Aspheric optical lenses are important for variety of optical applications, but are difficult to fabricate in conventional top-down processes. Yet, attaining these complex shapes with spatially varying curvature is non-trivial in conventional top-down methods that involves forming, grinding and polishing the surface of a rigid material like quartz or glass or molding against a preformed surface. Such multistep methods are expensive, require skilled workman-ship, a stringent control of temperature and humidity and suffer from high failure rate. In this context, we have developed a novel bi-convex optical lens, the inspiration for which comes from the now-extinct sea creature Trilobite, a sea creature that existed 600 to 245 million years ago and became extinct even before the first Dinoseraus came to earth. These animals had one of the most advanced visual systems that allowed all the light rays emanating from a point source to focus on a single point on the optical axis without spherical aberration. Taking cue from the specific shape of the Trilobite lens we have developed a bottom-up method for making aspherical optical lens.