Unsure what exactly the bifocal magnification is, but it seems pretty low, probably only 1.25 - 1.5 at most. The main part of the lens is a normal sunglasses lens . Elevate your style with these classic RALPH LAUREN Sunglasses. The geometric-shaped frames in translucent woodgrain acetate material are perfect for the modern woman who wants to make a statement. The oversized tinted polycarbonate lenses provide full protection from the sun's harmful rays while giving you a chic look. These vintage sunglasses have a bifocal reading lens feature, making them perfect for the busy woman who wants to enjoy a good book or browse through her phone while on the go. The sunglasses have unique striped patterns that blend well with the American and classic themes. Made in France, these sunglasses have a temple length of 130mm, making them a perfect fit for most women.