Anmeldung zur Tagung
Registration
Grußwort
Invitation
Themen
Topics
Allgemeiner Ablauf
General overview
Wissenschaftliches Programm
Scientific program
Kurse
Courses
Symposien
Symposiums
Frühstück mit Spezialisten
Breakfast with specialists
Arzthelferinnen-Fortbildung
Rahmenprogramm
Social program
DOG Information
DOG Information
Allgemeine Informationen
General Information
Autorenindex
Index of Authors
Ausstellerliste
Exhibitors
Sponsoren
Sponsors
Teilnahmegebühren
Registration fees
Impressum
Surgical induced astigmatism and stability of rotation after implantation of the Artisan™ toric phakic intraocular lens
Tehrani M., Schwenn O., Dick H. B.
Augenklinik, Johannes-Gutenberg-Universität, Mainz
Introduction: The implantation of the toric iris-claw phakic IOL
(Artisan™ Toric Phakic™) is a new option in refractive surgery
for the correction of astigmatic ametropia. This new toric IOL has an
optic diameter of 5.0 mm with a spherical anterior and a toric posterior
surface. Myopia can be corrected from -3 to -20 D, Hyperopia from +2 to
12D and corneal astigmatism up to 7D.
Purpose: To evaluate surgical induced astigmatism and stability
of rotation in 21 eyes.
Methods: We conducted a prospective study of 21 eyes of 12 patients
(mean age, 36 years) with high amentropia and corneal astigmatism, operated
between January 2000 and 2001. All underwent uncomplicated implantation
of the toric phakic IOL through a superior sclero-corneal incision. After
a follow-up of at least 6 months, BCVA, keratometry, cylinder axis and
astigmatism analysis were investigated. Vector analysis was performed
using a computerized videokeratographic analysis system preoperatively
and 6 month postoperatively. Preoperative spherical equivalent refraction
in myopic eyes (n=14) ranged from - 21 to -4.5 (mean -10.29 D) and a cylindric
equivalent from -5.0 to -1.75D (mean: -3.64 D). Preoperative spherical
equivalent refraction in hyperopic eyes (n=7) ranged from +3.75 to -5.75
(mean 4.3 D) and a cylindric equivalent from -4.0 to - 2D (mean: -3.39D).
Results: After a mean follow up of six months 95% of the patients
had a refraction within+/- 1D of emmentropia. A BCVA of 20/30 or better
was observed in 85% of eyes. 3 eyes gained 1 line, four gained 2 lines
and seven eyes gained more than 2 lines. No lost of line was observed
(CVA). The deviation from target axis was 4°(range 13 to 0°) in
mean. Astigmatic correction remained stable during the postoperative follow-up.
The mean surgically induced astigmatism by the method of Jaffe and Clayman
was -0.11D (range-1.60 - 0.78), determinated by Naeser - 0.29D (range
-1.59 - 1.14). The double angle scatter (Holladay) showed an astigmatism
reduction.
Conclusion: Our results suggest that the implantation of an Artisan™
toric phakic IOL is an effective and predictable method for the correction
of high ametropia with astigmatism. A stable refractive outcome can be
achieved without rotation of the phakic IOL over time. The astigmatic
analysis demonstrated a slight against the rule shift as a result of the
superior approach.