Glasses Frame Size Calculator

Formula

The formula to calculate the Glasses Frame Size (FS) is:

\[ \text{FS} = \frac{\text{L} + \text{W} + \text{B}}{3} \]

Where:

\( \text{FS} \) is the glasses frame size (mm)
\( \text{L} \) is the lens diameter (mm)
\( \text{W} \) is the bridge width (mm)
\( \text{B} \) is the temple length (mm)

What is a Glasses Frame Size?

A glasses frame size refers to the specific measurements that determine the fit of the eyeglasses on the wearer's face. It typically includes three main dimensions: lens width (the width of one lens), bridge width (the distance between the two lenses), and temple length (the length of the arm piece). These measurements ensure that the glasses fit comfortably and securely on the wearer's face, providing optimal vision correction and comfort.

Example Calculation

Let's assume the following values:

Lens Diameter (L) = 50 mm
Bridge Width (W) = 20 mm
Temple Length (B) = 140 mm

Using the formula to calculate the Glasses Frame Size:

\[ \text{FS} = \frac{50 + 20 + 140}{3} = \frac{210}{3} = 70 \text{ mm} \]

The Glasses Frame Size is 70 mm.