眼镜是镶嵌在框架内的透镜镜片，戴在眼睛前方，以改善视力、保护眼睛或作装饰用途。亦有特制眼镜供观看3D立体影像或虚拟真实影像。

眼镜可矫正多种视力问题，包括近视、远视、散光、老花或斜视等，但不能医治或根治这些问题。其他种类的眼镜包括护目镜、太阳眼镜、游泳镜等，为眼睛提供各种保护。

现代的眼镜，通常在镜片中间设有鼻托（鼻梁撑），及在左右两臂搁在耳朵上的位置设有软垫，而另外也有隐形眼镜。

爱美或不习惯佩戴眼镜的人，可以选择以隐形眼镜矫正视力。虽然近年隐形眼镜及激光矫视手术越来越普及，但眼镜仍然是最普遍的矫正视力工具。

Glasses, also known as eyeglasses or spectacles, are devices consisting of lenses mounted in a frame that holds them in front of a person's eyes. Glasses are typically used for vision correction. Safety glasses provide eye protection against flying debris or against visible and near-visible light or radiation. Sunglasses allow better vision in bright daylight, and may protect one's eyes against damage from high levels of ultraviolet light. Specialized glasses may be used for viewing specific visual information (such as stereoscopy). Sometimes glasses are worn simply for aesthetic or fashion purposes. The number of Americans who are nearsighted has doubled since the 1970s and almost 3/4 of the US population wears glasses. People are more likely to need glasses the older they get with 93% of people between the age of 65-75 wearing corrective lenses.