渐进镜与近视的控制

Progressive addition lens and control of myopia

渐进镜自20世纪50年代始应用于老视的矫治。近年来随着近视“离焦”学说的提出以及近视患者调节明显滞后现象的发现,佩戴渐进镜因能减少调节刺激、提高调节准确度而可能成为延缓近视发展的方法。尽管近几年有关渐进镜控制近视的研究较多,但其临床效果说法不一。就近视的发病机制、渐进镜的作用机制以及几个主要的相关研究尤其是其优缺点进行综述。

Progressive addition lens （ PALs ） , named after its special design of a progressive refractive index along the corridor to the lower part of the lens for near vision, has been originally used to correct presbyopia since 1950s. With the recent introduction of ＂retinal defoeus＂ hypothesis of myopia and the finding of relatively obvious accommodation lag in myopes, PALs becomes one of the options to retard myopia progression by decreasing accommodation stimuli and improving accommodation accuracy. Although there were numerous clinical trials on its treatment effect compared with others, we can not draw conclusive results yet. This review summarized the pathogenesis of myopia, the possible rational for PALs to control myopia and try to evaluate the most recent well-designed relevant studies with the focusing on their advantages and disadvantages.