The internet should work for everyone
The internet is a wonderful resource, and fundamentally, it's designed to be open - to everyone. But inclusion and accessibility relies on those creating content to ensure that at all times they are designing for inclusion.
The internationally recognised standards for web accessibility are compiled by the W3C's (World Wide Web Consortium) Web Accessibility Initiative (WAI). They're known as the WCAG (Web Content Accessibility Guidelines).
The full details of these guidelines can be viewed on the W3C website, but this toolkit is designed to detail these guidelines in an easy to implement manner. It is far from exhaustive, but offers a useful introduction to key components.
Understanding how those with vision impairments use the internet
Many people with vision impairments rely on screen readers to access online content.
There are some very simple steps you can take to ensure that your content can be easily understood by screen readers and other assistive technologies. Browse through the sections of this toolkit to find information on designing websites, creating accessible emails and ensuring that you're using all of the accessibility features available on social media.
Check out this video from W3C's Web Accessibility Initiative providing an introduction to web accessibility.
Check out this video from W3C's Web Accessibility Initiative on converting text to speech.