In Annapurna, the source rules csv file has been extended so that three new columns are used when considering to use the main or the alternative supplier. The new columns are:
K: Minimum Power
L:Maximum Power
M: Maximum Cylinder.
There has to be an entry in all three columns for this test to be made and also an alternative supplier has to be set.
The prescription on the right and left are checked against these values. If the prescription on either eye falls outside this range then the alternative supplier is selected.
This is for the case when the alternative supplier offers a wider range.
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