Which design feature enhances the stability of a myopic lens?

The feature that enhances the stability of a myopic lens is prism ballast. This design incorporates a thin layer of prism at the bottom of the lens, which helps to lower the center of gravity. As a result, the lens tends to settle in a stable position on the eye when worn. This is particularly important for myopic lenses, as they often have more mass than other types, and the prism ballast aids in keeping the lens aligned properly during use, thus enhancing visual performance and comfort for the wearer.

While the other options might contribute to lens design in various ways, they do not specifically focus on stability in the same manner. A standard base curve mainly relates to fitting and comfort rather than stabilization. Low Dk softness refers to the material's permeability to oxygen, which is crucial for health but does not influence lens stability directly. Aspheric alignment pertains to the curvature of the lens for visual correction, rather than its physical stability on the eye.