
What follows is an essay by Aaron Richardson (Simon Fraser University).
One part of the internet is invisible to the sighted, but keenly visible to the blind: alt text. Short for “alternative text,” alt text improves accessibility for blind readers by describing an image textually. That text appears in the code, which can then be read to visually impaired users through a piece of technology called a screen reader. But this text is likely to remain completely hidden to sighted users, except for the relative few involved in coding and composing.
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