How Your Prescription Safety Glasses Are Made
About your order
What is pupil distance, or "PD"? How do I measure it?
What is segment height? How do I measure it?
What is a progressive (no-line) bifocal, and how do I measure segment height for progressive (no-line) bifocals?
Where do I enter my prescription in online? How to I fill out the prescription form?
What do the different lens options mean?