Nidek Medical LE-9000DX Express, Operator'S Manual

Page: 144 / 153

A - 2
A.2 Selection of Blocking
FPD
FPD
PD
PD
H o r i z o n t a l l y
d e c e n t e r i n g
amount
Blocking point
Optical center
Rim center
Blocking point:
Rim center
Optical center
Rim center
PD for near vision
5 mm OUTSIDE
PD
BT
5 mm UP
Blocking point: 5 mm UP/ 5 mm OUTSIDE
(2) Selection of lenses and layout
V e r t i c a l l y
d e c e n t e r i n g
amount
Bifocal lenses
See "4.3.2.2 Layout of bifocal lenses"
(p. 4-9).
Active mode
See "4.4.1 Blocking in active mode"
(p. 4-12).
This is for blocking a lens at the optical
center.
Bifocal mode
See "4.4.3 Blocking bifocal lenses"
(p. 4-14).
This is for bifocal lenses. Block at the
position of 5 mm above and 5 mm
outside from the top line center of the
segment with a lens cup.
Progressive power lenses
See "4.3.2.3 Layout of progressive
power lenses" (p. 4-10).
Passive mode
See "4.4.2 Blocking in passive mode"
(p. 4-13).
This is for blocking a lens at the rim
center.