In my opinion, sunglasses are (almost) always a good idea. In winter and in summer.The sky can be so clear that it blinds you or your eyes can make you look like a panda -think white skin with black eyes.
Now that spring has officially arrived and summer is coming up, most of us will wear more and more sunnies. In my opinion, you can never have enough! (That's why I ordered a new pair yesterday ;) )
For sunglasses inspiration, take a look at this post.