Objective To evaluate the efficiency of the treatment in vitreoretinal surgery combined with different operating method for dislacation of lens in vitreous. Methods During operation on 29 eyes with Marfan syndrom and traumatic and cataract surgical dislocation of lens and serious semiluxation ,different operating method according to different cases were applied, such as lensectomy and vitrectomy, phacofragmentation , application of perfluorocarhon liquids. Results The dislocated lens and serious semiluxatio...