Which of the following is NOT a characteristic of aspheric lenses?

Aspheric lenses are specifically designed to minimize optical aberrations and provide improved image quality, which makes them distinct from traditional spherical lenses. One of their defining features is that they are not more spherical in shape; instead, they have a more complex, non-spherical form that better controls light rays and reduces distortions.

The characteristics associated with aspheric lenses include thinner edges, which enhance comfort and aesthetics by reducing the thickness of the lens. They also contribute to a wider field of view because their design allows for more accurate focus across a larger area, improving peripheral vision. Additionally, aspheric lenses are known for reduced aberrations, meaning they effectively minimize distortions that can occur with spherical lenses due to their uniform curvature.

In summary, the defining feature of aspheric lenses is their non-spherical shape, which plays a crucial role in enhancing optical performance, making the option that indicates a more spherical shape the correct choice for what is NOT a characteristic of aspheric lenses.