Frame Measurements You Need To Know

Every Frame is Measured this Way

Your eyeglasses have several important measurements.


A = Lens opening width at widest point.

B = Represents the height of the lens opening.  This is useful for determining the frame's suitability for bifocal, trifocal and progressive lens prescriptions.

DBL = Bridge size (18 mm in the example image)

Temple Length - the length of the arm from the hinge connection to the end of the temple piece.  140 MM in the example image.

Other measurements that are useful and that may be included (not illustrated in example image):

ED = Effective diameter which may be helpful in helping the optician lay out the ideal lens focal position and in determining the size of the lens blank needed before processing your prescription into finished lenses.


Eyeglass Universe
Midwest Optical Associates, Inc.
8114 Paul Manors Drive, Suite 500
West Chester, OH, 45069-0219
Phone: (888) 989-3931
Text: (513) 338-4895
Fax: (855) 398-3937
Midwest Optical Associates, Inc. BBB Business Review