Polycarbonate is a type of plastic lens material that is known for being lightweight, impact-resistant, and shatterproof. Compared to other lens materials such as glass, CR-39, and high-index plastic, polycarbonate lenses are generally considered to be a more durable and safer choice for eyewear.
Here are some key differences between polycarbonate and other lens materials:
1.Impact resistance: Polycarbonate lenses are highly impact-resistant, which makes them ideal for sports and other activities where eye protection is important. Glass lenses, on the other hand, are more likely to shatter upon impact, which can be dangerous.
2.Weight: Polycarbonate lenses are much lighter than glass lenses, which can make them more comfortable to wear for long periods of time.
3.Thickness: Polycarbonate lenses can be made thinner than glass lenses while still maintaining their impact-resistant properties. This makes them a good choice for people who need strong prescriptions.
4.Clarity: While polycarbonate lenses are known for their impact resistance, they can sometimes be less clear than other lens materials, especially when the prescription is strong. However, modern manufacturing techniques have improved the clarity of polycarbonate lenses in recent years.
5.Cost: Polycarbonate lenses are generally more expensive than CR-39 lenses, which are made from a type of plastic that is not as impact-resistant. However, they are often less expensive than high-index plastic lenses, which are designed to be thin and lightweight for people with strong prescriptions.PC Sunglasses polarized uv400 protection for men