The Little Numbers on Your Glasses

For anyone who ever wondered what they mean, GeorgeB wrote this on the little four eyes blog:

Here’s a helpful tidbit that may help in deciphering the numbers on the frames.

The eyeglass numbers are usually written as: 49-19-135 or they might have small boxes between the numbers on the eyeglass frame.

1. The first number in the eyeglass size is the distance across one lens of the eyeglass frame ( does not include the frame)
2. The second number in the eyeglass size is the distance across the bridge on the eyeglass frame or sometimes refered to as the DBL(distance between lenses)
3. The third number in the eyeglass size is the length of the temple(arm piece) from the front of the eyeglass frame to the end of the temple, which goes behind the ear.

you may also be asked for pupil distance..a measurement from one pupil center to another… measured in mm. A small ruler with cm and mm will help with this. It is needed to ensure the lens centers are in line with the pupils..

Always helpful to know!