Getting the right protective glasses depends on getting a frame size that fits comfortably.
The frame size is imprinted on the inside of the arm with sequence:
(eye size) - (bridge size) - (temple size)
Example: 53-19-145
Eye size or lens width: horizontal width of each lens at the widest point
Bridge size: width of the nasal bridge; also the distance between the lenses
Temple or arm length: horizontal distance from the frame hinge to the vertical through the arm tip
|
Dimension
|
Usual Range
|
|
eye size
|
40 to 62 mm
|
|
bridge size
|
14 to 24 mm
|
|
temple length
|
120 to 150 mm
|
Variation in temple length:
(1) location of the hinge based on the frame brand
(2) some measure the absolute distance along the upper surface of the arm
Additional measurements:
(1) lens height: vertical width of the lens at its widest point
(2) total frame width: horizontal distance from the left to right extent of the frames
