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Weird ghost double image when looking at bright light source

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Weird ghost double image when looking at bright light source

Postby erotavlas on Sun May 05, 2013 4:29 pm

I'm shopping for a new pair of sunglasses but repeatedly for some pairs that I've tried in store, I noticed that when I look at the overhead ceiling lights, there appears a faint double image of the light usually on either side of it. On some sunglasses (like Oakleys) I noticed the effect to me more visible. On other I've tried like Maui Jim, it is very faint. My current pair of Serengeti's that I purchased many years ago do not exhibit this effect. I tried on Persol's and they do not as well. Can anyone comment on this? WHy does this occur, does it mean the lens is poor quality?

I know its not my eyes because the sales associate confirmed the effect by trying the sunglasses on as well and they can see it.

Its actually preventing me from buying a pair until I figure out if it has to do with quality of the lens or not.
I'm only concerned with glass lenses.
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Joined: Sun May 05, 2013 4:19 pm

Re: Weird ghost double image when looking at bright light so

Postby larumd on Tue May 07, 2013 10:39 am


Thank you for the post. This ghost image is from glare or surface reflections. This is why most brands use a backside AR coating especialy when the lens is polarized. This anti-reflective coating helps diminish this annoying reflections. You may notice a blue, purple or green sheen on the side closest to your eyes, this is the AR. AR coating may not remove them completely but reduce them.

I would suggest choosing brand that automatically comes with it or having it appliesd to custom order. Please let us know if you have any other questions.
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