Pupil Distance PD Measurement

What is PD?

Pupil distance is one of the most important measurements for clear vision in eyeglasses. Read about what is a pd and more.


Bifocals vs. Progressive Eyeglass Lenses

If you have a prescription for bifocal lenses, which means you need a different prescription for near and far, you may be wondering what lens options you might have. The most common question is: what is the difference between bifocal and progressive lenses?