Abstract
To assess whether iris-claw intraocular lenses (IOLs) undergo gravitation-dependent changes in position and refraction. Tertiary referral center, Bern, Switzerland. Observational case study. Patients with a history of pars plana vitrectomy and IOL exchange with implantation of an aphakic iris-claw IOL (Artisan) were included in this study. Objective refraction was obtained with a handheld autorefractometer, and the IOL position was measured by ultrasound biomicroscopy with the patient prone, sitting, and supine. Twenty-one eyes of 19 patients with retropupilary IOLs (13) or prepupillary IOLs (8) were included. The mean spherical equivalent (SE) in the sitting position was -0.81 diopter (D)±0.95 (SD), and the mean distance from the endothelium to the anterior edge of the IOL was 3.35±0.72mm. The mean SE in the supine position was -0.61±1.28 D, whereas the mean SE in the prone position was -1.34±1.17 D (P=.0030). The IOL position changed from 3.50mm in the supine position to 3.06mm in the prone position (P<.0001). The aphakic iris-claw IOL was subject to significant movement related to gravity. The change in the refractive effect suggests that there is a degree of pseudoaccommodation caused by the forward shift of the aphakic IOL in the face-down position. None of the authors has a financial or proprietary interest in any material or method mentioned.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
