strata skin sciences strata skin sciences strata skin sciences (formerly mela sciences, inc.) is an american medical device company focused on the design, development and commercialization of non-invasive tools to provide additional information to dermatologists during melanoma skin examinations. strata skin sciencestypepublictraded asnasdaq: ssknfounded1 january 1989 headquartershorsham, pennsylvania, pennsylvania, united stateswebsitestrataskinsciences.com the company’s flagship product, xtrac®, is a medical device that allows for a trained dermatologist to treat skin conditions like vitiligo and psoriasis with monochromatic uv light. following completion of a successful conformity assessment procedure, strata skin sciences has also been granted ce mark approval for sale of melafind® in the european union. in july 2015, the company acquired photomedex inc. and is planning to relocate its headquarters from irvington, new york to horsham, pennsylvania in montgomery county.