2. Add Your Prescription

How to read your prescription

Your prescription has a row for each eye: OD is the right eye and OS is the left. Copy the numbers exactly as written, including the + or − sign.

• SPH (sphere): the main power. Minus (−) means you see near better than far; plus (+) means you see far better than near.
• CYL (cylinder): a correction for astigmatism. Leave it at 0.00 if your prescription has none, or if it says “SPH” or “DS” there.
• AXIS: a number from 1 to 180 that goes with CYL. You only need it when CYL is set.
• ADD (addition): the extra reading power for progressive lenses, usually +0.75 to +3.50. It is the same for both eyes in most prescriptions.
• PD (pupillary distance): the distance between the centres of your pupils in millimetres, usually 54 to 74. Some prescriptions give two numbers, one per eye (for example 31/32); tick “2 PD Numbers” to enter them.

Not sure? Upload a photo of your prescription in the lens flow, or after you order on the order confirmation or the Track your order page, and we'll check it before we make your lenses.