NOTE 1 It is accepted that other test lenses can also be used with powers within the given range, manufactured to the same standard of accuracy and form, but different back vertex powers. However, only lenses with integer nominal powers, as described in Annex A, can be used for the cali-bration of digitally-rounding focimeters.
BS ISO 9343:2004 history
2022BS ISO 9343:2021 Pliers and nippers. Slip joint pliers. Dimensions and test values
2004BS ISO 9343:2004 Pliers and nippers - Slip joint pliers - Dimensions and test values