: 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 .
: Ensure it is not expired (most are valid for 1–2 years). If you need an exam, you can visit local centers like Costco Optical or Walmart Vision Center . buy optical glasses online
: If you have a strong prescription, these make the lenses thinner and lighter. : This is the distance between your pupils in millimeters
The general rule is . If you have a round face, go for angular frames (square/rectangle); if you have a square face, go for curves (round/oval). go for angular frames (square/rectangle)
: Essential for reducing glare from screens and night driving.