Get Your PD Right Before Ordering Glasses Online: This pd ruler for eyeglasses lets you measure the distance between your pupils at home, so you don't end up with blurry vision or headaches from lenses that were centered for someone else's face;
Easy to Use with a Friend or a Mirror: This pupillary distance ruler features a nose bridge notch that keeps it steady while you look straight ahead, helping you get an accurate reading without needing expensive optician visits;
4 Piece Value Pack: This pd measurement tool for eyes set includes four rulers, giving you spares for your desk, car, travel bag, and a backup to lend to a friend who also buys glasses online;
Lightweight and Flexible: This pd ruler for eyeglasses is made from soft, clear plastic that bends without breaking, allowing it to lie flat against your face for a steady reading and roll up small to fit in a wallet or glasses case;
Single and Dual PD in One Tool: This pupillary distance ruler measures both eyes together and each eye separately, so whether you need one number for single vision glasses or two numbers for progressive lenses, you get what your online order form asks for;