My vision for left eye is sph=-0.5, cyl=-.5, axis=90, and right eye is sph=_ , cyl=-0.5, axis =90! should i?

As an optician I would consider this to be a mild RX but certainly worth filling. You will definately see more sharply. Your a good candidate for contacts as well. The half diopter of cylinder (astigmatism) may be masked by spherical equivalent contacts.