In addition, if someone has partial vision and attempts to zoom in on an image, sometimes it can become pixelated and impossible to understand. As a general rule of thumb, anything that can be dragged or dropped most probably requires a description. A large amount of online content, such as pictures, graphics, or drawings, is visual and so possibly cannot be experienced by someone with vision problems. Many people who are blind/have low vision use screenreaders, which read text out loud when it is clicked or hovered over with a mouse.
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