Transitions Optical is a U.S.-based company known for manufacturing photochromic lenses, which darken on exposure to specific types of light.

[1] In 1991, Transitions Optical became the first company to commercialize and manufacture plastic photochromic lenses.

[2] From inception the company has been a joint venture between PPG Industries (51%) and Essilor (49%).

[3][4] In April 2014, Essilor acquired the entire stake of PPG in Transitions.

[5] From 2009 to 2012, Transitions Optical was the title sponsor of the Transitions Championship, a PGA Tour event held at Innisbrook Resort and Golf Club in Palm Harbor, Florida.