  We revisit the problem of bound states in graphene under the influence of
point electric monopole and dipole impurity potentials extended to the case in
which the membrane of this material is uniformly and uniaxially strained, which
leads to a redefinition of the charge and dipole moment, respectively. By
considering an anisotropic Fermi velocity, we analytically solve the resulting
Dirac equation for each potential. We observe that the effect of the anisotropy
is to promote or inhibit the critical behavior known to occur for each kind of
impurity, depending on the direction along which strain is applied: both the
atomic collapse, for the monopole impurity, and the emergence of cascades of
infinitely many bound states with a universal Efimov-like scaling, for the
dipole impurity, are phenomena that occur under less or more restrictive
conditions due to strain.
