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
GROOVE WITH MENISCUS
The curve of the rim of the frame is considerable.
JOB
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.
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.
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
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