How to Read Your Eye Prescription

Before ordering prescription eyewear from cinilyglasses.com, use the prescription issued by your eye care professional. Keep the right-eye and left-eye values separate and copy every plus or minus sign exactly.

Common prescription terms

• OD / OS: right eye / left eye.
• SPH: the spherical lens power.
• CYL and AXIS: the amount and orientation of astigmatism correction, when prescribed.
• ADD: additional near-vision power, when prescribed.
• PD: pupillary distance, measured in millimeters.

Before you order

Do not guess missing values or change your prescription. If a field is unclear, ask your eye care professional to confirm it. Lens availability and suitability depend on the prescription and frame.

See our ordering information checklist, PD guide and lens guide. For ordering help, contact service@cinilyglasses.com.