Visual impairment means that someone has trouble seeing things clearly, or they can't see at all. This can happen because of different reasons. Sometimes our eyes just don't work right, other times we might have an injury, and some people are just born with it.
People who have a visual impairment can't see things the same way everyone else can. They might need help to see things more clearly or to do things they have trouble doing, like reading or seeing far away. Some people might use special tools like glasses, magnifiers, or even devices like computers that help them see things better.
For someone with visual impairment, the world can be a little bit different. They might need help to navigate new places, read books or signs, or even play sports. But just because someone has a visual impairment doesn't mean they can't do all the things other people do, they just might need to do them a little differently.