In many cases men work in diving suits rather than in caissons; these suits are made of rubber except for the head piece, which is of metal provided with transparent eyepieces. 伯莎M.克拉克.科学通论.
Robert Jordan took his glasses from his shirt pocket and turned the eyepieces until the end of the bridge showed sharp and gray-painted-metal clear. 欧内斯特·海明威.丧钟为谁而鸣.