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a. make sure the left and right of lens.
b. measure the degree of distance portion.
First moving the distance portion of lens to the bracket ,and then focus, when the target change
from circle mark to cross mark , press the reading button , distance portion measurement
complete.
c. measuring the near portion add power.(Add: the first add power )
Moving the lens to measurement direction to make the near portion located on the bracket (as to
trifocal lens, moving the middle portion to the bracket), and press the reading button, the degree
of near portion measurement complete.
As to bifocal, the measure step finished.
As to trifocal, please process step d to measure add power of near portion.
d. measuring the near portion add power. (Ad2: the second add power)