Hemispatial neglect, also known as unilateral / spatial / side neglect, is a neuropsychological condition causing a lack of awareness and attention to one side of the body. This may make the patient act oblivious to one side of space, such as reading only one side of text on a website. I could find no information on design or UX for hemispatial neglect, so the ideas in this post could be breaking new ground.
For people with dyslexia reading web pages can be difficult, but there are things designers can do to make it easier. They are quite simple changes, but may require sacrificing some design freedom.
Designing for colorblindness is important as 8% of people have it. But there are many other reasons color might be hard to see so good design should be baked in from the start. A colorblind "mode" shouldn't be tacked on as an afterthought. There are several tools and techniques to help make designs better for everyone, colorblind included.
I've been working on a University of Hertfordshire project which aims to be used by people with a range of disabilities. There are a set of standards for this called the Web Content Accessibility Guidelines (WCAG). Version 1 was introduced in 1999 and version 2 in 2008. As these guidelines are a W3C standard and have been around for a long time I hope designers are aware of and try to follow them whenever possible.
Which sides should I put my Cancel and OK buttons on? This is a question of the honourable subject, USER EXPERIENCE. Read on to find out that the answer is neither and both!