Evaluation of Two Different Intraocular Lens Models After Lens Implantation Using the Yamane Technique

During uncomplicated cataract surgery, an intraocular lens (IOL) is implanted into the patient's capsular bag. If increased instability or rupture of this capsular bag occurs due to aggravated intraoperative conditions or IOL dislocation, several options are available to the surgeon to correct the aphakia, all characterized by their respective advantages and disadvantages, but with no clear superiority of any one method.

The popular Yamane technique, or "flanged IOL fixation", uses a double-needle technique that seamlessly fixes the haptics intrascleral by creating a scleral tunnel using two 30-gauge needles.

Examples of lenses used for this purpose are the TECNIS ZA9003 (Johnson&Johnson, USA) and the Kowa PU6AS (Kowa, Japan). Another approach is the Carlevale FIL-SSF IOL (Soleko, Italy), which was developed specifically for use in aphakia with lack of capsular stability.

All types of implantation are not immune to aberrations, tilting or even dislocation. Many factors influence the final outcome of IOL implantation, be it the optimal choice of intraocular lens power, the surgeon's experience regarding fixation in more challenging eyes, or individual anatomical conditions. As part of quality assurance, an evaluation of monthly and six-monthly data will now be performed. The aim of this study is the evaluation of the postoperative tilt of the Kowa PU6AS in Yamane technique, as well as the evaluation of the corrected and uncorrected visual acuity and the anterior chamber depth within the clinical quality management.