: This is the distance between your pupils in millimeters. If it's not on your Rx, you can measure it using apps like Zenni Optical’s PD Tool or Warby Parker’s tool .
: If you have a strong prescription, these make the lenses thinner and lighter. buy optical glasses online
You cannot rely on just your vision prescription; you need two specific data points that online stores often hide in the fine print. : This is the distance between your pupils in millimeters
: Look at the inside of your current, comfortable glasses. You’ll see three numbers (e.g., 52-18-140). These represent Lens Width , Bridge Width , and Temple Length . Match these as closely as possible when browsing online. 2. Matching Frames to Your Face You cannot rely on just your vision prescription;
: Essential for reducing glare from screens and night driving.
: Most top-tier sites like GlassesUSA and Zenni Optical now use AI to map your face and show you how the frames sit in real-time. 3. Choosing Your Lenses