AI Article Synopsis
Article Abstract
Purpose: To analyze the image quality with a refractive and 2 hybrid refractive-diffractive multifocal intraocular lenses (IOLs) in vitro to determine the IOL modulation transfer function (MTF) following the EN-ISO international standard for distance and near vision and to study the IOLs' behavior with different pupil sizes.
Setting: Fundación Oftalmológica del Mediterráneo, Valencia, Spain.
Methods: This study evaluated 4 IOLs: the hybrid refractive-diffractive AcrySof ReSTOR SN60D3 (Alcon) and Tecnis ZM900 (AMO), the refractive ReZoom NXG (AMO), and the monofocal AcrySof SN60WF (Alcon). The MTF was calculated from the cross-line spread function recorded with the OPAL Vector System (Image Science Ltd.) using fast Fourier transform techniques. The artificial eye model simulated in vivo conditions of the anterior chamber and included an artificial cornea and physiological solution, in which the IOLs were positioned. The pupil sizes varied between 2.0 mm and 5.0 mm in steps of 0.5 mm.
Results: For distance vision and small pupils (2.0 to 3.5 mm), the refractive IOL provided better image quality than the 2 hybrid IOLs. When the pupil was larger, the distance vision was similar with all IOLs. The 2 hybrid IOLs gave better image quality than the refractive IOL for near vision with any pupil size. With the refractive IOL and pupils smaller than 3.5 mm, near focusing did not occur, resulting in poor image quality. Of the hybrid IOLs, the AcrySof ReSTOR SN60D3 provided better distance image quality and the Tecnis ZM900 provided better near image quality.
Conclusions: The refractive IOL gave better image quality than the hybrid IOLs at distance and with small pupils. With pupils larger than 3.5 mm, the quality was similar. Hybrid IOLs gave significantly better image quality for near vision with all pupil sizes. AcrySof ReSTOR SN60D3 IOLs give better distance vision than Tecnis ZM900 IOLs; the latter gave better near vision. The reference monofocal IOL provided better distance images than any multifocal IOL with all pupil sizes.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jcrs.2007.07.035 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Multi-band vs. conventional diffusion-weighted MRI of the abdomen in children and young adults.
Abdom Radiol (NY)
December 2024
Cincinnati Children's Hospital Medical Center, Cincinnati, USA.
Objectives: Implementation of diffusion-weighted imaging (DWI) for abdominal imaging in children has challenges due to motion artifacts exacerbated by long acquisition times. We aimed to compare acquisition time and image quality between conventional DWI and multi-band (MB) DWI of the liver in children and young adults.
Methods: Clinical MRI exams from May 2023 to January 2024 were reviewed, including four DWI sequences: respiratory-triggered (RTr, clinical standard), free-breathing (FB), MB-DWI with shift factor 1 (MBsf1), and MB-DWI with shift factor 2 (MBsf2).
Unveiling the potential of lung transplantation for situs inversus.
Expert Rev Respir Med
December 2024
Division of Thoracic Surgery, Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
Introduction: Situs inversus is a rare congenital condition where the organs in the chest and abdomen are reversed, thus complicating surgeries such as lung transplantation. Kartagener syndrome (KS), associated with situs inversus, includes chronic sinusitis and bronchiectasis, which can progress to end-stage lung disease requiring transplantation. This review discusses the unique surgical considerations, technical challenges, and outcomes of lung transplantation in patients with situs inversus, particularly KS.
View Article and Find Full Text PDFAGA Clinical Practice Update on Screening and Surveillance in Individuals at Increased Risk for Gastric Cancer in the United States: Expert Review.
Gastroenterology
December 2024
Division of Gastroenterology and Hepatology, Stanford University School of Medicine, Palo Alto, California.
Description: Gastric cancer (GC) is a leading cause of preventable cancer and mortality in certain US populations. The most impactful way to reduce GC mortality is via primary prevention, namely Helicobacter pylori eradication, and secondary prevention, namely endoscopic screening and surveillance of precancerous conditions, such as gastric intestinal metaplasia (GIM). An emerging body of evidence supports the possible impact of these strategies on GC incidence and mortality in identifiable high-risk populations in the United States.
View Article and Find Full Text PDFComparison of sedation using pentobarbital or chlorpromazine in pediatric non-invasive imaging procedures: A before and after study.: Comparison of sedation using pentobarbital or chlorpromazine in non-invasive imaging procedures.
Arch Pediatr
December 2024
CHRU de Brest, service de pédiatrie, Brest, France; Laboratoire de Traitement de l'Information Médicale INSERM U1101, Brest, France. Electronic address:
Background: Sedation is often required for pediatric medical imaging procedures to ensure compliance and image quality. Recommendations for pediatric sedation exist, but there are currently no guidelines for the choice of the sedative drug.
Objective: To compare the efficacy and adverse events of per os pentobarbital with intravenous chlorpromazine in children undergoing diagnostic imaging procedures.
A highly-sensitive fluorescent probe for the detection of copper ions and its applications in water quality monitoring, neural cell imaging and plant imaging.
Spectrochim Acta A Mol Biomol Spectrosc
December 2024
Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China. Electronic address:
High copper levels pose a risk to environmental and human health due to their toxicity and widespread industrial application, in which abnormal copper levels are associated with various diseases both in neurodegenerative diseases and plant growth. Thus, a turn-on fluorescent probe BBYD-Cu, based on donor-acceptor type structure, was designed and synthesized with easy preparations. BBYD-Cu can specifically recognized Cu by 2-picolinic ester group, then released the fluorophore to enhance the fluorescent signals.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!