An optical aberration is a distortion of an image as compared to the object due to defects in an optical system
Reference:
Naidoo, D, Mafusire, C and Forbes, A. 2009. Demonstrating optical aberrations in the laboratory. 54th Annual Conference of the South African Institute of Physics (SAIP), Durban, South Africa, 6-10 July 2009, pp 1
Naidoo, D., Mafusire, C., & Forbes, A. (2009). Demonstrating optical aberrations in the laboratory. South African Institute of Physics. http://hdl.handle.net/10204/3765
Naidoo, Darryl, C Mafusire, and A Forbes. "Demonstrating optical aberrations in the laboratory." (2009): http://hdl.handle.net/10204/3765
Naidoo D, Mafusire C, Forbes A, Demonstrating optical aberrations in the laboratory; South African Institute of Physics; 2009. http://hdl.handle.net/10204/3765 .