How to read your optical prescription?Updated a month ago

Your prescription contains all the key details needed to make your lenses. Here’s what each term means:

🏥 Main terms:

• OD (Right Eye) / OS (Left Eye): Indicates which eye the correction is for.

• SPH (Sphere): Corrects nearsightedness (-) or farsightedness (+).

• CYL (Cylinder): Corrects astigmatism (if present).

• AXIS: Angle of astigmatism (from 0° to 180°).

• ADD: Additional correction for presbyopia (for multifocal/bifocal lenses).

📏 Additional measurements:

• PD (Pupillary Distance): Distance between your pupils, in mm.

• Fitting Height: Sometimes noted for progressive lenses.

💡 Example:

• OD: -2.25 SPH → nearsightedness of 2.25 diopters in your right eye.

• OS: +1.50 -0.75 x 90° → farsightedness with astigmatism in your left eye.

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