These designer prescription glasses are made to accommodate most prescription lenses.TITANflex 820539 frames have a rectangle shape, which helps to balance rounded facial features. Frame shape is the most noticeable feature of a pair of glasses, followed by frame color and frame size. Top brands always have a large collection of rectangle frame shape glasses, as well as oval frame shape glasses.These Prescription Glasses feature fashionable rimless frame design. Light and sleek, this design requires high index or trivex lenses.Designed for adults, this model has a Regular type hinge for greater comfort.This frame has a total width of 125mm. 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.