Ultrasound biomicroscopy and Scheimpflug photography of angle-supported phakic intraocular lens for high myopia.
OBJECTIVE
To evaluate the equivalence of Scheimpflug photography (SP) and ultrasound biomicroscopy (UBM) in determining corneal epithelium-intraocular lens (IOL) and border IOL-iris distances.


METHODS
Universität Erlangen-Nuremberg, Erlangen, Germany.


METHODS
In 26 eyes of 17 patients who had a NuVita MA20 angle-supported anterior chamber intraocular lens (Chiron-Domilens), SP and UBM were used to evaluate the distance between the endothelium and the anterior IOL face in central and peripheral regions (12 o'clock and 6 o'clock positions) and between the border of the anterior IOL face and the iris. The Wilcoxon test was used for statistical analysis.


RESULTS
The mean central endothelium-anterior IOL face distance was 2.01 mm and 2.00 mm by SP and UBM, respectively. The mean peripheral endothelium-anterior IOL border distance was 1.28 mm and 1.58 mm, respectively, and the mean peripheral anterior IOL face-iris distance, 0.89 mm and 0.75 mm, respectively.


CONCLUSIONS
The difference between the 2 methods in the central endothelium-anterior IOL face distance was not significant (methods were equivalent), but the difference in the peripheral endothelium-anterior IOL face distance was. This may be the result of difficulty in obtaining the exact transition point between the IOL and the haptics by SP examination. The difference between the 2 methods in the IOL border-iris distance was also significant because of the irregularity of the iris surface; therefore, measurements were performed at different sites along this structure. The significant differences in the peripheral endothelium-IOL and IOL border-iris distances indicate that although both methods are useful, they are not equivalent.
de Souza
Renate Ferreira
RF
Department of Ophthalmology, Federal University of São Paulo, Brazil. Renate.Ferreira@augen.imed.uni-erlangen.de
Allemann
Norma
N
Forseto
Adriana
A
Barros
Paulo S Moraes
PS
Chamon
Wallace
W
Nosé
Walton
W
D000328:Adult; D000869:Anterior Eye Segment / Q000000981:diagnostic imaging* / Q000601:surgery*; D002924:Ciliary Body / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D007498:Iris / Q000000981:diagnostic imaging; D019654:Lens Implantation, Intraocular; D007908:Lens, Crystalline / Q000502:physiology*; D007910:Lenses, Intraocular; D008297:Male; D009216:Myopia / Q000601:surgery*; D010781:Photography; D012029:Refraction, Ocular; D014463:Ultrasonography; D014792:Visual Acuity