These designer prescription glasses are made to accommodate most prescription lenses.TITANflex M894 frames feature a fashionable full frame design, which is the largest component of designer eyeglasses brands collections. A rim all the way around the lenses, provides for maximum stability and durability.Designed for adults, this model has a Regular type hinge for greater comfort. TITANflex Glasses TITANflex glasses are made by Eschenbach Optik, a market leader in German eyewear, and founded in 1913. Eschenbach Optik invented TITANflex® glasses in 1988 – and has since reinforced the unique combination of perfect wearing comfort and absolute design freedom. The TITANflex® brand is synonymous with superior memory metal technology and high quality materials. All glasses are super flexible at the bridge and temple, ultra-lightweight and less breakable than traditional frames.