1. not spherical; deviating from the shape of a perfect sphere
Usage: technical; commonly used in optics and lens design
2. (of a lens or mirror) having a surface that is not part of a sphere, designed to reduce optical aberrations
Usage: optics

Examples

• The telescope uses aspherical lenses to improve image clarity.
• Aspherical mirrors are often found in high-end camera systems.
• Modern eyeglasses may incorporate aspherical surfaces to reduce distortion.
• The aspherical design of the lens minimizes spherical aberration.
• Aspherical optics have become standard in professional photography equipment.