While we often bask in the warmth of the sun through our windows, a new study reveals a concerning truth: sunlight can still damage our skin, even with the glass barrier. This is because while most windows block harmful UVB rays, UVA rays, which contribute to skin cancer, can penetrate through.
A study conducted in Saudi Arabia, where drivers were equipped with UV sensors, found that they were exposed to a UV index of up to 3.5. In Australia, a UV index of 3 or higher necessitates sun protection, as fair skin can burn in just 20 minutes. This highlights the potential for skin damage even while driving.
The type of glass plays a crucial role in UV protection. Laminated glass, commonly used in windshields, offers the best protection, blocking almost all UVA rays. However, tempered glass, often used in side and rear windows, allows a significant amount of UVA penetration, ranging from 4% to 56% depending on the car.
While tinted windows and UV protective films can significantly improve UVA filtration, it's important to remember that even with these measures, prolonged exposure can still lead to skin damage. Studies have shown a higher incidence of skin cancer on the side of the body exposed to the sun during driving, particularly on the left side in countries where drivers sit on the left.
The impact of UVA radiation extends beyond skin, affecting our eyes as well. Cataracts and other eye problems are more prevalent on the side of the body exposed to the sun during driving.
This discovery underscores the importance of being mindful of our exposure to sunlight, even through windows. While windows offer some protection, they are not a complete shield. Using sunscreen, wearing sunglasses, and minimizing direct sun exposure, especially during peak hours, are crucial steps towards safeguarding our skin health.