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Then, the lab can set a different value for specific lens styles (designs). In the lens style (for each different design), on the General tab, is a field "Prism Thinning":
If left blank, it will use the system default. If set to a specific value, that will be the new default for that lens design.
Default can also be set for a Customer (some doctors or ECPs do not want any of their lenses with prism thinning). On the Customer screen, for a particular customer, a specific value for prism thinning can be set, or the customer can be left to "default":
Finally, the prism thinning switch can be set for a particular order. On the F12 (Optional) screen from OE:
For most labs, our recommendation is to set the system default to "F", and then set specific customers, designs, or orders to "N" if needed.
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