how to read a glasses prescription

When you receive a glasses prescription in Quebec, it’s essential to understand the terms and numbers on it. A glasses prescription is a key document that indicates the corrections needed to improve your vision. Whether you need glasses for near vision, distance vision, or both, we’ll explain in detail what a glasses prescription in Quebec contains, and how to read it to make informed decisions when choosing your frames and lenses.

Your Information and the Optometrist’s Information

The prescription usually begins with your personal information, including your name, address, and the date of the exam. The contact information of the optometrist who performed the exam is also included. Make sure this information is correct, as it identifies you as the patient and indicates who prescribed the glasses.

Refraction Measurements

The most crucial part of the prescription is the refraction measurement. It reveals the correction power needed for your vision, whether for near vision, distance vision, or both. The main components of the refraction measurement are as follows:

The sphere indicates the correction power for nearsightedness (myopia) or farsightedness (hyperopia). Sphere values can be positive (+) or negative (-). For example, an SPH of -2.50 D indicates that you are nearsighted.

The cylinder indicates the correction power needed to correct astigmatism. Astigmatism is an irregular curvature of the cornea that causes blurred vision. The cylinder is usually preceded by a (+) or (-) sign and is expressed in diopters. For example, a CYL of -1.00 D indicates astigmatism.

The axis is a number that goes along with the cylinder and indicates the orientation of the astigmatism in degrees. The axis usually ranges from 0 to 180 degrees.

The addition (ADD) is the correction power needed for near vision. This mainly applies to progressive or bifocal lenses, and is expressed in diopters.

Reading and Intermediate Distances

If you need glasses specifically for reading or working on a computer, the prescription may include specific values for these distances. These values are listed under the terms “ADD” or “DPC” (Distance Point Convergence).

Prism and Base

In some prescriptions, you may find prism and base values, usually indicated as “Prism Base.” This indicates a correction for eye convergence issues. If these values are present, it means you have an eye coordination disorder that requires prismatic correction.

Other Information

Finally, the prescription may contain other information, such as specific recommendations from the eye care professional or guidance on the type of lenses to use. You might find advice on lens material, anti-reflective coatings, or special instructions related to your eye health.

How to use your prescription

Once you have your prescription in hand, it’s time to put it to use to get the perfect glasses. Book an appointment with a qualified optician to guide you in choosing frames and lenses suited to your prescription. Your optician will use the information on your prescription to help you achieve clear, comfortable vision.

Be sure to follow your eye care professional’s recommendations. It’s also essential to update your prescription regularly to ensure optimal vision. The health of your eyes is precious, and an accurate glasses prescription is essential for maintaining clear, comfortable vision every day.

At Art D’y Voir in Montreal, we understand the importance of reading a glasses prescription in Quebec. Our team of eyewear professionals is here to guide you in choosing frames and lenses that match your visual needs while catering to your style preferences. Feel free to visit us for personalized advice and to discover our selection of trendy glasses. We’re here to help you see the world more clearly, and in style.