I would like to create a curve from equation and revolve it to form an aspheric lens. Whats the best way to do this? Creo doesn't allow me to revolve the curve I have created from equation.

I would like to create a curve from equation and revolve it to form an aspheric lens surface.  Creo does not allow me to revolve the curve from equation however, what is the preferred method of revolving/creating such a surface?