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Base 8.6, Diameter 14.0.  Can be used to replace the old Purevision lenses at around half the price!
New from B+L, the Purevision 2 HD offers correction of Spherical Abberration across the entire power range as well as a thinner centre and edge profile for better comfort, and a larger optically correct centre zone.

The original Purevision only had the abberation correction for low powered short sighted corrections.
This can result in up to one line more vision on the eye chart.