老视是一种随着年龄增长而调节力逐渐下降的自然现象。 目前老视的机制尚未完全阐明，因此多种手术方法用于改善老视眼的调节。其中准分子激光手术成为矫正老视一种重要方法，而且其安全性及有效性不断进步。本文就老视的发生机制、治疗方法以及准分子激光矫正老视的手术方式和切削模式进行综述。

Presbyopia is the natural loss of accommodation that affects the majority of middle-aged individuals.Currently，because the mechanism of presbyopia is not completely understood, a variety of different kinds of surgical procedures have been considered for restoring accommodation to the presbyopic eye.The excimer laser has become an important adopted technology for presbyopia. With the advances in excimer lasers, clinical outcomes and safety with their use have improved. The purpose of this review is to outline the mechanism of presbyopia-and the treatment approaches with the excimer laser.