Abstract
Contact lenses have recently moved from passively enhancing beauty by their role in replacing spectacles to becoming active beauty aids. The active beauty aid modality occurs when contact lenses change or enhance the color of the wearer's eyes. Eye color changes with contact lenses can be dramatic when a person with dark eyes appears to have blue eyes. Dramatic eye color changes occur by placing an appropriate, intermittent pattern of opaque pigments on the contact lens that overlays the iris. Underlying iris color aids the pigment in changing eye color. In addition, subtle enhancements are available whereby a person with blue eyes appears to have green eyes. Reactive dyes can make cosmetic lenses that enhance rather that change eye color. Chemistry and technology behind these apparent eye changes will be discussed.
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