the eyes are organs that detect light and convert it into electro-chemical impulses in neurons. visual perception is the ability to interpret information and surroundings from the effects of visible light reaching the eye. medicine recognizes that altitudes above 1500 meters start to affect humans so that, the eye is very sensitive to restriction of its supply of oxygen. a dimming of vision acc...

PURPOSE When the vision in one eye is preserved (monocular vision) and there is high risk, low prognosis and/or limited resources to the fellow eye surgery, it is unclear if the benefit of binocularity outweighs the reorientation for monocular vision. The goal is to quantify the impact of the quality of vision of both binocular and monocular condition, and in this latter case, between congenita...

This paper addresses the text customisation needs of people with low vision, dyslexia, and related conditions that impact reading, including people with declining eyesight due to ageing. It reports on a literature review and an initial study that explores the aspects of text that users customize (e.g., size, colour, leading, linearization/reflow, and more) for reading RTF and PDF documents, in ...

Overview My research consists of designing and building systems in the areas of Human-Computer Interaction and Accessibility. My dissertation research has primarily focused on the design and development of eyes-free exercise technologies for people who are blind or low vision. In addition, I have collaborated with researchers in industry and in the medical field and built four other systems: 1-...

PURPOSE To determine the incidence and causes of vision loss to assist in the objective determination of the preferred frequency of routine screening for those with normal vision. METHODS A prospective, population-based study of people aged 40 or more years. Standardized examination protocols were used that included presenting and best corrected visual acuity, visual field testing, and compre...

In this research, image analysis was used to optimize the visual output of a traditional Closed Circuit Television (CCTV) magnifying system and a head-mounted display (HMD) for people with low vision. There were two purposes: (1) To determine the benefit of using an image analysis system to customize image quality for a person with low vision, and (2) to have people with low vision evaluate a t...