Photochromic molecules are well known for reversible change of colour under irradiation. They are most widely utilized in the ophthalmic and entertainment industries.

The nontoxic nature of ExpertSun polymers permits their use in contac with the human body. This innovation has led to the manufacturing of photochromic intra-ocular implants (patents FR28806906,EP1834195) whose absorbance profile protects the retina against UV rays.

A whole series of make-up and skin care products is being evaluated.