Essilor Delta 2 Classic, User Manual

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USER MANUAL > GLOSSARY
156 Delta 2 - Edging system > v2 - 08.16
ASYMMETRIC BINOCULAR TRACING
The two circles of frame are read as if they have different shapes; the perimeters and the shapes are preserved.
BOXING DIMENSIONS
The boxing system is a standard method to indicate the dimensions of frame contours (or gauges). This operation consists in fitting
the frame into a rectangle whose dimensions are indicated.
Boxing center: geometric center of the rectangle
Boxing axis: horizontal axis of the frame passing through the boxing center
A-dimension: length of the rectangle
B-dimension: height of the rectangle
D-dimension: nominal nose (DBL)
E-dimension: greatest radius from the boxing center
Boxing height: calculated from the tangent line at the bottom of the frame
EXECUTIVE LENS
Type of bifocal lens with two full fields: one which corrects far vision defects and one which corrects near vision defects. They are
available in two models:
separation line present on the front surface of the lens
separation line present on the rear surface of the lens
Example of lenses of this type: Telex lenses
TM
ID
The (ID) identifier of job is composed of alphanumerics in the list of jobs and of numbers in the list of the collections. It is unique.
JOB
All the actions to be carried out on the tracer, centerer-blocker and edger in order to produce a pair of glasses. It is possible to
memorize it in the shape management screen under an identifier (ID).
LENTICULAR LENS
Type of lens equipped with a small curved optical zone on front or back surface and whose edge is gradually flattened. The
correction is in the central part.
MID-DISTANCE LENS
Type of lens intended for near vision but with a greater depth of field (e.g. Interview lenses
TM
).
PROGRESSIVE LENS
Type of lens whose power varies gradually between the far vision for the upper part of the lens and the near vision for the lower part,
without optical rupture or unaesthetic line.