Since the summer is coming near, and I can hardly bear the bright light, so I went to buy a pair of prescription sunglasses. It’s really a quite wonderful one, it has the photochromic lenses which means they can change their color according to different situations, when it’s dark outside, the lenses will become lighter; and when it’s light outside, the lenses will become darker. The prescription sunglasses really bring great convenience to my life, I don’t need to remove my sunglasses when I enter into the house.