinitis pigmentosa, an inherited degenerative eye disease that results in poor vision, Keck School of Medicine of USC<\/a> researchers found that adapted augmented reality (AR) glasses can improve patients\u2019 mobility by 50% and grasp performance by 70%.<\/p>\n

\u201cCurrent wearable low vision technologies using virtual reality are limited and can be difficult to use or require patients to undergo extensive training,\u201d says\u00a0Mark Humayun, MD, PhD<\/a>, director of the USC Dr. Allen and Charlotte Ginsburg Institute for Biomedical Therapeutics<\/a>, codirector of the USC Gayle and Edward Roski Eye Institute<\/a> and University Professor of Ophthalmology at the Keck School.<\/p>\n

\u201cUsing a different approach \u2014 employing assistive technology to enhance, not replace, natural senses \u2014 our team adapted AR glasses that project bright colors onto patients\u2019 retinas, corresponding to nearby obstacles,\u201d Humayun says.<\/p>\n

Patients with retinitis pigmentosa wore adapted AR glasses as they navigated through an obstacle course based on a U.S. Food and Drug Administration\u2013validated functional test. Using video of each test, researchers recorded the number of times patients collided with obstacles, as well as the time taken to complete the course.<\/p>\n

Patients averaged 50% fewer collisions with the adapted AR glasses. Patients also were asked to grasp a wooden peg against a black background \u2014 located behind four other wooden pegs \u2014 without touching the front items. Patients demonstrated a 70% increase in grasp performance with the AR glasses.<\/p>\n

\u201cPatients with retinitis pigmentosa have decreased peripheral vision and trouble seeing in low light, which makes it difficult to identify obstacles and grasp objects. They often require mobility aids to navigate, especially in dark environments,\u201d says Anastasios N. Angelopoulos, study project lead in Humayun\u2019s research laboratory at the Keck School.<\/p>\n

\u201cThrough the use of AR, we aim to improve the quality of life for low vision patients by increasing their confidence in performing basic tasks, ultimately allowing them to live more independent lives,\u201d Angelopoulos says.<\/p>\n

How the AR system works<\/h3>\n

The AR system overlays objects within a 6-foot wireframe with four bright, distinct colors. In doing so, the glasses provide visual color cues that help people with constricted peripheral vision interpret complex environments, such as avoiding obstacles in dimly lit environments.<\/p>\n

To accomplish this, researchers used a process called simultaneous location and mapping, allowing the AR glasses to fully render the 3D structure of a room in real time. The glasses then translated this information into a semitransparent colored visual overlay, which highlighted potential obstacles with bright colors to help patients with spatial understanding and depth perception. This technology can work on commercially available devices.<\/p>\n

According to Humayun, while major cost and technical issues remain, this type of assistive technology could eventually become more practical for everyday use in the near future.<\/p>\n\n\n\n<\/div>\n <\/div>\n\n\n <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":164,"featured_media":2937,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[6],"tags":[627,56,57,20],"class_list":["post-2936","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-press-release","tag-department-of-ophthalmology","tag-featured","tag-recent","tag-research"],"acf":[],"yoast_head":"\nAugmented reality glasses may help people with low vision better navigate their environment<\/title>\n<meta name=\"robots\" content=\"index, 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