What's an Aspheric Lens?

An aspheric lens or asphere is a lens whose surface profiles are not portions of a sphere or cylinder. In photography, a lens assembly that includes an aspheric element is often called an aspherical lens.

What is the purpose of aspheric lens?

Aspheric lenses allow optical designers to correct aberrations using fewer elements than conventional spherical optics because the former gives them more aberration correction than multiple surfaces of the latter.

Who would benefit from having aspheric lenses?

People who have higher order refractive errors, usually +4.00 diopters or more, benefit the most from aspherical lenses. Reading glasses and contact lenses are also being manufactured with this type of lens, so more people can benefit from clearer vision.