- UVA Rays:

 

  - These rays make up about 95% of the UV radiation that reaches the Earth. They penetrate deep into the skin and can cause long-term damage, like premature aging and the formation of wrinkles. UVA rays can also harm the eyes over time, leading to conditions such as cataracts and macular degeneration.

 

- UVB Rays:

 

  - These rays are shorter than UVA rays and are mostly responsible for causing sunburn and direct damage to the DNA in skin cells, which increases the risk of skin cancer. UVB rays are also linked to the development of corneal sunburn or photokeratitis, a painful eye condition.

 

 Why 100% UV Protection is Important

 

- Prevents Eye Damage: Prolonged exposure to UV rays can damage the eyes, leading to conditions like cataracts, pterygium (growth on the eye), and macular degeneration (damage to the retina). Sunglasses that block 100% of UVA and UVB rays provide crucial protection against these issues.

 

- Reduces Eye Strain: UV rays can cause eye strain, making it uncomfortable to be outside in bright sunlight. Sunglasses with 100% UV protection reduce the amount of light that reaches the eyes, making outdoor activities more comfortable and reducing the risk of headaches or fatigue caused by squinting.

 

- Protects the Skin Around the Eyes: UV radiation doesn’t just harm the eyes; it also affects the delicate skin around them, leading to wrinkles, dark spots, and skin cancer. Sunglasses that block all UV rays help protect the surrounding skin from damage.

 

 Key Features to Look For:

 

- "100% UV Protection" or "UV400" Labels: These labels ensure the sunglasses block both UVA and UVB rays. "UV400" means the sunglasses filter UV rays with wavelengths up to 400 nanometers, covering both UVA and UVB ranges.

 

- Wraparound or Oversized Styles: These designs offer better coverage, preventing UV rays from entering from the sides.

 

- Polarized Lenses (optional): Polarized lenses reduce glare, especially from reflective surfaces like water or snow, though polarization doesn’t necessarily indicate UV protection. Always ensure they also provide 100% UV protection.

 

Sunglasses that block 100% of UVA and UVB rays are essential for eye health and protection against long-term sun damage, making them an important part of your sun care routine.