title: Bitoric rigid gas permeable contact lenses in the optical management of penetrating keratoplasty.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the complexity and effectiveness of fitting bitoric rigid gas permeable contact lenses (RGPCLs), compared to spherical RGPCLS, when used in the correction of high amounts of post-penetrating keratoplasty astigmatism.
  
  
  METHODS
  Records of post-penetrating keratoplasty (PKP) patients being managed with bitoric RGPCLs were compared to controls (post-PKP patients managed with spherical RGPCLs). Factors that were analyzed included the number of diagnostic RGPCLs used to assess the initial fit, the number of RGPCLs ordered to finalize the fit and the number of total doctor visits to finalize the fit.
  
  
  RESULTS
  Fourteen eyes of 14 patients satisfied the study criteria. The average amount of total astigmatism in this study group was 10.0D±5.0 compared to the control group which was 3.3D±2.6. The number of diagnostic RGPCLs used for the study group was 1.2±0.4 compared to 1.0±0.0 for the control group. The mean number of contact lenses ordered to complete the fitting for the study group was 1.9±0.7 compared to the control which was 2.1±0.8. The study group presented for an average of 6.3±1.6 visits whereas the control group presented for 4.9±1.1 visits. Contact lens corrected acuity for the study group was 0.101±0.11 (20/25) compared to the control group 0.08±0.12 (20/24).
  
  
  CONCLUSIONS
  The complexity of fitting bitoric RGPCLs was found to be similar to fitting spherical RGPCLs on post-PKP eyes and the visual outcomes were not different.
authors.affiliation: Jules Stein Eye Institute and Department of Ophthalmology, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095-7003, United States. Electronic address: vphan@jsei.ucla.edu.
authors.forename: Vivian A
authors.initials: VA
authors.lastname: Phan
authors.affiliation: Jules Stein Eye Institute and Department of Ophthalmology, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095-7003, United States. Electronic address: yoonkim@jsei.ucla.edu.
authors.forename: Yoon Hee
authors.initials: YH
authors.lastname: Kim
authors.affiliation: Jules Stein Eye Institute and Department of Ophthalmology, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095-7003, United States; Southern California College of Optometry, Fullerton, CA, United States. Electronic address: catcyang@gmail.com.
authors.forename: Catherine
authors.initials: C
authors.lastname: Yang
authors.affiliation: Jules Stein Eye Institute and Department of Ophthalmology, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095-7003, United States; Southern California College of Optometry, Fullerton, CA, United States. Electronic address: weissman@jsei.ucla.edu.
authors.forename: Barry A
authors.initials: BA
authors.lastname: Weissman
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001251:Astigmatism / Q000209:etiology / Q000628:therapy*; D003261:Contact Lenses; D003316:Corneal Diseases / Q000601:surgery; D019781:Corneal Topography; D005260:Female; D015590:Fluorophotometry; D006801:Humans; D015948:Keratoplasty, Penetrating; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000628:therapy*; D017755:Prosthesis Fitting; D012189:Retrospective Studies; D014792:Visual Acuity / Q000502:physiology
keywords: Bitoric lens; Contact lens; Penetrating Keratoplasty