Yes if untreated. Some retinal diseases can cause severe vision loss or blindness. Luckily, it can be prevented if you take good care of your eyes by visiting the hospital in time.
Ultraviolet light damages the eyes. The reflective power of snow, sand and water magnifies the effect.
So, what is ultraviolet light? It is a form of electromagnetic radiation with wavelength from 10nm to 40nm UV radiation is present in sunlight and constitutes about 10% of the total electromagnetic radiation output from the sun.So, basically, UV penetrates clouds. And sunglasses should block 99 to 100 percent of UVA and UVS ( two bands of ultraviolet light)