Essilor Pro-B 300, User Manual

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The lens is centered and ready to be blocked.
To block the lens, refer to the section Centering a lens > Blocking a lens
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b. Centering a progressive lens using manufacturer markings mode
Prerequisite:
• The markings must be clear
• The lens must at least have the following markings:
1. Far vision mark
If centering help is enabled, the cross must contain at least three branches: , ,
2. Centering marks
If centering help is enabled, the marking must include at least two lines on the same axis at the
centering point:
◦ Minimum length: 3 mm
◦ Average thickness: 0.5 mm
Description of the centering target
1. Centering cross (white cross) and boxing center of the shape (blue cross)
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Pro-B 300 > v1.0 - 03.19
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ENTERING A LENS