difficulty or inability to use the hands, including tremors, muscle slowness, loss of fine muscle control, etc., due to conditions such as Parkinson's disease, muscular dystrophy, cerebral palsy, stroke Visual: Visual impairments including blindness, various common types of low vision and poor eyesight, various types of color blindness.The needs that web accessibility aims to address include: When sites are correctly built and maintained, all of these users can be accommodated without decreasing the usability of the site for non-disabled users. And when content is written in plain language and illustrated with instructional diagrams and animations, users with dyslexia and learning difficulties are better able to understand the content. When flashing effects are avoided or made optional, users prone to seizures caused by these effects are not put at risk. When videos are closed captioned or a sign language version is available, deaf and hard-of-hearing users can understand the video.
When pages are not coded in a way that hinders navigation by means of the keyboard alone, or a single switch access device alone, this helps users who cannot use a mouse or even a standard keyboard.
When clickable links and areas are large, this helps users who cannot control a mouse with precision. When links are underlined (or otherwise differentiated) as well as colored, this ensures that color blind users will be able to notice them. When text and images are large and/or enlargeable, it is easier for users with poor sight to read and understand the content.
When sites are correctly designed, developed and edited, more users have equal access to information and functionality.įor example, when a site is coded with semantically meaningful HTML, with textual equivalents provided for images and with links named meaningfully, this helps blind users using text-to-speech software and/or text-to-Braille hardware. Web accessibility, or eAccessibility, is the inclusive practice of ensuring there are no barriers that prevent interaction with, or access to, websites on the World Wide Web by people with physical disabilities, situational disabilities, and socio-economic restrictions on bandwidth and speed.