R idley于1949年用聚甲基烯酸甲酯(polymethyl-methacrylate,PMMA)制造的人工晶状体植入后房,使视力得以恢复,1953年以来各种类型的前房型人工晶状体应运而生,1977年Shearing设计了J形袢后房型人工晶状体,从此人工晶状体又进入了后房时期随着科学技术的发展和显微手术的日趋成 Ridley’s intraocular lens, made of polymethyl-methacrylate (PMMA), was implanted in the posterior chamber in 1949 to restore visual acuity. Various types of anterior chamber intraocular lenses came into existence in 1953, and 1977 Shearing designed the J-shaped posterior chamber intraocular lens, since the intraocular lens has entered the back room period with the development of science and technology and the growing trend of microsurgery