The present study should investigate the influence of a capsular tension ring on postoperative rotational stability of a plate haptic hydrophilic acrylic intraocular lens. All patients will be operated on both eyes in one occasion. Both eyes receive a Zeiss 409MP plate haptic intraocular lens, while only on eye receives an additional capsular tension ring. Follow up visits take place 1 hour, 1 week, 1 month and 4 to 7 months after surgery. At the follow up visits, the actual IOL axis will be determined by retroillumination photography. IOL centration and tilt will be determined by anterior segment SS-OCT Casia II. IOLs will be implanted in 4 different axis 0 +/- 10 degrees, 45 +/- 10 degrees, 90 +/- 10 degrees, 135 +/- 10 degrees. IOL rotation, decentration and tilt then will be compared intraindividually.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
65
Implantation of an intraocular lens Zeiss 409 MP into the capsular bag using an injector, after removing of the human crystalline lens.
Medical University of Vienna Allgemeines Krankenhaus
Vienna, Austria
RECRUITINGChange of axial intraocular lens position
Change in axis position of an intraocular lens Zeiss 409 MP from end of surgery (baseline axis) to 1 hour, 1 week, 1 month and 4-7 months (end of study visit). The change in axis position will be evaluated with respect to the baseline measurement at the end of surgery. Differences in axis position will be described as rotation in degrees (0 to 360°)
Time frame: 7 months
Decentration
Decentration of the intraocular lens will be measured with the Casia 2 OCT. Decentration will be described as "Decentration in millimeter"
Time frame: 7 months
Tilt
Tilt of the intraocular lens will be measured with the Casia 2 OCT. Tilt will be described as "Tilt in degrees at a certain axis"
Time frame: 7 months
Anterior chamber depth
The anterior chamber depth (Axial position of the IOL) of the intraocular lens will be measured with the Casia 2 OCT after 1 month. The anterior chamber depth will be measured in millimeter
Time frame: 7 months
Best corrected visual acuity (BCVA)
BCVA will be measured at 1 week, 1 month and 4 to 7 months. The BCVA will be described as the minimum angle of resolution (logMar)
Time frame: 7 months
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.