N-(lower alkyl)-2-(3′-ureidobenzyl)pyrrolidines and N-(lower alkyl)-2-(3′-ureidobenzyl)-5-(lower alkyl)pyrrolidines of formula I
 wherein
   R¹ is lower alkyl and
   R² is lower alkyl or hydrogen, or a pharmaceutically acceptable salt thereof, or any single isomer or mixture of isomers thereof, useful for lowering intraocular pressure in mammals, for example, in the treatment of glaucoma.  
                            N-(低级烷基)-2-(3′-亚
脲基苄基)
吡咯烷和 N-(低级烷基)-2-(3′-亚
脲基苄基)-5-(低级烷基)
吡咯烷的式 I
 其中
R¹ 是低级烷基
R²为低级烷基或氢,或其药学上可接受的盐,或其任何单一异构体或异构体混合物,可用于降低哺乳动物的眼内压,例如治疗青光眼。