December 2002
Volume 43, Issue 13
Free
ARVO Annual Meeting Abstract  |   December 2002
Ultrasound Biomicroscopy Examination of Silicon Posterior Chamber Phakic Intraocular Lens for Myopia
Author Affiliations & Notes
  • J Garcia-Feijoo
    Ophthalmology Inst Ramon Castroviejo Univ Comp Madrid Spain
  • J Hernández-Matamoros
    Centro Oftalmológico Real Vision Madrid Spain
  • C Méndez-Hernández
    Ophthalmology Inst Ramon Castroviejo Univ Comp Madrid Spain
  • A Castillo-Gómez
    Ophthalmology Inst Ramon Castroviejo Univ Comp Madrid Spain
  • A Fernandez Vidal
    Ophthalmology Inst Ramon Castroviejo Univ Comp Madrid Spain
  • C Lazaro
    Centro Oftalmológico Real Vision Madrid Spain
  • J García-Sánchez
    Ophthalmology Inst Ramon Castroviejo Univ Comp Madrid Spain
  • Footnotes
    Commercial Relationships   J. Garcia-Feijoo, None; J. Hernández-Matamoros, None; C. Méndez-Hernández, None; A. Castillo-Gómez, None; A. Fernandez Vidal, None; C. Lazaro, None; J. García-Sánchez, None.
Investigative Ophthalmology & Visual Science December 2002, Vol.43, 449. doi:
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    • Get Citation

      J Garcia-Feijoo, J Hernández-Matamoros, C Méndez-Hernández, A Castillo-Gómez, A Fernandez Vidal, C Lazaro, J García-Sánchez; Ultrasound Biomicroscopy Examination of Silicon Posterior Chamber Phakic Intraocular Lens for Myopia . Invest. Ophthalmol. Vis. Sci. 2002;43(13):449.

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Abstract

Abstract: : Purpose: To study the intraocular position and the anatomic relationships of PRL-III (Phakic Refractive Lens) posterior chamber phakic intraocular lens (PCPIOL) for myopia using ultrasound biomicroscopy. Methods:The UBM 840 (Zeiss-Humphrey, 50 MHz) was used to examine 18 phakic myopic eyes of 10 patients (8 women and 2 men; mean age: 26,8 SD 2,3) that had undergone silicone PCPIOL implantation (PRL model 101, Medennium Inc, Irvine, CA, USA). The examinations were performed under standard illumination and accommodation conditions by the same examiner. Hourly radial and transversal sections were taken, thus providing 360º coverage of the anterior chamber and a section of the anterior chamber through the corneal apex and centered in the pupil was performed. PRL position was determine and central distance between the corneal endothelium and the PRL was measured. PRL-crystalline lens peripheral distance was only measured in the minor axis of PRL edge as silicone produces numerous artifacts which lead to erroneous measurements. We also determined the PRL- iris contact area. Results: In our series 8 eyes had both haptics in zonule and 5 eyes had both in the ciliary sulcus and 1 had both impacted in the ciliary body. The 4 remaining eyes had mixed positions (table 2). We observed that the PRL axis remained in the horizontal meridian (± 10º) in 12 eyes (50%), it rotated 90±10 º in 3 eyes, and 45±10 º in 3 eyes. The mean PRL - endothelium distance was 2137,7 SD 511,2 µm, mean PRL crystalline lens peripheral distance was 622,3 SD 241,4 µm. The mean PRL-iris contact in the mayor axis was 1802,7 SD 1191,6 µm. Conclusion: The PRL implantation is a safe technique in the short term. However, the sulcus location of the haptics in many cases and the PRL-iris contact suggest caution regarding the long term and make us consider that it would be advisable to have lens of different diameters available or perhaps to perform small changes in their design.

Keywords: 432 imaging methods (CT, FA, ICG, MRI, OCT, RTA, SLO, ultrasound) • 551 refractive surgery: phakic IOL 
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