FRAME WITH PRESCRIPTION RESTRICTION Due to the design of these frames we have to restrict the prescriptions available. We are unable to produce over a -/+4 powered prescriptions. This trendy rectangular frame from Caterpillar has a subtle semi-rimless design. It is made from smooth metal which is extremely lightweight and robust. The spring hinges allow for greater flexibility while the adjustable nose pads ensure a secure hold on your face. Its double bridge design and plastic temple tips give this piece a modern edge. This frame will complement your everyday wardrobe well.