To obtain spectacles having attractive and inexpensive quality and improved stability by providing the spectacles with uniblocks partly formed with housings for magnets or other holding means suitable for holding auxiliary lenses arranged in superposition on main lenses.

The uniblock 10 is formed of a casting structure and has the housing 12 for the magnet 14 suitable for holding the auxiliary lens covering the main lens. The uniblock 10 has also a part 20 forming part of a restraining block 22 for fixing the uniblock 10 to the main lens. This part 20 is connected to one end 24a of frame or rim 24 enclosing the lens. As a result, the restraining block 22 fixes the uniblock 10 to the lens. The other end 24b of the rim 24 has a flange 26 to be fitted into the recess of the part 20 and is fixed by a screw or pin 30. The uniblock 10 includes a terminal 32 having excellent beauty as part of the casting structure of the same integral type.