(RECAP) Spring '25 Frame Measurements and Markings Unit Test

Answer true or false to the following: Is the geometric center distance the same as the frame's PD

• True
• False

Answer true or false to the following: In the boxing system, the effective diameter is the diagonal of the box

• True
• False

The ED measurement is the:

• The diagonal measurement of the lens
• Twice the distance of the geometric centers
• The longest measurement on the lens regardless of lens shape
• The larger of the A and B measurement

What is the primary purpose of the boxing system in optics?

• To create consistent frame designs
• To measure frame aesthetics
• To ensure consistent measurements and results
• To determine lens power

When measuring the A dimension in the boxing system, what exactly are you measuring?

• The vertical measurement of the frame
• The longest horizontal measurement in the eye wire opening
• The distance between lenses
• The temple length

What is the ED (effective diameter) in the boxing system?

• The total lens diameter
• Two times the shortest radius
• Two times the longest possible radius
• The vertical measurement of the lens

When measuring B dimension, what are you measuring?

• The horizontal width
• The longest vertical measurement
• The bridge width
• The temple length

Where is the DBL typically measured?

• At half the B measurement
• At the bridge
• At the closest point between lenses
• At the widest point

What makes up a complete frame size specification?

• A, B, and temple length
• A, DBL, and temple length
• A, bridge size, and temple length
• B, bridge size, and temple length

The chassis of an eyeglass frame includes all of the following EXCEPT:

• Bridge
• End pieces
• Temple arms
• Eyewires