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