“Frame Wrap” is the adjusted curve of a spectacle frame when viewed from above. It is important for some types of high powered, aspheric or progressive spectacle lenses.
The website linked here has a chart you can use to calculate the wrap of a spectacle frame. This is a measurement that you will often require when ordering modern lenses.
TIP: Print and laminate this chart for making these measurements in your eye-care practice.
Click here to go to the page: Then scroll to >Dispensing Aids
Click here to view the Frame Wrap chart.