Lens Index and Material Guide
It is important to select the correct lenses as it is to select the correct frames. The lens material and lens index will influence the thin, light, durable, comfortable glasses. This user guide will define the lens index, specifics of how various materials perform, and what the best choice will be based on your prescription and your lifestyle.
What Is Lens Index?
The ability of the lens to focus the light in a manner that is efficient is called the lens index. A greater index implies that the lens can bend the light further and, therefore, it can be made thinner. This aids particularly in the case of strong prescriptions, whereby the normal lenses might appear thick and heavy. Lenses with a lower index are generally thicker and can be used in mild prescriptions.
Higher index lenses are thinner and lighter and stronger lenses are preferred with people who have difficulty concentrating. Photochromic lenses are convenient to people who pass between outdoors and indoors as they adapt to the lighting conditions. To ensure the longevity of usage of a product, it is possible to add a scratch-resistant coating to preserve your lenses.
| Lens Type | Best For | Range | Weight | Durability |
|---|---|---|---|---|
| 1.50 Standard Plastic (CR-39) | Best for full plastic frames even full-rim metal frames | Suitable For RX RANGE +1.00/-2.75 OR BELOW | Light | Moderate |
| 1.57 mod-normal index | Best for full-rim plastic or full-rim metal frames | RX RANGE +2.00/-3.75 OR BELOW | Up to 15% thinner than 1.50 lens | Moderate |
| 1.61 High Index | Best for full-rim plastic full-rim metal and half rim | FOR RX RANGE +3.00/-5.75 OR BELOW | Up to 10% thinner than 1.57 lens | Moderate |
| 1.67 High-Index | for full-rim plastic/acetate, full-rim metal, and rimless frames | Its RX RANGE +4.75/-6.75 OR BELOW | Up to 30% thinner than 1.50 lens | Moderate |
| 1.74 Ultra High-Index | For full-rim plastic/acetate or full-rim metal frames | FOR RX RANGE +5.00/-7.00 OR ABOVE | Up to 20% thinner than 1.61 lens | Moderate |
Trivex 1.53 Ultra-Lightweight Lens
Trivex 1.53 is an ultra-lightweight lens material best known for its clear and impact resistance. It is strong and comfortable for daily wear. These lenses are suitable for all frames, it is best for sports eyewear and children due to its durability and safety. Trivex lenses are best for prescriptions up to +2.00 / −3.00, offering UV protection, clear vision, with affordable price.
Polycarbonate 1.59 Impact Resistant
Polycarbonate 1.59 lenses are impact-resistant and made for safety, making them a famous option for children and active users. They are compatible with all frame styles and provide reliable performance for daily use. These lenses are best suited for prescription ranges up to +3.00 / −4.75, and can also be used for higher prescriptions in users who are 18 years and under.
How To Select A Lens That Fits You
- The standard plastic or polycarbonate lenses generally respond to mild prescriptions, whereas the high-index lenses are useful in stronger prescriptions.
- Consider what you do every day. Polycarbonate lenses are more appropriate in the case of an active person or when additional durability is required.
- Blue-light filtering can be applied to lessen eye strain if you use screens frequently.
- The anti-reflective coating may be a good solution to increase clarity and comfort (particularly when at night or in a bright environment).
- It should be lenses that suit your vision requirements and lifestyle, and not just looks.
Need help?
Frequently Asked Questions
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Lens index shows how thin or thick your lens are. Means a higher index means a thinner and lighter lens.
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There are different lens index
1. Low prescription: 1.56
2. Medium prescription: 1.67
3. High prescription: 1.74
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There are different materials but high-index plastic is best for comfort and thinness. And polycarbonate is best for safety and durability.
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Yes, thinner lenses look better, feel lighter, and are more easy to wear.