For the second time I have run across a progressive with a marking above the nasal circle that looks stick figure of a flame. There is a vertical line, a gap and then 4 lines radiating from the top. I think it was a lens used by OSA. Any ideas. Thank you in advance. I should add there was also F18 engraved under the nasal circle.
Last edited by optical-addict; 01-27-2015 at 07:36 PM.
can you draw that out?
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