I want to buy a new pair of lenses for my glasses我想买副新镜片

今天的几个句子是有关买眼镜的：1. Let me see your frame. 我看看您的镜架。 2. My degree of nearsightedness is -4.0. 我眼睛是400度。 3. You should buy this brand. 那买这个牌子吧。