What is PD (Pupillary Distance) and Why is it Important for Eyewear Fitting?
When you visit an optical store to get your glasses, have you ever wondered why the staff uses a device that looks like a binocular or a ruler to measure your eyes? This process is called measuring the PD (Pupillary Distance).
If you're unfamiliar with what PD is and why it matters for eye measurement and glasses fitting, let’s dive into the details!
What is PD (Pupillary Distance)?
Pupillary Distance (PD) is the distance between the center of the pupils of both eyes, measured in millimeters (mm). This measurement is crucial in eyeglasses fitting. When ordering glasses, the PD ensures that the lenses are positioned correctly and aligned with your pupils, providing you with a comfortable and effective pair of glasses. Proper PD measurement helps ensure you get the most accurate vision and comfort.
This is especially important for individuals with complex prescriptions, multiple prescriptions, or those needing progressive lenses. The accuracy of the PD is essential for ensuring that the lenses work optimally for your vision.
What Happens If PD is Not Measured or Is Incorrect?
If the PD measurement is skipped or if the PD is incorrect, you might experience the following issues:
- Blurry Vision: If the lenses are not properly aligned with your pupils, your vision may not be as sharp as it should be.
- Eye Strain and Fatigue: Misaligned lenses force your eyes to work harder to focus, which can lead to discomfort, fatigue, and strain.
- Headaches and Eye Pain: Due to improper lens alignment, your eyes may have to work overtime to focus, which can cause headaches and eye pain.
- Double Vision: In some cases, especially when looking at distant objects, the misalignment can cause double vision.
Why is PD Measurement So Important for Progressive Lenses?
Progressive lenses, which provide different focal lengths in one lens, require highly accurate PD measurements. Even a small discrepancy in PD can result in blurry or distorted vision, making the need for accurate measurement even more critical for those using progressive lenses.
How Does BVAX Standard Ensure Accuracy in PD Measurement?
At Monde Eyewear, we take PD measurement seriously. We use the BVAX 16-step standard for precise eye measurement, ensuring that your glasses are customized for maximum comfort and visual clarity. Our expert staff conducts detailed eye exams and ensures that every step, including PD measurement, is accurately performed.
Free PD Measurement and Eye Exam Services
We offer free eye exams and PD measurements in all our stores. Our optometrists ensure accurate readings and guide you toward the best lens options based on your unique vision needs.
For eye exams, glasses fitting, or advice on eye health, contact us:
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