Mens Transition Photochromic Reading Glasses Readers Sunglasses UV

Features:

Transition means the color can transit from clear to dark gray not means bifocal or progressive. 

The stronger of the sunlight, the darker of the lenses will be.

 The lenses can't change color indoor or in the car.

Lens Attributes:

1. 1.56 index UV400 Photochromic Transition (Optional) Aspherical Lens

2. Strength: +100 to +350 by Increments of 25

3. Frame: Designer half rim frames

4. Lens Color: Transition gray (you can see green coating when the glasses reflect sunlight, normally transparent)

Size: 

Lens Width: 53mm/2.09''

Bridge: 18mm/0.71''

Temple: 142mm/5.59''

Lens Height: 32mm/1.26''

Frame Width: 143mm/5.63''