title: Clear lens extraction and implantation of negative-power posterior chamber intraocular lenses to correct extreme myopia.
abstract: OBJECTIVE
  To evaluate the effectiveness, predictability, and safety of clear lens extraction to correct extreme myopia.
  
  
  METHODS
  Clinica de Nuestra Señora de la Concepción, Fundación Jiménez Díaz, Madrid, Spain.
  
  
  METHODS
  This retrospective study comprised 26 eyes of 17 highly myopic patients who had clear lens extraction and implantation of a negative-power posterior chamber intraocular lens (IOL). The IOL power was calculated using the SRK/T formula. Analyzed were visual and refractive results and intraoperative and postoperative complications. Follow-up was at least 12 months in all cases.
  
  
  RESULTS
  Uncorrected visual acuity improved in all cases, with 80.77% of eyes achieving 20/100 or better and 42.30%, 20/40 or better. Best spectacle-corrected visual acuity (BSCVA) improved in 23 eyes (88.46%). The percentage of eyes achieving a BSCVA of 20/100 or better increased from 73.07% preoperatively to 92.30% postoperatively and the percentage achieving 20/40 or better, from 23.07 to 73.07%. Of the 26 eyes, 76.91% were within 1.00 diopter (D) of refractive error and 96.16% were within 2.00 D. No intraoperative complications occurred. Although postoperatively 3 eyes (11.53%) developed choroidal detachment and 5 (19.23%) had an intraocular pressure greater than 25 mm Hg, all had a favorable outcome. Four eyes (15.38%) developed posterior capsule opacification and had a neodymium:YAG laser posterior capsulotomy 6 months postoperatively. No retinal detachments were observed.
  
  
  CONCLUSIONS
  Clear lens extraction with negative-power IOL implantation using the SRK/T formula had good effectiveness, acceptable predictability, and a low morbidity in eyes with extreme myopia over a short follow-up. A longer follow-up with more cases is needed to assess the safety of the procedure.
authors.affiliation: Department of Ophthalmology, Jiménez Diaz Foundation, Madrid, Spain.
authors.forename: I
authors.initials: I
authors.lastname: Jiménez-Alfaro
authors.forename: S
authors.initials: S
authors.lastname: Miguélez
authors.forename: J L
authors.initials: JL
authors.lastname: Bueno
authors.forename: P
authors.initials: P
authors.lastname: Puy
mesh_terms: D000328:Adult; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D019654:Lens Implantation, Intraocular; D007908:Lens, Crystalline / Q000601:surgery*; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000601:surgery*; D012029:Refraction, Ocular; D012189:Retrospective Studies; D012449:Safety; D014792:Visual Acuity