Ultrasound biomicroscopy examination of posterior chamber phakic intraocular lens position.

OBJECTIVE To better elucidate the in vivo position of the Collamer posterior chamber phakic intraocular lens (PCPIOL) and its relationship to the iris and the crystalline lens and to analyze possible variations over time. DESIGN Prospective observational case series. PARTICIPANTS Eighteen eyes of nine patients were included. INTERVENTION A Staar Collamer implantable PCPIOL was implanted for the correction of high myopia. MAIN OUTCOME MEASURES The eyes were studied with a 50-MHz ultrasound biomicroscopy UBM 840. The exact PCPIOL position and the distances between it and the crystalline lens were measured at 3, 6, and 12 months after surgery. RESULTS There were no intraoperative complications. In 13 eyes (72.22%), contact between the PCPIOL and the crystalline lens was found at some time during follow-up. In 3 eyes (16.6%), central contact could be demonstrated. We also observed that the contact zone and its extension can vary over time. In 2 eyes, rotation of the lens was observed. CONCLUSIONS We found contact between the PCPIOL and the crystalline lens in a high percentage of cases. There was also mobility of the lens in the posterior chamber, especially in the anteroposterior plane, and, as a consequence, both the contact zone and its extension would vary over time.

[1]  J. García-Feijóo,et al.  Ultrasound biomicroscopy in pars planitis. , 1996, American journal of ophthalmology.

[2]  D. Sanders,et al.  Implantable contact lens for moderate to high myopia: Phase 1 FDA clinical study with 6 month follow‐up , 1998, Journal of cataract and refractive surgery.

[3]  J. García-Feijóo,et al.  Ultrasound biomicroscopy of ZSAL‐4 anterior chamber phakic intraocular lens for high myopia , 2001, Journal of cataract and refractive surgery.

[4]  J. García-Feijóo,et al.  Safety of posterior chamber phakic intraocular lenses for the correction of high myopia: anterior segment changes after posterior chamber phakic intraocular lens implantation. , 2001, Ophthalmology.

[5]  W. Haigis,et al.  Posterior chamber myopia lenses in phakic eyes , 1996, Journal of cataract and refractive surgery.

[6]  F. Foster,et al.  Ultrasound characterization of normal ocular tissue in the frequency range from 50 MHz to 100 MHz , 1995, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[7]  C Tello,et al.  Measurement of ultrasound biomicroscopy images: intraobserver and interobserver reliability. , 1994, Investigative ophthalmology & visual science.

[8]  S. Cronemberger,et al.  Ultrasound biomicroscopic imaging of posterior chamber phakic intraocular lens. , 1998, Journal of refractive surgery.

[9]  J. M. D. del Castillo,et al.  Chronic subclinical inflammation in phakic eyes with intraocular lenses to correct myopia , 1996, Journal of cataract and refractive surgery.

[10]  J. Brandt,et al.  Pigmentary dispersion syndrome induced by a posterior chamber phakic refractive lens. , 2001, American journal of ophthalmology-glaucoma.

[11]  S. Ziémba,et al.  Staar Collamer intraocular lens: Clinical results from the Phase I FDA core study , 1998, Journal of cataract and refractive surgery.

[12]  R. Zaldívar,et al.  Combined posterior chamber phakic intraocular lens and laser in situ keratomileusis: bioptics for extreme myopia. , 1999, Journal of refractive surgery.

[13]  R. Zaldívar,et al.  Posterior chamber phakic intraocular lens for myopia of -8 to -19 diopters. , 1998, Journal of refractive surgery.

[14]  S. F. Urbak.  Ultrasound biomicroscopy. III. Accuracy and agreement of measurements. , 1999, Acta ophthalmologica Scandinavica.

[15]  Helmut Ermert,et al.  In vivo ultrasound biomicroscopy , 1993 .

[16]  D J Coleman,et al.  Very high frequency ultrasound analysis of a new phakic posterior chamber intraocular lens in situ. , 1998, American journal of ophthalmology.

[17]  O. Bergès,et al.  Ultrasound biomicroscopy of Baikoff anterior chamber phakic intraocular lenses. , 1997, Journal of refractive surgery.

[18]  F. Pereira,et al.  Cataract formation after posterior chamber phakic intraocular lens implantation , 1998, Journal of cataract and refractive surgery.

[19]  E. Rosen,et al.  Cataract development after implantation of the Staar Collamer posterior chamber phakic lens. , 1999, Journal of cataract and refractive surgery.

[20]  F. Foster,et al.  Clinical use of ultrasound biomicroscopy. , 1991, Ophthalmology.

[21]  P. Pesando,et al.  Collamer intraocular contact lens to correct high myopia , 1996, Journal of cataract and refractive surgery.

[22]  F. Foster,et al.  Subsurface ultrasound microscopic imaging of the intact eye. , 1990, Ophthalmology.

[23]  J. García-Feijóo,et al.  Orbital cup. A device to facilitate ultrasound biomicroscopic examination of pars plana and peripheral retina. , 1997, Archives of ophthalmology.

[24]  P. Othenin-Girard,et al.  Implantable contact lens for moderate to high myopia: Short‐term follow‐up of 2 models , 2001, Journal of cataract and refractive surgery.

[25]  P. Pesando,et al.  Posterior chamber collamer phakic intraocular lens for myopia and hyperopia. , 1999, Journal of refractive surgery.

[26]  F. Jansson,et al.  DETERMINATION OF THE VELOCITY OF ULTRASOUND IN OCULAR TISSUES AT DIFFERENT TEMPERATURES , 1961, Acta ophthalmologica.

[27]  E. Rosen,et al.  Staar Collamer posterior chamber phakic intraocular lens to correct myopia and hyperopia , 1998, Journal of cataract and refractive surgery.

[28]  H. Freudiger,et al.  [Echographic measurement of eyeball length in pseudophakic eyes]. , 1984, Klinische Monatsblatter fur Augenheilkunde.