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This chapter describes the lens centering procedures according to the type of lens.
Description of the centering environment (p.37)
Centering a single vision lens (p.44)
Centering a progressive lens (p.46)
Centering a bifocal lens (p.50)
Centering an executive lens (p.51)
Centering a mid-distance lens (p.53)
Centering a lens for a high-base frame (p.44)
This chapter also describes the procedure.lens blocking (p.57)
1. Centering environment
This section describes the centering screen and the various centering modes available:
Description (p.37)
Menu screen (p.41)
Job call (p.43)
a. Description of the centering blocking system
Pre-requisite: before carrying out the centering of the lens, supply a posiblock and a pad Essilor.
Centering
Lower the tube manually.
Insert the posiblock and its pad in the centering device.
Raise manually the tube back into centering position.
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