Weather and climate affect eyewear in ways that go beyond the obvious choice of sunglasses on a bright day — humidity, temperature, and even altitude all interact with frames and lenses in ways worth understanding if you live somewhere with real seasonal variation.
Heat and humidity
High heat can cause some frame materials, particularly certain plastics, to soften slightly and lose shape faster over time, while humidity increases the likelihood of lens fogging and can accelerate wear on certain coatings. Metal frames generally hold up better in humid conditions than lower-quality plastics, though genuine corrosion resistance depends heavily on the specific metal and finish used.
Cold and dry conditions
Cold weather makes some acetate frames more brittle and prone to cracking if flexed too far, particularly older or lower-quality acetate. Dry indoor heating during winter can also worsen dry eye symptoms for people already prone to them, which sometimes gets mistakenly attributed to the glasses themselves rather than the environment.
Altitude and intense sun exposure
UV exposure increases with altitude, since there’s less atmosphere to filter it — a genuinely relevant fact for anyone doing serious hiking or mountain activity, where sunglasses with confirmed UV400 protection matter more than they might at sea level. Snow and water both reflect significant additional UV and visible light, compounding exposure well beyond what direct sunlight alone would suggest.
What this means practically
None of this means needing a different pair of glasses for every season, but it’s worth choosing frame materials and lens treatments that suit your actual climate and lifestyle rather than assuming any well-made pair performs identically everywhere. Someone in a consistently humid climate has different practical priorities than someone doing regular high-altitude activity, and it’s a reasonable thing to mention during a proper fitting rather than assume doesn’t matter.
Want glasses that lift you? Trend Optic is an independent eyewear boutique in Middle Park, Melbourne. Walk in, or book a private 45-minute fitting. We do not do eye tests in Melbourne, so bring a current prescription from your own optometrist.