檢視渐进多焦点镜片的原始碼

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|<center>'''渐进多焦点镜片'''<br><img
src="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fcbu01.alicdn.com%2Fimg%2Fibank%2F2020%2F711%2F662%2F17905266117_909137876.jpg&refer=http%3A%2F%2Fcbu01.alicdn.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1683080173&t=cfe254117b1b372cc0fb8a31f37b961b" width="280"></center><small>  圖片來自优酷</small> 
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渐进[[多焦点镜片]]也称为渐进片，顾名思义一只镜片上有多个焦点。如果从焦点来划分，可以把镜片划分为[[单焦点镜片]]、[[双焦点镜片]]、多焦点镜片。
我们最常见的镜片就是单焦点镜片，镜片上只有一个光度；双焦点镜片就是双光镜片，以前很多老年人用来解决看远同时看近的问题，但由于本身的重大缺点和渐进多焦点的普及，双光镜片已经基本被淘汰；多焦点镜片作为镜片发展史上的一座里程碑，也将是以后科学家研发和市场普及的主要方向。