Disability shouldn't prevent a user from being able to access a site.
The purpose of an accessibility review is to evaluate your website to ensure that it is accessible to everyone, regardless of disability.
We conducted an accessibility review on a website, where we knew the target audience included a large number of users who were visually impaired.
Studies have shown that visually-impaired users turn graphics off on their browser, so they can read the text more easily, and, if necessary, enlarge the font size. On this site, with graphics turned off, none of the navigation was displayed as it was made up of images only. This resulted in users not being able to find their way through the site.