Can you only use contact lenses and have no glasses?

I'm a 15 year old female and am starting to get short-sighted vision.

I want to wear contact lenses since I feel I will not be confident otherwise.

I was wondering if you need glasses along with contact lenses. As in, after you take them out at night or whatever, you put on your pair of glasses.

So if it necessary to have both contact lenses AND glasses or can you dow with just contact lenses?

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