LENS INDEXES:
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Slightly thinner and more durable than 1.50, this lens type works well for prescriptions between ±2.00 and ±3.00. It offers a good balance between cost and performance for everyday use.
1.56 Index (Plastic)
These lenses are impact-resistant and lightweight, making them a great choice for children, sports use, or safety glasses. Ideal for prescriptions up to ±4.00, they also offer built-in UV protection.
1.59 Index (Polycarbonate)
Designed for higher prescriptions (±4.00 to ±8.00), these lenses are significantly thinner and lighter than lower-index options. They reduce lens bulge and edge thickness, making them more attractive and comfortable for strong prescriptions.
1.67 Index (Ultra High-Index)
The thinnest and lightest option available, 1.74 index lenses are ideal for very high prescriptions (above ±8.00). They provide the slimmest profile and best comfort without compromising optical quality with global use.
1.74 Index (Super High-Index)
LENS MATERIALS:
CR-39 (Plastic Lenses)
Also known as standard plastic, CR-39 lenses are lightweight and affordable with decent optical clarity. They are suitable for low prescriptions but can be thicker and less impact-resistant compared to other materials.
Polycarbonate
A popular choice for children’s glasses, safety eyewear, and sports frames, polycarbonate lenses are highly impact-resistant and lightweight. They also provide built-in UV protection but may have slightly lower optical clarity than CR-39.
High-Index Plastic
High-index plastic lenses are designed for stronger prescriptions. They are significantly thinner and lighter than standard plastic, offering improved comfort and a sleeker appearance, especially for people with high prescriptions.
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