Boyer was a French optical company founded in Paris in 1895 by Antoine Boyer, then sold in 1925 to André Levy (1890-1965). His wife, Suzanne Lévy-Bloch, a brilliant mathematician and optician, was the chief designer of Boyer lenses from 1925 until her husband’s death in 1965. The company closed in 1982. Nearly all of Boyer’s lenses were named after jewels like the famous Saphir. Some of them today are highly sought-after collector’s pieces.