Do I have to wear sunglasses to go to Tibet?

If you didn't grow up on the plateau, you must wear sunglasses. Strong ultraviolet rays on the plateau not only harm the eyes, but also cause unexpected damage to the skin. Wearing sunglasses can not only protect the eyes, but also prevent melanin deposition and prevent the skin from turning black. In addition, there are many snowy mountains on the plateau, which will produce strong glare in the sun. If the eyes are exposed to this environment for too long, it will cause temporary blindness or permanent blindness. In addition, if there are adverse reactions, if they are not treated immediately, they will be blind for a long time. This kind of blindness caused by snow reflection is called "snow blindness".

So I suggest that people who are new to the plateau or are not used to the environment must wear sunglasses.