Sunglasses don’t have power because the lenses are two curved surfaces with the same radius of curvature. The convex (outside) surface produces magnification, and the concave (inner) surface (the surface near the eye) produces demagnification of the same strength and the two cancel. Since the curvatures on either side of a sunglass are of the same radius, it has no power.
Also, the lenses on sunglasses are made of materials which are less refractive than that used for regular glasses.
It’s another thing that you can add power lenses on to your sunglasses, but sunglasses don’t come with a prescribed lens.
Top 5 Stunning Date Dress Options That Will Make Him Go Weak In His Knees
First dates are all about setting the vibes right, and your date dress will add to the whole shebang! Also, making an...
Comic Characters That Wear Sunglasses/Eyeglasses
Sunglasses and eyeglasses are so popular that they have even made their way into comic books. In some cases, they are...
Top Fall/Winter Sunglasses Trends Of 2018
Sunglasses trends are talked about during spring and summer so why should Fall/Winter Sunglasses Trends be left behin...