Here are some important things to know about the lenses on your sunglass in Sri Lanka:
1. UV Protection
· Purpose: Sunglasses should block 100% of UVA and UVB rays to protect your eyes from harmful solar radiation. UV exposure can lead to cataracts, macular degeneration, and other eye problems.
· Label Check: When buying sunglasses online in Sri Lanka, look for labels that say "100% UV protection" or "UV400."
2. Lens Material
· Glass: Offers the best optical clarity and scratch resistance but is heavier and can shatter.
· Plastic: Lightweight and more impact-resistant but can scratch more easily unless treated with coatings.
· Polycarbonate: Lightweight, impact-resistant, and offers good UV protection, ideal for sports and outdoor activities.
· Trivex: Similar to polycarbonate, but with better optical clarity and scratch resistance.
3. Polarization
· What It Does: Polarized men’s sunglasses in Sri Lanka reduce glare from reflective surfaces like water, snow, and glass, making them great for driving or outdoor activities.
· Not UV Protection: Polarization does not provide extra UV protection; it simply reduces glare for better comfort.
4. Lens Colour
· Gray/Green: Reduces overall brightness while preserving true colour perception, making them good for all-purpose use.
· Brown/Amber: Enhances contrast and depth perception, ideal for outdoor activities in variable light conditions.
· Yellow/Gold: Great for low-light conditions and improving contrast, often used in foggy or overcast weather.
· Blue/Purple: Mostly for aesthetic purposes but can help reduce glare in certain environments.
5. Coatings
· Anti-Reflective Coating: Reduces reflections and glare from light hitting the back of the lenses.
· Mirror Coating: Reflects light away, reducing the amount of light that reaches your eyes, great for bright conditions.
· Scratch-Resistant Coating: Protects against minor abrasions and increases lens durability.
· Hydrophobic Coating: Repels water and makes it easier to clean.
6. Lens Tints and Darkness
· Darker Lenses: Do not necessarily provide more UV protection, but they can reduce overall brightness, making them more comfortable in very bright conditions.
· Gradient Lenses: Darker at the top and lighter at the bottom, useful for activities like driving, where you need to block overhead sunlight but still see the dashboard clearly.
7. Impact Resistance
· If you are involved in sports or high-risk activities, impact-resistant lenses (such as polycarbonate or Trivex) are essential for protecting your eyes from debris or accidents.
8. Prescription Lenses
· Men’s and women’s sunglasses in Sri Lanka can also be fitted with prescription lenses, allowing you to see clearly while protecting your eyes from the sun.
Knowing these factors can help you choose the best sunglasses for your lifestyle, ensuring both comfort and protection.