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What Ruins Polarized Sunglasses?

Published in Sunglasses Care 5 mins read

Polarized sunglasses can be ruined by a combination of improper cleaning techniques, exposure to extreme conditions, harsh chemicals, and physical damage. Understanding these factors is key to extending the life and maintaining the performance of your polarized lenses.

Common Ways Polarized Sunglasses Get Damaged

Protecting your polarized sunglasses means being mindful of how you clean, store, and expose them to the elements. Here's a detailed look at what can compromise their integrity:

1. Improper Cleaning Methods

The way you clean your polarized lenses is crucial. Using the wrong materials or water temperature can lead to irreversible damage.

  • Abrasive Materials: Using materials like paper towels or any standard cloth to dry or clean your lenses can scratch the delicate lens surface or the polarization film. These materials can be surprisingly abrasive or leave behind lint and dust, which can then scratch the lens when wiped. Always opt for a clean, soft microfiber cloth designed specifically for eyewear.
  • Hot Water: Avoid using hot water when cleaning your glasses. High temperatures can cause the lens material to warp or can damage the polarized film within the lens, leading to distortion or delamination. Lukewarm or cool water is ideal for rinsing.
  • Harsh Cleaning Solutions: Household glass cleaners, window cleaner, or solutions containing ammonia, alcohol, or other harsh chemicals can strip off protective coatings, damage the polarized film, or even degrade the lens material itself. Always use lens cleaning sprays specifically designed for eyewear or simply clean water.

2. Extreme Heat Exposure

Polarized lenses are often made with multiple layers, including a polarizing film sandwiched between lens materials. High temperatures can cause these layers to separate or "bubble," a process known as delamination, and can also warp the frames.

  • Leaving in a Hot Car: The dashboard of a car, especially on a sunny day, can reach extreme temperatures. This is one of the most common ways polarized sunglasses are ruined.
  • Direct Sunlight for Prolonged Periods: While designed for sun protection, leaving sunglasses in direct, intense sunlight for extended periods without proper ventilation can also cause heat damage.
  • Heat Sources: Placing them near heaters, radiators, or ovens can also be detrimental.

3. Chemical Exposure

Certain chemicals can be highly corrosive to lens coatings and the polarized film.

  • Solvents & Strong Cleaners: Paint thinners, nail polish remover, and industrial cleaners can dissolve lens materials or coatings.
  • Insect Repellent & Sunscreen: These products often contain chemicals that can react negatively with lens materials, leaving smudges or permanent damage. Always wash your hands after applying these products before touching your sunglasses.
  • Hairspray & Perfume: The aerosols and chemicals in these products can leave a sticky residue or a film that's difficult to remove without damaging the lenses.

4. Physical Damage

Accidents happen, but many types of physical damage can be prevented with careful handling and proper storage.

  • Scratches: Dropping sunglasses on hard surfaces, wiping them with dirty clothes, or storing them loose in a bag with keys and other objects can lead to irreparable scratches.
  • Impact: Sitting on your sunglasses, stepping on them, or subjecting them to strong impact can bend or break frames, crack lenses, or dislodge them.
  • Improper Storage: Not storing your sunglasses in a protective case allows them to be exposed to dust, dirt, and potential impacts.

5. Saltwater and Chlorine (if not rinsed)

While many polarized lenses are designed to be water-resistant, prolonged exposure to saltwater or chlorinated pool water without proper rinsing can cause issues.

  • Corrosion: Salt and chlorine can corrode metal frames and hinges over time.
  • Residue: When water evaporates, it leaves behind salt or chlorine residue that can dry on the lenses, potentially damaging coatings or causing streaks if not properly cleaned. Always rinse your sunglasses with fresh water after exposure to saltwater or chlorine, then dry with a microfiber cloth.

Prevention is Key: Protect Your Investment

To keep your polarized sunglasses in pristine condition, follow these simple tips:

  • Always use a protective case: A hard case is best for maximum protection against impacts and scratches.
  • Clean correctly: Use lukewarm water, a mild soap (if necessary), and a dedicated microfiber cloth. Avoid paper towels, standard cloths, and hot water.
  • Avoid extreme temperatures: Never leave your sunglasses in a hot car, especially on the dashboard.
  • Be mindful of chemicals: Keep them away from harsh cleaning products, insect repellents, and aerosols.
  • Handle with care: Pick them up by the frames, not the lenses, and avoid dropping them.
  • Rinse after saltwater/chlorine exposure: Wash thoroughly with fresh water and dry gently.

By understanding what harms polarized sunglasses and taking preventive measures, you can ensure they continue to provide optimal vision clarity and protection for years to come.

What Ruins Them Why It's Harmful How to Prevent It
Improper Cleaning Scratches, film damage, warping Use microfiber cloth, lukewarm water; avoid hot water, paper towels, standard cloths, and harsh chemicals.
Extreme Heat Exposure Warps frames, delaminates polarization film Don't leave in hot cars or direct sunlight.
Harsh Chemicals Strips coatings, damages lens material Keep away from solvents, strong cleaners, repellents, hairspray.
Physical Damage Scratches, cracks, breaks Use a hard case, handle with care, don't drop.
Improper Storage Lenses exposed to scratches, pressure Always store in a protective case.
Saltwater/Chlorine Corrodes frames, degrades lens coatings if not rinsed Rinse with fresh water after exposure.