  It is proved that every knot in the major subfamilies of J. Berge's lens
space surgery (i.e., knots yielding a lens space by Dehn surgery) is presented
by an L-shaped (real) plane curve as a "divide knot" defined by N. A'Campo in
the context of singularity theory of complex curves. For each knot given by
Berge's parameters, the corresponding plane curve is constructed. The surgery
coefficients are also considered. Such presentations support us to study each
knot itself, and the relationship among the knots in the set of lens space
surgeries.
