Guide to Reading Your Eyeglass Prescription

When you leave the eye doctor’s office with a new prescription, the printout can look like a confusing mix of letters and numbers. At Vision Associates of Westland, Dr. Michael Pack, OD, helps patients understand their eye health and vision needs in clear, simple terms. Here’s a quick guide to help you make sense of what your prescription means.

Key Parts of an Eyeglass Prescription

• OD and OS – These abbreviations stand for your right eye (OD) and left eye (OS). Sometimes you’ll also see OU, which means both eyes.
• SPH (Sphere) – This number indicates nearsightedness or farsightedness. A minus sign (–) means nearsightedness, while a plus sign (+) means farsightedness.
• CYL (Cylinder) – This value shows whether you have astigmatism, a common condition in which the eye’s surface isn’t perfectly round.
• Axis – This number works with the cylinder value to tell the lab exactly how to position the correction for your astigmatism.
• ADD – Found mostly in prescriptions for bifocals or progressive lenses, this number helps with close-up vision, such as reading.
• Prism – Occasionally included to correct eye alignment issues.

What Your Numbers Mean

Every prescription is customized for your vision. For example, a higher SPH number means a stronger correction is needed. If you see numbers in the CYL and Axis columns, that means you need correction for astigmatism. These details help the optical lab create personalized lenses.

Understanding Astigmatism and Its Treatment

Astigmatism is one of the most common reasons people wear glasses. It happens when the eye’s curvature causes light to bend unevenly, leading to blurred or distorted vision. Fortunately, with today’s advanced lenses and contact lens options, astigmatism treatment is straightforward and effective. If you’re looking for an optometrist near you for help managing astigmatism, Dr. Pack provides customized solutions right here in Westland, MI.

Why a Clear Prescription Matters

Even a small error in your prescription can affect clarity and comfort. That’s why it’s important to keep up with regular eye exams. They not only ensure you have the right prescription but also allow your optometrist to monitor for changes in your overall eye health.

Get Expert Care in Westland

Whether you need a routine exam, astigmatism treatment, or help choosing the right lenses, Dr. Michael Pack and his team at Vision Associates of Westland are here to answer your questions and make sure you feel confident about your vision care.

If you’re due for an eye exam, schedule a visit to our office in Westland, MI, by calling (734) 326-2160.