No, in my opinion, Leona Lewis does not wear any contacts lenses. Now maybe you will ask me that why the eyes of Leona Lewis are so brown. Yeah, you are right, Leona Lewis' eyes are brown, but not because she wears the contact lenses, instead that is because of her ancestry. If you know Leona Lewis well, you should know Leona Lewis is a beautiful woman of mix blood. Besides, as we all know that the people from Europe have some difference with other peoples. The color of the eyes is one of the differences. Some guys' eyes are black, but the guys from Europe have a pair of brown eyes. Hope must ideas and opinions solve your problem. Thanks.