Photochromic matrix compositions and tie layer compositions useful for the
preparation of photochromic polycarbonate lenses are disclosed. The tie
layer compositions facilitate adhesion of the photochromic matrix
composition to the polycarbonate lens. The photochromic matrix
compositions can contain a flexible hydrophilic dimethacrylate monomer,
one or more hydrophobic monomers, a flexible hydrophobic
multi(meth)acrylate monomer, one or more urethane methacrylate oligomers,
and one or more photochromic dyes. The tie layer compositions can contain
one or more methacrylate monomers, a (meth)acrylated oligomer with a
polycarbonate backbone, one or more urethane methacrylate oligomers, and
a solvent or solvent mixture. Methods of preparing photochromic
polycarbonate lenses are also disclosed, involving the serial application
of the tie layer composition, then the photochromic matrix composition to
the lens.