Your "scratch resistant" lenses can still become scratched because the coating, while durable, is not entirely scratch-proof and can be damaged by improper care, harsh chemicals, or extreme temperatures.
It's important to understand that "scratch resistant" coatings add a layer of protection to your lenses, making them more durable than untreated lenses. However, they do not make the lenses impervious to all damage. Think of it as a shield that can withstand many daily hazards but can still be compromised under certain conditions.
Common Reasons Your Lenses Get Scratched
Even with a scratch-resistant coating, your lenses can still sustain damage. Based on common issues, including information from our reference, here are some primary culprits:
- Mishandling and Improper Cleaning: One of the most frequent reasons lenses become scratched is simply how they are handled and cleaned. Wiping lenses dry, especially with abrasive materials like clothing, paper towels, or tissues, can easily grind tiny particles into the lens surface, leading to scratches over time. Your glasses were mishandled or cleaned improperly.
- Using Harsh Chemicals: Certain substances can degrade or strip the scratch-resistant coating, leaving the lens surface vulnerable. You used too harsh of a chemical (such as a household cleaner), ammonia-based products, or acetone (found in nail polish remover) on your lenses. These cleaners are too aggressive for delicate lens coatings.
- Exposure to Extreme Temperatures: High heat can cause the lens material and coating to expand at different rates, leading to cracks or crazing (tiny spiderweb-like cracks) in the coating. Similarly, extreme cold followed by rapid warming can also stress the coating. The lens coating became damaged due to exposure to excessive heat or cold. Examples include leaving glasses on a hot dashboard or exposing them to freezing temperatures.
- Accidental Drops and Contact: While coatings help, dropping your glasses on a hard surface or having them rub against keys, coins, or other sharp objects in a pocket or bag can still overwhelm the protective layer and scratch the lens.
- Wear and Tear: Over a long period, even careful use can result in microscopic abrasions that eventually become noticeable scratches.
Preventing Scratches on Your Lenses
Taking proper care of your glasses is the best way to maintain the integrity of the scratch-resistant coating:
- Clean Properly: Always rinse your lenses with lukewarm water before wiping to remove abrasive particles. Use a lens cleaning solution specifically designed for eyeglasses and a clean microfiber cloth.
- Use the Right Cloth: Only use a dedicated microfiber cleaning cloth. Avoid paper towels, tissues, or clothing, as these can scratch.
- Avoid Harsh Chemicals: Never use household cleaners, window cleaner, or strong solvents on your lenses.
- Store Safely: When not wearing your glasses, keep them in a protective case to prevent contact with other objects.
- Avoid Temperature Extremes: Don't leave your glasses in a hot car or expose them to extreme cold followed by rapid temperature changes.
By understanding the limitations of "scratch resistant" coatings and practicing good lens care habits, you can significantly extend the life and clarity of your lenses.
