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A hard coat (or anti-scratch coating) is a clear, durable coating applied to spectacle lenses. The main purpose is to protect the lens surface from minor scratches and abrasion. This coating is considered a fundamental layer for almost all modern plastic lenses.
read more about hard coat on lenses ...The hard coat is necessary because plastic and polycarbonate lens materials are naturally soft. Even minor contact with dust or fabric can cause surface scratches. The hard coat provides a protective, tougher surface that resists everyday abrasion.
The hard coat is typically a polymer resin that is chemically bonded to the lens surface and then cured, often with UV light. The coating is designed to be much harder than the lens material itself, increasing the overall durability.
No, a hard coat does not make lenses scratch-proof. It makes them scratch-resistant. While it protects against minor rubbing and abrasion, severe contact with rough materials or metal can still cause permanent scratches.
The hard coat helps your backup glasses last longer. This protection keeps the lenses clear, which is important for providing high-quality, comfortable vision when you need to switch from your contact lenses.
No, the hard coat is a clear, invisible layer that does not affect the clarity of the lens.
Yes, a hard coat is considered standard for almost all plastic and polycarbonate spectacle lenses sold today.
No, the hard coat must be applied by the lab before the lens is cut and mounted, as it requires a specific bonding and curing process.
Plastic lenses without a hard coat scratch almost instantly. If your vision is blurry due to thousands of fine scratches (haze), your contrast sensitivity will drop, making night driving dangerous. See your doctor to verify if your current lenses meet safety clarity standards.
FDA. Impact Resistant Lenses and Hard Coats (fda.gov). 2023.
ABDO. Spectacle Lens Materials and Coatings (abdo.org.uk). 2024.
The Vision Council. Laboratory Processing of Ophthalmic Lenses (thevisioncouncil.org). 2024.
AOA. Selecting Eyeglass Lenses (aoa.org). 2024.