For people with triangle faces, they have a narrow forehead and eye line that widen at the cheeks and the chin. To latter the face, you can try semi-rimless frames that accentuate the upper face.
As we know, the goal of choosing eyeglasses for triangle faces is to add width to your forehead and make your jaw line appear softer and narrower. So, glasses frames with angle up and outward at the top corners will be a good choices.
When we choose glasses, we should pay attention to the shape, color and size of the frame. As for those who with triangle faces, I hold the view that they should select a pair of rimless frame glasses with light colors and wider bottom. Because this kind of frame can minimize the width of the top of the face so that it can make the face look more attractive and gentle. And there is another important thing I must say that everyone looks best in his or her own color base, so when choosing the color of the frame, we should take the colors of skin, eyes and hair into account. Then go to the store to try on more glasses, and you may well find a pair of suitable glasses quickly according to theses principles.