We need one accurate frame width measurement to extrapolate all of the frame measurements. This ensures we accurately scale Virtual Eyewear for Try-On and have accurate data for the frame recommendation engine.
Caliper Measurement
Caliper is the measurement across the width of the frontal frame at the point where the frontal frame meets the temple arm.
- Measured in millimeters to two decimal places
- The measurement should be on the furthest point back on the frontal frame at the highest point
Step by Step Process:
- Obtain a pair of calipers.
- Zero the calipers.
- It’s critical to zero calipers before taking any measurements. If you skip this step, your subsequent measurements may not be accurate. Fully close the calipers then press the zero/on button to set it to zero.
- Lay the frames down on a flat, stable surface.
- Locate the front frame, which is the piece of the frame that contains the lenses and sits on the nose of the wearer.
- Identify the location where front frame meets the temple arms.
- Measure the width of the front frame at the location the front frame meets the template arms.
- If the temple arms overlap the front frame, the arms should be included.
- The measurement should be at the top of the front frame.
Best Practice: perform the measurement three times and average values to minimize measurement error.