Can anyone tell me why prescription sunglasses are generally less dark than plano sunglasses of the same type and model? In general a sunglass bought off the shelf would be more darker than the same sunglass made into Rx; why is it so?
Can anyone tell me why prescription sunglasses are generally less dark than plano sunglasses of the same type and model? In general a sunglass bought off the shelf would be more darker than the same sunglass made into Rx; why is it so?
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