The Must-Have Details to Order Glasses Online: Your Prescription Numbers Explained
Your prescription is the foundation of clear vision when you order glasses online. After your eye exam, your optometrist provides a document with specific numbers that tell lens makers exactly what you need. OD (oculus dexter) shows your right eye measurements, while OS (oculus sinister) covers your left. SPH (sphere) corrects nearsightedness or farsightedness. CYL (cylinder) and AXIS address astigmatism. ADD indicates magnification power for reading or progressive lenses. Most prescriptions expire one to two years after your exam date—your eye doctor sets this timeline. BonLook optometrists can verify your prescription is current and help you understand these values during your next visit. Keep your prescription handy; online retailers require these exact measurements to craft lenses that match your vision needs perfectly.
Ordering glasses online combines convenience with style, but success depends on having the right information upfront. Whether you're a first-time buyer or simply refreshing your look, knowing what details you need—from prescription numbers to pupillary distance—makes the process smooth and stress-free. This guide walks you through each essential piece of information, so you can confidently choose frames that fit your face, match your vibe, and deliver crystal-clear vision.
Before You Click 'Place Order': Double-Check Fit, Comfort, and Your Final Prescription Info
Before finalizing your purchase, take a moment to review everything carefully. Confirm that:
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Your prescription details match exactly what your eye doctor provided (sphere, cylinder, axis, and add values)
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Your pupillary distance (PD) is accurate and entered correctly
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The frame measurements align with your face shape and comfort preferences
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Lens options—such as blue-light filtering or anti-reflective coatings—suit your daily needs
Double-checking these details now saves time and ensures your new glasses deliver the vision and comfort you expect. BonLook's team is always available to answer questions and help verify your order details before you complete checkout.
How to Ask Your Eye Doctor for a Copy of Your Glasses Prescription (No Awkwardness Needed)
Requesting your prescription is simpler than you might think—it's your right, and optometrists expect it. In Canada, eye doctors are legally required to provide you with a copy of your prescription after your exam, even if you don't ask. That said, being proactive ensures you leave the appointment with everything you need.
Here's how to make the request smoothly:
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At the end of your exam, simply say: 'Could I get a copy of my prescription, please?' Most clinics hand it over immediately.
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If you forgot to ask, call or email the clinic afterward. A quick message like, 'Hi, I'd like a copy of my prescription from my recent exam' is all it takes.
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Mention you're ordering online if you feel comfortable. Many doctors of optometry appreciate transparency and may even offer helpful tips for your online purchase.
What if the clinic seems hesitant?
Some optical offices also sell frames and may prefer you buy from them. Stay polite but firm: 'I understand, but I'd like to explore my options online.' Remember, your prescription belongs to you, and requesting it is entirely normal.
What you'll receive:
Your prescription will include key values like sphere (SPH), cylinder (CYL), axis, and sometimes an add power for multifocal lenses. If your pupillary distance (PD) isn't listed, don't worry—we'll cover how to get that measurement in the next section.
BonLook's optometrists are always happy to help you understand your prescription and guide you through the online ordering process. If you're ever unsure about your prescription details or need a fresh exam, book an appointment with our team to ensure your glasses are tailored perfectly to your vision needs.
Pupillary Distance (PD): The One Measurement You May Need to Request for Online Orders
Your pupillary distance measures the space between your pupils in millimeters—a critical number that ensures your lenses align properly with your eyes. While most prescriptions include sphere, cylinder, and axis values, PD often gets left off the paperwork.
Why PD matters:
- Centers the optical zone of each lens directly in front of your pupils
- Reduces eye strain and visual distortion
- Ensures clear, comfortable vision through your new frames
If your prescription doesn't list PD, simply ask your eye doctor during your next visit. Many optometrists measure it automatically during eye exams and can provide it upon request. You can also measure it yourself at home using a ruler and mirror, though professional measurement offers greater accuracy when ordering glasses online.
Choose Frames Like a Style Pro: Face Shape, Outfit Vibes, and Trendy Looks That Work
Selecting frames goes beyond picking what catches your eye—it's about finding shapes that complement your face structure and align with your personal style. Oval faces pair well with most frame shapes, while round faces benefit from angular styles that add definition. Square faces soften with rounded or oval frames, and heart-shaped faces look balanced in bottom-heavy or aviator styles.
Your wardrobe matters too. Classic tortoiseshell or black frames work with professional attire, while bold colours or geometric shapes make a statement with casual looks. BonLook's curated collection offers trend-forward options designed in Montreal, ensuring you'll discover frames that reflect your unique personality—whether you lean minimalist, vintage-inspired, or fashion-bold.
Before You Click 'Place Order': Double-Check Fit, Comfort, and Your Final Prescription Info
Take a moment to review everything before finalizing your purchase. Confirm that your prescription values—sphere, cylinder, axis, and add power—match exactly what your eye doctor provided. Double-check your pupillary distance (PD) measurement; even a small error can affect lens centering and visual clarity.
Review the frame dimensions you selected:
- Lens width — ensures the frames suit your face size
- Bridge width — affects how the glasses rest on your nose
- Temple length — determines comfort around your ears
If something feels uncertain, BonLook's team is ready to guide you through any questions about fit or prescription details before you complete your order.
