Glossary of terms
On this page we will list many common optical terms and their meanings.  These are terms that are spread out through the Nose Pad King website and are linked to this page for your reference.  We have also included som general optical terms in addition to the ones used on this site.


  • Assymmetrical-  This describes something that is not symmetrical or equally shaped on both sides of an object.  As reference to the Nose Pad King, assymmetrical nose pads are straight on one side and curved on another.
  • Bevel-  The edge of a finished eyeglass lens used in metal and plastic eyeglass frames.  Otherwise called a "V" bevel because of the "V"-like appearance.  This is the part of your eyeglass lenses that is inserted into the frame.
  • Bezel-  This is the part of the eyeglass frame that holds the bevel of a metal and plastic eyeglass frame.  It has the similar "V" indentation to allow the bevel to properly fit into it.
  • Bushings-  These are the plastic tube-like pieces that are used in thre piece drill mount (fully rimless) eyeglasses.  The bushing feeds into the drilled holes in rimless eyeglass lenses.  It is from the front (Most cases) of the lenses that the temple piece and bridge piece of the eyeglass frame are inserted into the drilled holes.  Which are pushed into the bushings and causes a pressure fit, resulting in a securely mounted eyeglass frame.  One common brand that uses bushings in their rimless eyeglasses is Silhouette.  However many other brands are now using this method.
  • HD-  This term is an abbreviation and brand name.  The HD stands for High Density.  These nose pads are designed with an extra layer over the nose pads causing the silicone to become more dense.  The benefit in this is that these nose pads will absorb oils at a slower rate than standard silicone nose pads.  The end result, having your nose pads looking better longer.
  • Hinge-  The section of the eyeglass frame that enables the temples to bend.  As some hinges are designed with a spring tension, this allows the temple to fold inwards and to spring in an outwards direction.
  • Nose Pad arm-  This is the brace or stem that is connected to the eyeglass frame which holds the nose pad.  There are many different types of nose pad arms, each designed for a specific nose pad mounting capability.
  • Symmetrical-  Describes an equally shaped object on both sides of its body.  In reference to the Nose Pad King, symmetrical nose pads are curved in the same shape from each side of the nose pad.
  • Temple-  For most people this is what you may call the arm piece.  As it does act like an arm by hugging to the sides of your head.  The temple is actually the piece extending back from the hinge part of the eyeglass frame.  The section that reaches to the side or over the ears for support.
  • Temple tip-  Almost as it sounds, yet temple tips are the plastic, sometimes silicone or rubber pieces that slide onto the ends of the temple on metal eyeglass frames.  A majority of eyeglass frames are designed with temple tips.  Manufacturers sometimes offer different lengths to the temples, and for that reason, the design is to cast the metal in a specific length allowing cutting for smaller lengths.  And since the manufacturers cannot leave the frame finished with metal touching the head, temples tips are slid over the ends to allow a more comfortable fit.
NPK =
Nose Pad     King