I used to wear lenses of power -0.25D in one eye and -0.25D in the other eye!

Now the doctor have given me lenses of power -1.00D in one eye and -.50D in the other eye. Are my eyes getting worse? I am 15 yrs old.
>>> I used to wear lenses of power -0.25D in one eye and -0.25D in the other eye!