Comment on "Degree of paraxiality for monochromatic light beams".
This Comment shows that the parameter called the degree of paraxiality of a monochromatic beam [Opt. Lett.33, 1360 (2008)] was derived using misleading criteria and that the results in that Letter might lack physical meaning.
Vaveliuk
Pablo
P
Faculdade de Tecnologia, SENAI-Cimatec, Salvador, Brazil. pablov@fisica.ufpb.br