what are the benefits of inverse lenses on sunglasses?

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I keep getting ads for sunglasses with inverse lenses (curving inwards instead of outwards). The marketing is not very clear about the benefits, if any.

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Anonymous 0 Comments

From what I can tell, they are being intentionally vague with what benefits it bestows. If it had a clear and definite benefit, they would extol it. So this seems like a marketing gimmick

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