That means you have got nearsightedness and need glasses for distance. reading glasses are needed when people can't focus on the near objects, like reading books. Since you can read without glasses, you don't need reading glasses at all.
If you can see clearly without wearing any glasses, you don't need reading glasses, instead, you only
need to take your glasses off when you read books. If not, you need reading glasses or bifocals both for
reading and seeing far.