| 摘要 |
<p>An apparatus comprising a nosepiece (200) coupled to a pair of annular eyewires (300), and a pair of claps hinged to the nosepiece that cooperate with each of two annular eyewires to secure the lenses (102). Each clasp and eyewire contains a locking hole into which a pin may be inserted to secure the clasp in the closed position. The eyeglasses also contain a pair of temples, each of which is pivotally joined to each of the eyewires. The eyewirese have axial marking that indicate the cylindrical axis of the lenses, and bifocal markings that indicate the correct position of the bifocals, so that lenses may be installed and removed without the need for instruments or tools.</p> |
