OD :
Oculus dexter, Latin term for right eye.

OS :
Oculus sinister, Latin term for left eye.

PD :
Pupillary distance, is the distance between your pupils in millimeters. This is an essential information for your prescription glasses. You can find how to measure PD by yourself on our FAQ session.

Sphere, indicates the amount of lens power to correct nearsightedness or farsightedness.

Cylinder, indicates the amount of lens power for astigmatism. The number in the cylinder column may be preceded with a minus sign (for the correction of nearsighted astigmatism) or a plus sign (for farsighted astigmatism).

Axis is defined with a number from 1 to 180 and describes the lens meridian that contains no cylinder power to correct astigmatism.

Added magnifying power to correct presbyopia.

Placing an order with prescription 



Checklist before ordering?   We’ll help you get organized

You will need to gather two items before you can start your order:

1. an eyeglasses prescription (no, not the one for your contacts! You should go see an optometrist to get this) and

2. your pupillary distance (PD).


What is pupillary distance (PD) and how do I get mine?

PD stands for Pupillary Distance, it’s the measurement (distance) between the center of one pupil to the center of the other (in millimeters). Your optometrist should have this on your prescription, if not no worries you can measure + figure out your distance here.

  1. Stand 8 in. away from the mirror.
  2. With your face straight, hold the ruler against your brow.
  3. Close your right eye and align the ruler’s zero to the center of your left pupil.
  4. While looking straight, open your right eye and read the mm line that lines up with the center of your right pupil.
  5. Measure your PD 3-4 times to assure it is accurate and consistent.* An average PD for an adult ranges between 57 and 65 mm.* Additional Tip: Another great way to get your PD measurement is with a help from a friend. 1) Enlist your favorite person 2) Grab a ruler and place it right on top of your eyebrow 3) Take a photo 4) measure your PD of the photo.That’s it! It’s a super simple method that helps you get a really precise measurement.


I have both of those items, now what?!

You can scan them or take a photo and email it to us. Some people like to write their PD on their prescription others send in both separately… whatever floats your boat. We’ll be patiently waiting!