[Erratic6576]

Shady side is comfy but remember that 120 min of daily indirect or direct exposure to UVB can protect your eyesight health.

Just 120 min a day under a tree during childhood.

Dolgin, Elie. 2015. The myopia boom. Nature 519: 276.

Williams, Katie M., & al. 2017. Association Between Myopia, Ultraviolet B Radiation Exposure, Serum Vitamin D Concentrations, and Genetic Polymorphisms in Vitamin D Metabolic Pathways in a Multicountry European Study. JAMA Ophthalmology 135: 47-53. doi: 10.1001/jamaophthalmol.2016.4752. https://doi.org/10.1001/jamaophthalmol.2016.4752

[adav]

Does the glass block lots of UV?

[sitkack]

Glass blocks 100% of UVB and 25% of UVA. So while you wont burn, light through glass will still cause skin damage.

[urbandw311er]

Thanks - I learned something today.

Looks like some bus companies treat their windows to block the UVA as well. Eg https://www.valleymetro.org/blog/2022/07/how-valley-metro-ke...

[sitkack]

We need a little UVB everyday to maintain melanin (skin pigment) and skin thickness. If you work inside M-F and then go hard on the weekends outdoors, you will receive disproportionate damage from sunlight.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3427189/

https://www.who.int/news-room/questions-and-answers/item/rad...

If you are blocking UVB, you should be blocking UVA as well. The bus folks are doing some good thinking.

[Erratic6576]

So travelling for hours on the sunny side of the bus won't do anything to protect our kids’ eyesight?