title: Effect of round-edged acrylic intraocular lenses on preventing posterior capsule opacification.
abstract: OBJECTIVE
  To clarify the extent to which the adhesiveness of an acrylic material influences the formation of posterior capsule opacification (PCO).
  
  
  METHODS
  Jinshikai Medical Foundation, Nishi Eye Hospital, Osaka, Japan.
  
  
  METHODS
  Two types of AcrySof(R) intraocular lenses (IOLs) were prepared: round edged and tumbled. The AcrySof with round edges was implanted in 1 eye in a group of 4 rabbits and the tumbled IOL, in 1 eye in a group of 5 rabbits. In both groups, the contralateral eye received a conventional AcrySof with sharp optic edges. A histopathological examination was performed 3 weeks after surgery.
  
  
  RESULTS
  With the round-edged AcrySof IOL, no capsular bend formed at the optic edge and abundant lens epithelial cells (LECs) migrated posteriorly. With the sharp-edged AcrySof lens, a sharp capsular bend formed and LEC migration was significantly inhibited. In eyes with a tumbled IOL, a capsular bend was created, but it was less marked than that created by the sharp-edged lens and there was slightly more LEC migration posteriorly.
  
  
  CONCLUSIONS
  The AcrySof IOL lost its preventive effect on PCO when the optic was rounded. The effect of the AcrySof lens in preventing PCO is mainly a result of its rectangular, sharp-edged optic design. The acrylic material may play a complementary role by helping create a sharp capsular bend. Capsular bend formation is the key to the PCO preventive effect of an IOL.
authors: Nishi Eye Hospital, Osaka, Japan. okihiro@nishi-ganka.or.jp
authors: O
authors: O
authors: Nishi
authors: K
authors: K
authors: Nishi
authors: J
authors: J
authors: Akura
authors: T
authors: T
authors: Nagata
mesh_terms: D000180:Acrylic Resins; D000268:Adhesiveness; D000818:Animals; D002386:Cataract / Q000473:pathology / Q000517:prevention & control*; D007903:Lens Capsule, Crystalline / Q000473:pathology; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D011474:Prosthesis Design; D011817:Rabbits
chemical_list: D000180:Acrylic Resins