title: [Analysis of patients with extraction of open-loop anterior chamber intraocular lenses].
abstract: OBJECTIVE
  To analyze the cause of flexible open-loop anterior chamber intraocular lenses (AC-IOL) extraction and to evaluate the safety of these lenses implantation.
  
  
  METHODS
  This retrospective study comprised 28 patients (28 eyes) who had received open-loop AC-IOL extraction from 1999 to 2009 in our hospital. Several factors of these patients were analyzed, including the type of AC-IOL, primary disease, the intraocular duration of AC-IOL, the cause of AC-IOL extraction and therapeutic result.
  
  
  RESULTS
  All of the AC-IOL used were modern flexible open-loop AC-IOL. Twenty one patients were implanted AC-IOL because of ocular trauma; the average intraocular duration of the AC-IOL was (6.1 ± 3.1) years. In the causes of AC-IOL extraction, bullous keratopathy was the most common cause, accounted for 42.9% (12/28); secondary glaucoma, retinal detachment and lens dislocation accounted for 32.1% (9/28), 17.9% (5/28) and 7.1% (2/28), respectively. In the 12 cases with bullous keratopathy, 6 cases just received AC-IOL extraction and the others received penetrate corneal transplantation. Six cases with secondary glaucoma received AC-IOL extraction combined with trabeculectomy.
  
  
  CONCLUSIONS
  Bullous keratopathy and secondary glaucoma are the two most common causes for open-loop AC-IOL extraction. The patients who will receive AC-IOL implantation need an adequate selection and must be followed properly.
authors.affiliation: Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao 266071, China.
authors.forename: Yun-hai
authors.initials: YH
authors.lastname: Dai
authors.forename: Li-xin
authors.initials: LX
authors.lastname: Xie
authors.forename: Yu-sen
authors.initials: YS
authors.lastname: Huang
authors.forename: Xiao-ming
authors.initials: XM
authors.lastname: Wu
authors.forename: Hui
authors.initials: H
authors.lastname: Zhang
authors.forename: Jie
authors.initials: J
authors.lastname: Lan
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000867:Anterior Chamber / Q000601:surgery*; D002648:Child; D020878:Device Removal; D005260:Female; D006801:Humans; D007910:Lenses, Intraocular / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D055815:Young Adult