Head Mounted Displays, systems that project images to one or both eyes and that have in common the fixing points on the head by a helmet, a cap, etc. A complete ESSVI can be implemented in a HMD, although as a rule the batteries and even the processing system use to be in another place, such as pockets or belts.
Published in Chapter:
New Electro-Optic and Display Technology for Visually Disabled People
Ricardo Vergaz Benito (Carlos III University of Madrid, Spain), César Vega-Colado (Carlos III University of Madrid, Spain), María Begoña Coco (University of Valladolid, Spain), Rubén Cuadrado (University of Valladolid, Spain), Juan Carlos Torres-Zafra (Carlos III University of Madrid, Spain), José M. Sánchez-Pena (Carlos III University of Madrid, Spain), Rosa Coco (University of Valladolid, Spain), and Alberto López-Miguel (University of Valladolid, Spain)
Copyright: © 2013
|Pages: 32
DOI: 10.4018/978-1-4666-3986-7.ch036
Abstract
The aim of the chapter is to review the most recent advances in electro-optical technologies applied to visually disabled people. The World Health Organization (WHO) estimates that the number of people in the world with some kind of visual impairment is 285 million, with 246 million of these persons in a partially sighted or Low Vision (LV) condition. The top three causes of visual impairment are uncorrected refractive errors, cataracts and glaucoma, followed by age-related macular degeneration. On the other hand, Head Mounted Displays or electro-optical materials used in liquid crystal or electrochromic devices can be used in technical aids for LV. In this chapter, the authors review how disabled people receive real world information using these new technologies, how the recently developed electro-optical technical aids can improve visual perception, and how these LV aids do work, from a technological point of view.