Nikon lenses offer 2 types of lenses for single vision: spherical and aspheric/multi-aspheric lenses. Aspherical lenses are flatter and thinner then spherical lenses and have two distinct advantages:
- Better vision. They have less distortion around the edges of the lenses, which allows for sharper vision.
- A more attractive look. They have less magnification, so they have less impact on your appearance