Publications by authors named "Claudette Abela-Formanek"
Purpose: To evaluate the refractive prediction error of common intraocular lens (IOL) power calculation formulas in patients who underwent intrascleral IOL fixation using the four-flanged technique.
Methods: This prospective, longitudinal, single-site, single-surgeon study's setting was the Department for Ophthalmology and Optometry, Medical University of Vienna, Austria. Patients who received IOL implantation via the four-flanged technique were followed up to 3 months after the operation.
Assessing Postoperative Toric Intraocular Lens Rotation: A Comparative Analysis.
J Cataract Refract Surg
November 2024
Purpose: To investigate the accuracy of three distinct postoperative toric intraocular lens (TIOL) rotational stability measurement methods.
Setting: Department of Ophthalmology and Optometry, Medical University of Vienna, Austria.
Design: Single-center, prospective, interventional clinical trial.
Purpose: To compare intraindividually the incidence and intensity of posterior capsule opacification (PCO) and Nd:YAG capsulotomy rates between 2 similar open-loop single-piece hydrophobic acrylic intraocular lenses (IOLs) differing slightly in their particular material, optic surface, and sharp posterior edge design over a period of 3 years.
Setting: Department of Ophthalmology, Medical University Vienna, Vienna, Austria.
Design: Randomized, prospective, patient-masked and examiner-masked clinical trial with intraindividual comparison.
Purpose: To assess rotational stability and refractive outcomes of a new toric hydrophobic acrylic intraocular lens (IOL).
Design: Single-center, prospective, interventional clinical trial.
Methods: A total of 130 eyes of 82 patients with age-related cataract and total corneal astigmatism of greater than 1.
Purpose: To compare intraindividual monocular visual performance of a monofocal extended depth-of-focus (EDOF) and a trifocal EDOF intraocular lens (IOL) following bilateral cataract surgery.
Design: Single-center, prospective, fellow-eye comparison clinical trial.
Methods: All patients received uneventful bilateral cataract surgery with implantation of the monofocal EDOF Isopure IOL in the dominant eye and the trifocal EDOF FineVision Triumf IOL in the nondominant eye.
Background: To evaluate the frequency and anterior segment optical coherence tomography parameters of patients with scleral fixated intraocular lenses (IOL) and reverse pupillary block (RPB).
Methods: Retrospective analysis at a tertiary care centre (Department for Ophthalmology and Optometry, Medical University of Vienna, Austria). We researched our records for patients who underwent scleral fixated IOL implantation from January 2018 till February 2023.
Purpose: To evaluate the surgically induced astigmatism over a 6-month follow-up period in patients who underwent scleral IOL fixation using an acrylic single-piece IOL with special haptics designed for sutureless scleral fixation.
Methods: We conducted a prospective longitudinal study at a single site with a single surgeon. We included patients who received transscleral IOL implantation following the Carlevale technique and were followed up post-operatively for 24 weeks.
Purpose: To compare intraindividual differences in visual performance of a monofocal and enhanced monofocal intraocular lens (IOL) of the same platform.
Design: Prospective, interventional, fellow-eye comparison clinical study.
Methods: In total, 55 patients (110 eyes) with bilateral age-related cataract were enrolled.
Purpose: To evaluate the influence of a capsular tension ring (CTR) on rotational stability, decentration, tilt, and axial stability of an 11.0-mm plate haptic intraocular lens (IOL).
Design: Intraindividual, randomized, double-masked, controlled clinical trial.
Objectives: To assess intra-individually visual acuity (VA) and subjective outcome after mix-and-match implantation of a monofocal EDOF IOL and a diffractive trifocal IOL.
Methods: The monofocal EDOF Isopure IOL was implanted in the dominant eye and the trifocal FineVision HP IOL in the non-dominant eye. Postoperative evaluation included VA at various distances, contrast acuity, monocular defocus curves, decentration and tilt, wavefront aberrometry, VF-7 questionnaire and a halo and glare simulator.
Refractive outcome and lens power calculation after intrascleral intraocular lens fixation: a comparison of three-piece and one-piece intrascleral fixation technique.
Eye Vis (Lond)
June 2023
Purpose: To evaluate the refractive prediction error of common intraocular lens (IOL) power calculation formulae in patients who underwent intrascleral IOL fixation using two different techniques.
Methods: This is a prospective, randomized, longitudinal, single-site, single-surgeon study. Patients who underwent intrascleral IOL implantation using the Yamane or the Carlevale technique were followed up for a period of six months postoperatively.
Purpose: To evaluate neuroretinal integrity in different subtypes of optical coherence tomography (OCT)-graded partial-thickness macular holes.
Methods: Fovea-centred SD-OCT images (Cirrus, Carl Zeiss Meditec AG; Spectralis, Heidelberg Engineering GmbH) and visual acuity (VA) acquired at every visit were analysed by two retina specialists retrospectively in 71 eyes of 65 patients. Partial-thickness macular holes were classified as lamellar macular hole (LMH), epiretinal membrane foveoschisis (ERMF) or macular pseudohole (MPH).
Purpose: To assess the reliability and reproducibility of a new semiautomated evaluation method, "Rotix," for intraocular lens (IOL) rotation and to define a standardized evaluation method for future toric IOL studies.
Design: Reliability and reproducibility study.
Methods: Setting: Department of Ophthalmology, Medical University of Vienna.
Purpose: To assess and compare safety and effectiveness between 23-gauge and 25-gauge vitrectomy systems for the treatment of common vitreoretinal diseases in non-vitrectomized eyes.
Methods: Retrospective evaluation of patients who underwent pars plana vitrectomy from April 2018 to December 2019 at the Department of Ophthalmology and Optometry at the Medical University of Vienna (MUV) for the following indications: macular epiretinal membrane, macular hole, macular lamellar hole, vitreous hemorrhage, vitreous opacities, vitreomacular traction syndrome and macular edema.
Results: 201 eyes of 195 patients that underwent 23-gauge (n = 105 eyes) or 25-gauge (n = 96 eyes) vitrectomy were included in this study.
Background: To prospectively investigate retinal vascular changes in patients undergoing epiretinal membrane (ERM) and internal limiting membrane (ILM) peeling using swept source optical coherence tomography angiography (SSOCTA).
Methods: Consecutive patients were grouped based on ERM severity and followed using SSOCTA up to month 3 after surgical intervention. Superficial and deep foveal avascular zone (s/dFAZ) as well as foveal and parafoveal vessel density (VD) were correlated with ERM severity and visual acuity.
Aims: To provide clinical guidance on the use of intraocular lens (IOL) power calculation formulas according to the biometric parameters.
Methods: 611 eyes that underwent cataract surgery were retrospectively analysed in subgroups according to the axial length (AL) and corneal power (K). The predicted residual refractive error was calculated and compared to evaluate the accuracy of the following formulas: Haigis, Hoffer Q, Holladay 1 and SRK/T.
Purpose: To assess the influence of artificial tears of different viscosity on K-readings prior to cataract surgery.
Design: Prospective randomized crossover, before-and-after clinical study.
Methods: Setting: Department of Ophthalmology, Medical University of Vienna.
Purpose: To evaluate the change in the fovea's postoperative location after successful pars plana vitrectomy with combined epiretinal and internal limiting membrane peeling in patients with idiopathic epiretinal membranes (iERMs).
Methods: In this prospective study 32 eyes of 32 patients with iERMs were followed from baseline before until 3 months after surgery. Study measures included 4-m Early Treatment Diabetic Retinopathy Study best-corrected visual acuity, enhanced-depth imaging-optical coherence tomography, and intraoperative fundus photographs.
Purpose: To evaluate the long-term uveal and capsular biocompatibility of 5 intraocular lenses (IOLs) in eyes with uveitic cataract.
Setting: Department of Ophthalmology, Medical University of Vienna, Vienna, Austria.
Design: Comparative case series.
Background: To determine the outcome following injections of triamcinolone acetate (IVTA) in the treatment of persistent cystoid macular oedema (CMO) in quiescent, non-infectious uveitis.
Methods: Retrospective analysis of patients with inactive uveitis requiring/not requiring immunosuppressive therapy who received IVTA because of chronic CMO refractory to previous systemic steroids. Number of IVTA (re-)treatments, distance visual acuity, near visual acuity, mean foveal thickness, intraocular pressure, duration of CMO, type of uveitis and systemic therapy were assessed previous to and 1, 4, 12 weeks following each IVTA treatment.
Uveal and capsular biocompatibility after implantation of sharp-edged hydrophilic acrylic, hydrophobic acrylic, and silicone intraocular lenses in eyes with pseudoexfoliation syndrome.
J Cataract Refract Surg
August 2007
Purpose: To evaluate the uveal and capsular biocompatibility of 3 types of sharp-edged foldable intraocular lenses (IOLs) in eyes with pseudoexfoliation syndrome (PEX).
Setting: Department of Ophthalmology, Medical University of Vienna, Vienna, Austria.
Methods: Eighty-five eyes with PEX had implantation of 1 of the following sharp-edged 3-piece IOLs: hydrophilic acrylic (Injectacryl F3000, OphthalMed), hydrophobic acrylic (AcrySof MA60MB, Alcon), or silicone (CeeOn 911, AMO).
Purpose: To compare the surgical trauma after microincision phacoemulsification and small-incision coaxial phacoemulsification after implantation of conventional, foldable, hydrophobic acrylic intraocular lenses (IOLs).
Setting: Department of Ophthalmology, Medical University of Vienna, Vienna, Austria.
Methods: A prospective investigator-masked case series comprised patients with bilateral cataract who had cataract surgery on the same day.
Purpose: To compare the ongrowth of lens epithelial cells (LECs) on the anterior surface of 6 different hydrophilic intraocular lenses (IOLs).
Setting: Medical University of Vienna, Department of Ophthalmology and Optometry, Vienna, Austria.
Methods: Six models of hydrophilic IOLs were compared in this prospective study: Visionflex A-100 (Distra Softcryl), Rayner Centerflex 570H (Rayner), Collamer CC4204BF-IOL (Staar), Injectacryl F 3000 (Distra), Hydroview H60M (Bausch & Lomb), and MemoryLens (ORC).
Purpose: To analyze uveal and capsular biocompatibility 1 year following implantation of a sharp-edged, hydrophilic, collagen-containing posterior chamber intraocular lens (IOL).
Setting: Department of Ophthalmology, University of Vienna Medical School, Vienna, Austria.
Method: In a prospective study, a Collamer CC4204BF IOL was implanted in 30 eyes of patients with senile cataract.