Levenhuk Inc

Practical Systems Inc., based in Odessa, FL, is now operating under the name CoreOne. The company remains committed to its original mission while aligning its identity with the CoreOne brand. Calhoun International has transitioned to this new branding, ensuring a seamless experience for its clients. The company maintains the same high standards and dedication to service as before. Generated from the website

Founded in 1990, Transitions Optical is one of the leading manufacturers of photochromic lenses worldwide. It offers more than 100 lens options in various lens materials and designs. The company employs over 1,200 people and has partnerships with nearly 10 lens manufacturers. Transitions Optical features products under the Transitions brand for children, teenagers and adults. It has received recognition from the American Optometric Association and World Council of Optometry for ultraviolet absorbers and blockers. The company promotes healthy sight and wellness through outreach, education and support of global organizations. Transitions Optical has received several awards of excellence for lens materials, lenses, lens treatments, younger optics and trilogy in transitions.