You Have a High Prescription. Here's What That Actually Means.
A strong prescription changes the way lenses have to be made. The higher the prescription number — whether you're nearsighted, farsighted, or dealing with significant astigmatism — the more the lens has to bend light to bring the world into focus. More bending means more material, and more material means thickness. This is the core challenge of high prescription glasses, and it's one that Eye Candy Delafield specializes in solving with both optical precision and genuine style.
If you've ever been handed a pair of glasses with noticeably thick edges and a distortion that makes your eyes look magnified or shrunken behind the lenses, you already know what's at stake. The good news: that's no longer the inevitable outcome. With the right lens materials and the right frames, high prescription lenses can be lighter, thinner, and far more aesthetically pleasing than you might expect.
The Case for High Index Lenses
High index lenses are the single most important upgrade available to anyone with a strong prescription. Here's why: standard plastic lenses bend light at a fixed rate. High index lenses — made from a denser material — bend light more efficiently, which means the lens doesn't need to be as thick to achieve the same level of visual acuity. The result is a noticeably thinner, lighter lens that sits better in the frame and looks far less noticeable on your face.
High index glasses come in several grades, typically measured by their refractive index (1.67, 1.74, and beyond). The higher the index number, the thinner the lens for a given prescription. For very high prescriptions, the difference between a standard plastic lens and a 1.74 high index lens is dramatic — we're talking about a reduction in lens thickness that fundamentally changes the look and weight of your eyewear. When combined with an anti-reflective coating — which is crucial for high index lenses, since they reflect more light than standard lenses — the result is clear vision with none of the glare or visual noise that can come with thick lenses.
Not all lens materials are created equal, and for high prescriptions, the choice of material matters more than most people realize. Here's a practical look at your main options:
- High index plastic is the go-to recommendation for most people with strong prescriptions. It offers the best combination of thinness, lightweight comfort, and optical quality. High index plastic at 1.67 or 1.74 will significantly reduce lens edges compared to standard plastic lenses, making it a great choice for a wide range of frame styles.
- Polycarbonate lenses are a good choice when impact resistance and lightweight wear are the priority — they're thinner than standard plastic and nearly shatterproof, making them suitable for active lifestyles or younger wearers. Their optical clarity is slightly behind high index plastic at very high prescriptions, but for moderate to strong prescriptions, polycarbonate lenses perform extremely well.
- Standard plastic lenses are the most affordable option but not well-suited to high prescriptions. The coke bottle effect — that thick, heavy lens appearance — is most associated with standard plastic, and it's worth investing in a better material to avoid it.
At Eye Candy Delafield, we'll walk you through each option in the context of your specific prescription, so you can make a confident, informed decision.
Selecting Frames That Work With Your Prescription
This is where a lot of people go wrong when selecting frames for a high prescription, and it's something we take seriously at Eye Candy Delafield. Frame size and shape have a direct impact on how thick your lenses will appear — even with high index material. Smaller frames mean less lens surface area, which means the lens edges are less exposed and the overall thickness is reduced. This makes small frames and narrow shapes — oval frames in particular — an excellent starting point for anyone managing a strong prescription.
Wide frames require larger lenses, and larger lenses mean the edges extend further from the optical center of the prescription. That's where distortion and edge thickness become noticeable. If a wide frame is calling your name, we can help you assess whether the proportions will work with your specific prescription, and what lens material will best minimize any visual downsides.
Semi rimless frames and rimless frames are worth considering for the right prescription range. Without a full frame surrounding the lens, the edges are less visually prominent, which can make thick lenses far less noticeable. That said, semi rimless and rimless designs aren't ideal for every high prescription — very high prescriptions can put stress on unframed lenses — so we'll always help you find a frame that's both stylish and structurally suitable for your vision needs.
Progressive Lenses and High Prescriptions
If you wear progressive lenses and have a strong prescription, the combination requires especially thoughtful frame selection. Progressives need a certain vertical lens height to fit the distance, intermediate, and near zones properly, which means overly narrow frames can compromise your vision. Pair that with a high prescription, and the stakes for getting the right frames are even higher.
At Eye Candy Delafield, we fit progressive lenses with precision — measuring pupillary distance, fitting height, and frame width to make sure your new glasses deliver the full range of clear vision you need, without unnecessary weight or eye strain. A well-fitted progressive in a high index lens, seated in the right frame, is one of the most functional and elegant pairs of glasses a person can wear. We'd love to help you find exactly that.
Anti-Reflective Coating: Not Optional for High Prescriptions
For most prescriptions, anti-reflective coating is a nice upgrade. For strong prescriptions, it's essential. Here's why: high index lenses, by their very nature, reflect more light than standard plastic or polycarbonate lenses. Without an anti-reflective coating, that extra reflectivity shows up as distracting glare on the front of your lenses — both for you and for the people looking at you. It undermines the clarity you're paying for and draws attention to the lenses themselves rather than to your face.
Anti-reflective coating solves this by allowing light to pass cleanly through the lens rather than bouncing off the surface. The practical result is sharper, more comfortable vision — especially in low light, on screens, and while driving at night. The cosmetic result is equally important: your lenses become virtually invisible, which means people see your eyes, not your glasses. For anyone who has felt self-conscious about thick or noticeable lenses in the past, a quality anti-reflective coating combined with high index material is one of the most meaningful improvements you can make. At Eye Candy Delafield, we include lens coating guidance as part of every prescription consultation — because the right coating is just as important as the right lens.
Come Find Your Perfect Pair at Eye Candy Delafield
Strong prescriptions deserve better than a compromised result. Whether you're choosing your first pair of high index glasses, upgrading from thick lenses you've tolerated for years, or simply looking for new glasses that feel like a true reflection of your personal style, Eye Candy Delafield is the place to start. Our team will assess your prescription, guide you through the best lens materials, and help you find eyeglass frames that draw attention for all the right reasons.
Visit us in Delafield or explore our range of frames online. Your next pair of glasses should feel great, look great, and work beautifully — and we won't stop until they do.
