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.


METHODS
Prospective observational case series.


METHODS
Eighteen eyes of nine patients were included.


METHODS
A Staar Collamer implantable PCPIOL was implanted for the correction of high myopia.


METHODS
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.
García-Feijoó
Julián
J
Instituto de Investigaciones Oftalmológicas Ramón Castroviejo, Hospital Clínico San Carlos, Universidad Complutense de Madrid, Madrid, Spain. Fundación Jiménez Díaz, Madrid, Spain.
Alfaro
Iñigo Jiménez
IJ
Cuiña-Sardiña
Ricardo
R
Méndez-Hernandez
Carmen
C
Del Castillo
José Manuel Benítez
JM
García-Sánchez
Julián
J
D000328:Adult; D002924:Ciliary Body / Q000000981:diagnostic imaging; D005129:Eye Foreign Bodies / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007498:Iris / Q000000981:diagnostic imaging*; D019654:Lens Implantation, Intraocular; D007908:Lens, Crystalline / Q000000981:diagnostic imaging*; D007910:Lenses, Intraocular; D008297:Male; D009216:Myopia / Q000601:surgery; D011446:Prospective Studies; D014463:Ultrasonography