Reading your prescription
Your prescription is issued to you by your eye doctor. If you had lost it, you can also check the box of your current lenses. Reading it is really simple and this guide will get you reading prescriptions like a pro in no time.
Just select your type of prescription below to get started.
O.D / Right Eye - O.D stands for Oculus Dexter, which means right eye.
O.S / Left Eye - O.S stands for Oculus Sinister, which means left eye. Don't ask us why it sounds like "evil eye".
Power / Sphere / Grade - Your power is the strength of your prescription. + means you are far-sighted, - means you are near-sighted (myopia).
B.C / Curve / Base Curve - Your base curve measures the curvature of your eye. The larger the number, the flatter your eye. An incorrect base curve may cause irritation or your lens to not sit properly in your eye.
Diameter / Dia / D - The diameter of your lens in millimeters. A correct diameter ensures proper vision and comfort for you.
Cylinder / Cyl - A cylinder is a part of your eye which requires different correction from the rest, and is also known as astigmatism. Lenses made for astigmatism are also known as toric lenses.
Axis - The axis is the measure of the position of your cylinder in degrees.
Add power/ Add / Addition - Add power is for us folks with presbyopia, and are found in multifocal lenses. It may be a number or a "low/medium/high" word with a max add. rating.
Fret not. Just upload a photo of your prescription or contact lens box when choosing your lens, and we'll take care of the hard work for you! Or click the bottom-right icon to chat with our friendly staff at any time.