How to Read a Progressive Glasses Prescription

A progressive glasses prescription can look complicated because it may contain several numbers for different types of vision correction. Common fields include sphere, cylinder, axis, and ADD power. Sphere generally describes the main refractive correction, while cylinder and axis describe astigmatism correction when needed.

ADD power refers to the additional correction intended for near vision. This is an important part of many progressive prescriptions because the lens provides multiple viewing distances.

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Do Not Guess the Numbers

Prescription values are specific to each eye and should come from a qualified eye-care professional. Pupillary distance and fitting measurements may also be needed when ordering. If anything on the prescription is unclear, ask the prescribing professional to explain it.

A correct prescription combined with accurate fitting information gives you the best starting point for comfortable progressive eyewear. Keep your prescription current and follow the lens provider's ordering instructions carefully.