negetive

optical power means living

Yes but a complex curve will not have a simple or single optical power.

Optical Energy, better known as Optical Power, is the converging strength of a lens. As an example a lens with a high Optical Power will have a wider range of view but less focal distance. A lens with low Optical Power will have a longer focal distance but less range of view.

It is not necessary that a thinner convex lens have less optical power or a thicker lens has more optical power