Did you know that small frames such as these can carry power number as high as -10?! 😯
Raw form of power lens is in circle shape, its circumference (outer area/border) is thicker and middle of the lens is thin!
This is the reason, we recommend small frames to people who have eyesight number above 4 SPH! The lens are cut and fixed as per the frame shape without the lens peeking out of the frame border.