雙光變色（感光）鏡片

I was worried bifocals would look bulky, but the transition is seamless and the lens index options let me pick something thin enough for my frames. The light response is quick enough that I don't feel blinded walking outside.

The switch from clear to tinted is so smooth I barely notice it happening, and the bifocal line sits right where I need it for reading my phone. These have completely replaced my need to carry two pairs around, which is a huge win for my daily commute.

Took these on a sunny hiking trip and the automatic tinting worked perfectly—they darkened just enough to cut glare without making the trail look muddy. The bifocal reading strip is also in just the right spot for glancing at my phone between views.