A method is described by which the optical properties of asymmetric Einzel lenses may be measured. This method uses the technique of grid shadows. For the measurement of cardinal elements as well as spherical aberration coefficients, two independent measurements are required. For chromatic aberration coefficients, measurements are required as a function of lens voltage ratio. No extra lens is required for the measurements. An experiment is described in which the optical properties of an asymmetric lens are measured. Within the errors of the measurement, the technique is demonstrated to produce good agreement with theoretical calculations.