Horn-rimmed
Thick frames originally made from horn or tortoiseshell, now made in acetate.
Also: horn rims, tortoiseshell frames
Horn-rimmed glasses were first made from the horn of cattle or the shell of the hawksbill turtle, which is now protected. In the 1910s and 1920s the American silent film comedian Harold Lloyd made round horn-rims his trademark, and thick dark frames became the look of scholars, architects and writers through the mid-twentieth century. Acetate in tortoiseshell patterns carries the style today.