Have you ever wondered if your glasses and contact lens prescriptions are the same? Many people in Trinidad & Tobago assume they can use one for the other—but that’s not the case. Glasses vs. contact lens prescriptions are different because they’re designed to correct vision in unique ways. In this guide, we’ll break down the differences, show you how to understand each, and help you make the right choice for your eyes.
Why Glasses and Contact Lens Prescriptions Differ
Your eyes may need the same correction strength, but glasses and contacts sit at different distances from your eyes. Glasses rest a short distance away, while contact lenses sit directly on the eye’s surface.
This small change affects how your vision is corrected, which is why you can’t simply swap prescriptions.
- Glasses Prescription: Adjusted for lenses sitting 12mm–14mm from your eyes.
-
Contact Lens Prescription: Customized to the shape, curve, and size of your eye.
Key Elements of a Glasses Prescription
Your glasses prescription includes several measurements:
- SPH (Sphere): Indicates nearsightedness (-) or farsightedness (+).
- CYL (Cylinder) & AXIS: Used if you have astigmatism.
- ADD: Extra power for reading or progressive lenses.
- PD (Pupillary Distance): Distance between your pupils for lens alignment.
👉 Want more detail? Check our guide on how to read a glasses prescription.
What Makes a Contact Lens Prescription Unique
A contact lens prescription includes all the above measurements plus extra details that make it specific:
- Base Curve (BC): Ensures the lens fits the curvature of your eye.
- Diameter (DIA): Determines how the lens covers your cornea.
- Lens Brand/Type: Contacts must be prescribed by brand and material.
This is why an optometrist’s exam is essential before buying contact lenses.
Can You Convert One Prescription Into the Other?
This is a common question: “Can I use my glasses prescription for contacts?” The short answer: No.
While both correct your vision, only an eye care professional can provide a proper contact lens prescription. Attempting to guess could cause:
- Blurry vision
- Eye strain
- Headaches
- In some cases, discomfort or eye infections
Buying Prescription Glasses Online in Trinidad & Tobago
At Reflexa, we make it easy to order your prescription glasses online. Once you have your updated prescription, you can:
- Explore our men’s glasses collection.
- Find stylish women’s eyewear.
- Try frames virtually with our Virtual Try-On.
Frequently Asked Questions
1. Is my contact lens prescription the same as my glasses?
No. Contacts require additional measurements for fit and comfort.
2. Can I get contact lenses without a prescription?
In Trinidad & Tobago, a valid prescription is required for safe and effective use.
3. How do I know if my glasses prescription is wrong?
Common signs include blurred vision, headaches, or eye strain. Always revisit your optometrist if these appear.
4. Can new prescription glasses cause headaches?
Yes, temporarily. Your eyes may need a few days to adjust to a new prescription.
Conclusion
Glasses and contact lens prescriptions are not interchangeable—they’re designed to meet different needs. Understanding this difference helps you protect your eyes, avoid discomfort, and get the best vision correction possible.
✨ Ready to find your perfect pair? Explore our collection of prescription glasses today and enjoy shopping with Reflexa’s trusted online store in Trinidad & Tobago.
Leave a comment
This site is protected by hCaptcha and the hCaptcha Privacy Policy and Terms of Service apply.