title: Brown discoloration of acrylic hydrophobic intraocular lens.
abstract: OBJECTIVE
  We report a case series of brown discoloration of Abbott Medical Optics, USA, acrylic intraocular lens (IOLs; AABOO, ZCBOO, and ZMBOO) after cataract operation.
  
  
  METHODS
  Retrospective case series.
  
  
  METHODS
  Patients with brown discoloration of their IOLs postoperatively during the period from March 2013 to October 2013 at the Singapore National Eye Centre were consecutively identified.
  
  
  METHODS
  Distance best-corrected visual acuity (BCVA), intraocular pressure, slit-lamp examination, colour fundus photographs, flare meter reading, endothelial cell count, dilated fundus examination, as well as colour discrimination test on the Lanthony D 15 Hue test were performed.
  
  
  RESULTS
  Sixteen eyes of 14 patients were found to have evenly brown discoloration of varying degrees of acrylic IOL postphacoemulsification. This included 11 AABOO IOLs, 3 ZCBOO IOLs, and 2 ZMBOO IOLs. All had uneventful surgery except one who required anterior vitrectomy for posterior capsule rupture. One patient had uneventful operation but subsequently developed pigment dispersion glaucoma with tunnel vision and required a trabeculectomy. Mean time from operation to reporting date was 143 days (range 1-327 days). Pre- and postoperative month 6 BCVA was logMAR 0.54 and logMAR 0.13, respectively. None of the patients had loss of lines of BCVA. The desaturated Lanthony D 15 Hue test was abnormal in 8 out of the 16 eyes. None required IOL explantation.
  
  
  CONCLUSIONS
  Varying degrees of brown discoloration may occur in today's modern hydrophobic acrylic IOLs.
authors: Singapore National Eye Centre, Singapore; Singapore Eye Research Institute, Singapore.
authors: Melissa H Y
authors: MHY
authors: Wong
authors: Singapore National Eye Centre, Singapore; Singapore Eye Research Institute, Singapore; Post Graduate Medical School, Duke National University of Singapore, Singapore.
authors: Daniel Hsien-Wen
authors: DH
authors: Su
authors: Singapore National Eye Centre, Singapore; Singapore Eye Research Institute, Singapore; Post Graduate Medical School, Duke National University of Singapore, Singapore; Yong Loo Lin School of Medicine, National University of Singapore, Singapore. Electronic address: chee.soon.phaik@snec.com.sg.
authors: Soon-Phaik
authors: SP
authors: Chee
mesh_terms: D000180:Acrylic Resins; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D055253:Color Vision / Q000502:physiology; D005260:Female; D006801:Humans; D057927:Hydrophobic and Hydrophilic Interactions; D007429:Intraocular Pressure / Q000502:physiology; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D009887:Ophthalmoscopy; D018918:Phacoemulsification; D011475:Prosthesis Failure; D012189:Retrospective Studies; D014792:Visual Acuity / Q000502:physiology
chemical_list: D000180:Acrylic Resins