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WebTransitions lenses contain special patented photochromic dyes that cause the lens to activate, or darken, when exposed to ultraviolet rays from sunlight. When the UV light diminishes, the lenses fade back. As light conditions change, the level of tint adjusts, offering the right tint at the right time. It's important to note that the UV ... WebThe Clear Choice. Transitions® Signature® GEN 8™ lenses fade back to clear up to 3 minutes faster than Transitions® Signature® VII lenses.**. * As compared to Transitions® Signature® VII lenses. CR607 products … density of seawater in slugs
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