Vertex Distance Calculator

How It Works:

1. Enter the Lens Power (in Diopters, D)
2. Enter the Vertex Distance (in mm)
3. Click “Calculate Adjusted Power”
   • Uses the formula: P′=P1−(d×P)P’ = \frac{P}{1 – (d \times P)}P′=1−(d×P)P​
   • Where d is the vertex distance in meters
4. Click “Reset” to clear all fields

Why Use This Calculator?

✔ Helps in Contact Lens to Glasses Conversion
✔ Essential for Optometrists & Opticians
✔ User-Friendly & Accurate Calculations