All topics
How to Choose Your Lens Thickness | Lens Index & Package Guide
When customizing your glasses, selecting the right lens thickness (known as the Lens Index) is the most important step to make sure your frames look great and feel lightweight.
To make things completely stress-free, our website does the heavy lifting for you! Once you enter your vision prescription at checkout, our system will automatically analyze your numbers and recommend the absolute best lens package for your specific vision needs.
If you want to understand how our optical laboratory custom-crafts these options, here is a simple breakdown of how lens thickness works, our specific packages, and frame compatibility rules.
What is a "Lens Index" and What Are Lenses Made From?
The "Index" is simply a technical number that measures how efficiently a lens material bends light. The higher the index number, the thinner and lighter the lens will be.
Depending on the package you select, our laboratory utilizes different high-quality materials to maximize your visual clarity:
1.50 Standard Index (CR-39 Plastic): Our standard, durable plastic lenses. These are ideal for weak-to-moderate prescriptions ranging between -1.75 and +1.75. For stronger prescriptions, standard lenses can become heavy or look thick around the edges of the frame.
1.59 Index (Polycarbonate): The gold standard for active lifestyles. Polycarbonate is a specialized high-impact resistant safety material that is 10 times more impact-resistant than standard plastic. It is up to 22% thinner than basic lenses and is highly recommended for children's glasses, sports frames, and prescriptions around +/- 4.00.
1.61 Index (High-Index): A premium, lightweight plastic material designed to reduce weight. These lenses are up to 20% to 25% thinner than standard lenses and work beautifully for prescriptions ranging from -4.00 to +3.00.
1.67 Index (Super Thin / Ultra-Thin): A high-tech material engineered to eliminate the "coke-bottle" look. These lenses are up to 32% to 40% thinner than standard options, making them the optimal choice for moderate-to-high prescriptions ranging from -8.00 to +6.00.
1.74 Index (Our Thinnest Lenses): Reserved for exceptionally strong prescriptions. If your vision requirements are beyond the standard limits, these ultra-thin configurations are available by contacting our Customer Care team after placing your order (subject to prescription eligibility).
Eyeglasses Lens Packages Explained
Depending on whether you choose a Home Brand frame or a Premium Brand frame, our website will display one of two custom menu tracks:
Track A: Home Brand Eyeglasses Packages
If you select a Home Brand frame, your thickness and coating choices are bundled into these specific packages:
Essential: Includes standard 1.5 Index basic lenses. Best for light prescriptions.
Advanced: Features standard 1.5 Index basic lenses bundled with full protective coatings (Scratch-Resistant, UV Protective, and Anti-Reflective).
Polycarbonate: Upgrades you to 1.59 Index high-impact resistant polycarbonate safety lenses (up to 22% thinner) alongside full protective coatings.
Enhanced: Upgrades you to 1.61 Index Lite & Thin lenses (up to 25% thinner) alongside full protective coatings.
Premium: Our ultimate home-brand option. Features 1.67 Index super-thin lenses (up to 35% thinner), Scratch-Resistant protection, enhanced UV400 block, Premium Anti-Reflective coating, a free prescription card, and a future order discount.
Track B: Premium Eyeglasses Packages
If you select a Designer or Premium frame, the packages feature enhanced lens brands tailored to luxury frames:
Basic: Includes standard 1.5 Index basic lenses.
Gold: Features premium 1.5 Index ClearViz© lenses bundled with anti-scratch, 100% UV-block, and anti-reflective surface coatings.
Polycarbonate: Upgrades your frame to 1.59 Index high-impact resistant safety lenses (up to 22% thinner) with full protective coatings.
Platinum: Features 1.61 Index featherweight G-vision© lenses (up to 30% thinner) with anti-scratch, 100% UV-block, and anti-reflective coatings.
Diamond: Our highest premium tier. Features 1.67 Index G-vision© ultra-thin lenses (up to 40% thinner), anti-scratch, maximum UVA/UVB UV-block, Enhanced Anti-Reflective coatings, and a free prescription card.
Prescription Sunglasses Packages
When ordering prescription sunglasses, the packages shift to prioritize absolute sun protection and rich color tints:
Value Package: Features 1.5 Index standard-thickness lenses. Recommended for lower prescriptions (-1.75 to +1.75). Includes full UV400 protection to block harmful ultraviolet rays.
Standard Package (Lite and Thin): Features lightweight 1.60 Index lenses that are up to 20% thinner than the Value option. This package adds an extra Scratch-Resistant coating alongside standard UV400 protection.
Super Package (Super Thin): Features ultra-lightweight 1.67 Index lenses that are up to 32% thinner than the basic value package. Built with high-index performance, this option keeps stronger prescriptions looking sleek and includes both Scratch-Resistant and UV400 protection.
Frame Restrictions: Prescription Clip-On Sunglasses
Are you planning to use a magnetic clip-on sun shade with your new prescription glasses? Please be aware of this specific optical limitation:
⚠️ The Clip-On Exclusion Rule: If your doctor's prescription slip features a high positive (+) Sphere (SPH) value, custom clip-on accessories are not recommended. Lenses with strong positive sphere powers naturally bulge or protrude forward from the center of the frame. This physical curve prevents a magnetic clip-on from sitting securely or clipping flat against the eyeglasses.
Please note: The higher the index, the thinner the lens. Important: not all lens indexes will be available for all frames and prescription types.Tip: Need more help? Click 👉 here to place an order with a live agent.