A-dimension (eyesize, lens size) B-dimension istance Between Centers (DBC) Frame information card
The opening in an eyeglass front into which a lens is inserted. Aperture dimensions (in millimeters) do not include the depth of the bevel groove.
A system of measurement used to define various prescription requirements relative to lens and frame dimensions.
A measurement of the Boxing System which measures the distance between Vertical tangents to the bevel of a lens.
A measurement of the Boxing System which measures the distance between horizontal tangents to the bevel of a lens.
The minimum horizontal distance between lenses, as measured in Millimeters at the apices of their bevels.
A linear measurement, expressed in millimeters, equal to twice the longest radius of an ophthalmic lens measured from its geometric center to the apex of its edge. Defines the minimum lens that will fit a frame when the geometric center of the lens is exactly centered in the frame.
The supportive structural member connecting the two eyes of an ophthalmic frame front.
A bridge design for a front that does not permit continuous contact between the nose and the front in the area of the nasal crest.
A bridge design for a front that permits continuous contact between the nose and the front in the area of the nasal crest.
The horizontal linear distance between geometric centers of the two eyes of a frame front.
Card included with all frames you receive from SWEEP Optical. On the frame information care is the frame name, color and size. Needs to be saved and returned with the frame to receive full credit.
The style of temple that has almost no bend over the ear; it was originally designed for ease of removal.
A style of temple that has a slight bend which allows the frame to fit easily over the ear, and to hug the head lightly.
A-dimension (eyesize, lens size)
istance Between Centers (DBC)
Frame information card
Author: Source: Dictionary of Ophthalmic Optics