Verified answer

It means you're slightly short-sighted.

There's no way of telling whether it will get worse - sometimes as a person gets older they become slightly long-sighted... which means if they were short-sighted to start with they end up with near-perfect vision.

It's no great big deal... and take that from someone who is -10.0 in both eyes!

" In general, the further away from zero the number on your prescription, the worse your eyesight and the more vision correction you need. A plus sign in front of the number means you are farsighted and a minus sign means you are nearsighted. These numbers represent diopters, the unit used to measure the correction, or focusing power, of the lens your eye requires."

Usually, as one's body ages, the eyes change and it will get worse or sometimes better.