  In this work, we summarize the current state of understanding of lateral
displacement and angular deviations of an optical beam propagating through
dielectric blocks. In part I, the analytical formulas, found for critical
incidence, are compared with numerical calculations and, when possible,
extended from Gaussian to more general angular distributions. Angular
deviations are discussed both for the critical and for the Brewster incidence.
The combined effect, known as the composite Goos-Haenchen shift, shows an
interesting axial dependence and, under particular circumstances, the
intriguing phenomenon of the light oscillation. In part II, the weak
measurement technique is discussed in detail and compared with direct optical
measurements.
