單焦點光致變色（感光）鏡片

The tint transition is impressively smooth—indoors they're crystal clear, but step outside and they darken noticeably within seconds. I picked the gray color and it looks great with my everyday frames.

I was worried they'd be too slow to change, but these lenses go from clear to a nice dark tint in under a minute when I step outside. The 1.57 index keeps them lightweight, and I chose the gray tint which looks subtle and professional indoors.

The transition from clear to tinted is surprisingly quick when I step outside, and the anti-scratch coating has held up well so far. I chose the gray tint, and it's perfect for everyday use without looking too dark indoors.