Essilor Mr Blue 2.0, User Manual, Page: 149 / 152

USER MANUAL > GLOSSARY
Mr Blue 2.0 > v4.0 -09.16 149
All of the actions to be carried out together on the tracer and the edger to manufacture a pair of glasses. It is recorded in the shape
management screen under a specific identifier.
MID-DISTANCE LENS
Type of lens intended for near vision but with a greater depth of field (e.g. Interview lenses ).
TM
OPTYL
High flexibility plastic material used for certain frames.
PRECALIBRATED LENS
Precalibration ensures that the lenses are suited to the characteristics of the frame and wearer.
Example: Precal 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.
RECUT LENS TRIPOD
Specific tripod to center recut lenses or the small lenses.
REFRACTIVE INDEX
Characterizes the refractive power of a transparent optical material.
The indices vary according to the materials used for the lenses:
Plastic lens: 1.5
Polycarbonate lens: 1.59
Medium or High Index lens: > 1.5
Trivex™ lens: 1.5 to 1.6
Tribrid™ lens: 1.6
Glass lens: 1.5 to 1.9
SINGLE VISION LENS
Type of single vision lens correcting amétropies. The power of the lens is the same over all its surface.
SYMMETRIC BINOCULAR TRACING
The shape of the right circle of frame is applied symmetrically to the left circle; the traced perimeters are preserved.
TRIFOCAUX BIFOCAL LENSES/
Type of lens with distinct correction areas:
the upper part of the lens is used for far vision.
the lower part of the lens is used for the near vision.
TRIPOD FOR HIGH-BASE LENSES
Specific tripod to center high-base lenses