Glasses width is measured as the distance from the left side of a lens to the right side. To find the lens width, you measure the widest part horizontally across the lens.
Understanding the dimensions of your eyeglasses is crucial for a comfortable and proper fit. The lens width, also known as the 'eye size', is a primary measurement. According to the provided reference, Lens Width is specifically defined as:
"the distance from the left side of a lens to the right side."
To accurately determine this measurement, the reference instructs you to:
"measure the widest or longest parts of the lens."
Therefore, when measuring the width of an eyeglass lens, you locate the horizontal point across the lens that spans the greatest distance from edge to edge.
Key Points for Measuring Lens Width
- Definition: The horizontal distance across a single lens.
- Measurement Location: Taken at the widest point from the left edge to the right edge of the lens.
- Purpose: Helps determine the overall size and fit of the lens within the frame.
Comparing Lens Width and Height
It's helpful to understand lens width in contrast to lens height.
| Dimension | Description | Measurement Method (per reference) |
|---|---|---|
| Lens Width | Distance from left side to right side of lens | Measure the widest/longest part (horizontally). |
| Lens Height | Distance from top side to bottom side of lens | Measure the widest/longest part (vertically). |
Both measurements involve finding the maximum extent in their respective directions.
Why is Lens Width Important?
Knowing the lens width is essential when selecting new frames, especially if you have a prescription.
- Fit: Ensures the lenses fit correctly into the frame's eye wire.
- Appearance: Affects the look of the glasses on your face.
- Prescription: Certain prescriptions, especially those for progressive lenses, may require a minimum lens height or width.
By understanding how lens width is measured – as the horizontal distance from the left side to the right side at the widest point of the lens – you are better equipped to interpret frame size information and choose glasses that fit well.
