Special lenses are required for rimless eyeglass frames due to the design and construction of these frames. Rimless frames have holes drilled into the lenses to hold them securely in place. These holes create stress points, which can weaken standard lenses made of lower-index materials. We recommend MR-8 1.61 Index lenses for rimless frames because they are strong, lightweight, and offer clear vision. They can withstand drilling and hold a tint longer than other materials. You can also choose 1.67 MR-7 Index lenses for similar benefits. Enjoy durable and high-quality lenses for your rimless eyeglasses.