Reviewed by Glenn from North Carolina on Monday, August 26, 2013
Great Glasses! Overall quite pleased. The quality and fit is excelent. The only complaint is that they do not darken as much as advertised. They are said to range from spectron 2-4 . I have a pair of Julbo spectron-4 and the Zebra, I would estimate more at level 3.
The base curve is the front curve of any sunglass lens. Sunglasses typically feature base curves between 6 and 9 measured curvatures. Sunglass models that feature a 6 base tend to be more flat relative to the front of the frame. While 9 base styles provide the maximum amount of wrap around your face. Base curves above 8 are not recommended for prescription lenses and the higher the Rx; the flatter the frame is advised. Many sunglasses replicate the look of an 8 base curve with larger temples to help block light coming in from the sides.
Answered on 5/2/2013 3:01:19 PM by Prod. Spec. Kevin from Sierra Trading Post