What is an arc lens?
ARC stands for Accurate Radius Curvature. The lens is thicker at the optical center and thins out toward the edges of the lens. This is better because when light waves from the sun hit an aggressively curved standard sunglass lens, the light refracts causing distortion, which reduces optical clarity, causing distorted vision and/or headaches. Most ARC lenses overcome this potentially dangerous problem by tapering the thickness of the lens towards the outer edge, thus allowing light waves to be delivered to the eye with no refraction or distortion. This results in greater optical clarity.
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