I'm stumped. I made a pair of poly polarized lenses for a customer and the left lens has a persistent strand of light down the center. I chalked it up to a defect and ordered a redo on a different base curve just to be safe, but the new lens has the exact same problem. Two lenses, dif bases, same problem. Has anybody ever seen this before? What causes it? Is it some byproduct of birefringence between polarization coat and the lens itself? I don't want to waste a third redo, and make the customer have to wait longer, so any info is def helpful.
Btw, the rx for this lens is -7.25 +1.25 @10, the axis doesn't matter because the strand moves with the axis...or maybe it's moving with the polarization. It appears to be gone once it is off 90 degrees. Anyways, take a look at the pic and let me know.
The right eye RX, which has no issues, is -6.50 +2.00 @170. Just in case you guys want to know.
Thanks so much.
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