What is the Difference Between Polycarbonate and Plastic?

The main differences between polycarbonate and plastic lenses are:

1. Durability: Polycarbonate lenses are thinner, lighter, and more impact-resistant than plastic lenses, making them suitable for people with higher prescriptions and those who require a strong, safe material for their eyewear.
2. Weight: Polycarbonate lenses are lighter than regular plastic or glass, making them more comfortable for people who wear glasses for extended periods.
3. Optical Clarity: Plastic lenses have a slightly higher optical clarity (Abbe value of 58) compared to polycarbonate lenses (Abbe value of 30).
4. UV Protection: Polycarbonate lenses have inherent UV protection, while plastic lenses require a separate UV coating.
5. Scratch Resistance: Polycarbonate lenses are more prone to scratching than plastic lenses, which may require the application of a scratch-resistant coating.
6. Cost: Plastic lenses are generally less expensive than polycarbonate lenses.

When choosing between plastic and polycarbonate lenses, consider factors such as personal preference, cost, weight, and the need for UV protection or impact resistance. Plastic lenses are a more affordable option for those who want to save money and don't have a very strong prescription, while polycarbonate lenses offer better durability, thinness, and lightness for those with higher prescriptions or specific needs.

Comparative Table: Polycarbonate vs Plastic

Polycarbonate and plastic (specifically acrylic) are both clear plastics used as replacements for glass in various applications. Here is a comparison table highlighting their differences:

Both polycarbonate and acrylic are lightweight, easy to clean, and have a variety of applications. However, polycarbonate is generally stronger and more impact-resistant than acrylic, making it more suitable for applications like bulletproof windows and safety equipment. On the other hand, acrylic is less expensive and has better scratch resistance, making it a more affordable alternative for windows, displays, and protective barriers.