Risk Factors For Yag Capsulotomy Following Ic8 Implantation
Published 2025 - 43rd Congress of the ESCRS
Reference: PO384 | Type: Free paper | DOI: 10.82333/b53d-9f34
Authors: Wenjie Wu* 1 , Yulong Huang 2 , Chishan Kang 2
1Department of Ophthalmology,Fuzhou University Affiliated Provincial Hospital,Fuzhou,China;Shengli Clinical Medical College,Fujian Medical University,Fuzhou,China, 2Shengli Clinical Medical College,Fujian Medical University,Fuzhou,China
Purpose
The IC 8, is an extended depth of focus monofocal lens, that uses pinhole optics to provide intermediate and near vision. Due to the mask on the IOL the patient will visualize the image through the central 1.3mm aperture. As with all cataract surgery, over time the patient will be prone to the development of posterior capsule opacification. This may affect the quality of their vision and the performance. The aim of this study was to assess the risk factors affecting to decision to perform yag capsulotomy following IC 8 implantation.
Setting
Singapore Nationnal Eye Centre (SNEC) - Single Centre Study
Methods
This retrospective, non-interventional, single- center clinical study. Eighty patients with aberrated corneas had IC-8 IOL (Bausch & Lomb, Inc) implantation. An aberrated cornea was defined as from natural causes: keratoconus high coma, corneal scar, or iatrogenic causes: keratorefractive procedure. Uncorrected and corrected visual acuities were measured at distance (600 cm) (UDVA and CDVA), intermediate (66.7 cm) (UIVA and CIVA), and near (40 cm) (UNVA and CIVA). Defocus curve was tested monocularly and binocularly. Contrast sensitivity (CS) was measured under photopic and mesopic conditions with and without glare.
Results
In IC-8 eyes, the mean ± standard deviation UDVA, UIVA, and UNVA was 0.24 ± 0.18, 0.19 ± 0.18, and 0.14 ± 0.14 logMAR, respectively. Binocular mean UDVA, UIVA, and UNVA was 0.07 ± 0.10, 0.07 ± 0.10, and 0.13 ± 0.12 logMAR, respectively. Defocus curve testing yielded a depth of focus of 1.50 D monocularly and 2.00 D binocularly at a 0.2 logMAR threshold. 45% of patients unerwent Yag capsulotomy. All patients who underwent capsulotomy, had a reduction in their intermediate and near vision, with minimal effect on distance vision. There were 2 groups noted. Early yag typically within 6 months of implantation - related to post capsule folds, late yag related to capsule opacification.
Conclusions
Posterior capsule issues can affect visual quality following IC8 implantation. Typically distance and intermediate vision is affected. Early capsulotomy is indiciated when capsule folds tranversing through the central aperture. Late capsulotomy is indicated with frank opacification. Visual recovery returns to pre capsule pathology following laser.