An asymmetric total internal reflector (TIR) lens and a luminaire including a plurality of asymmetric TIR lenses designed to provide increased control on spill light and produce asymmetric distribution within each TIR lens and that does not require a secondary optic arranged at an exit plane of the TIR lens. The TIR lenses disclosed herein utilize a refractive member having a plurality of portions, each portion includes a middle longitudinal edge, a middle lateral edge; and a middle corner formed between the middle longitudinal edge and the middle lateral edge. The TIR lens also includes a collimator arranged about the refractive member that includes an inner surface configured to receive electromagnetic radiation from the refractive member and reflect or refract it through an exit plane of the TIR lens.