WAIKOLOA, Hawaii — Optic nerve head microcirculation is reduced in glaucoma patients, a speaker said here.“Conventionally, OCT is used to measure structure with micron precision, and that has been very useful in terms of characterizing the structure of the optic nerve head, the nerve fiber layer and the ganglion cell complex,” David Huang, MD, PhD, said at Hawaiian Eye 2013. “We developed a technique where we decomposed the OCT image into several spectral bands and analyzed them separately and recombined them to enhance a signal of flow.”
Month: January 2013
Individualized glaucoma surgery offers effective results
WAIKOLOA, Hawaii — Glaucoma surgery should be individualized to each patient’s specific needs and form of glaucoma, a speaker said here.According to Thomas W. Samuelson, MD, OSN Glaucoma Section Editor, reducing glaucoma surgical complications is now easier for physicians due to the availability of the correct surgical tools.
Goniotomy, trabeculotomy produce most successful results in pediatric glaucoma
WAIKOLOA, Hawaii — Goniotomy and trabeculotomy are the most effective surgical methods for infantile glaucoma, a speaker said here.“The first thing that’s most important in these surgeries is visualization,” Ken K. Nischal, MD, FRCOphth, said at Hawaiian Eye 2013. “It’s really important to understand that the goniolens you use will affect how easy or how difficult the procedure becomes.”
Diagnostic vitrectomy for uveitis indicated to obtain tissue for biopsy
WAIKOLOA, Hawaii — The need for a biopsy specimen in a patient with uveitis is an indication for diagnostic vitrectomy, a somewhat technique-based but mostly disease-based procedure, according to a speaker.“Figuring out the disease and what you need to do to control it is an essential part of the surgery, because the disease, in many cases, is going to be ongoing even after the surgical procedure,” Janet L. Davis, MD, told colleagues at Retina 2013.
Trypan blue staining aids in performing proliferative vitreoretinopathy surgery
WAIKOLOA, Hawaii — Despite advances in vitreoretinal surgical techniques, proliferative vitreoretinopathy remains an obstacle to successful surgical repair. “It’s actually responsible for 75% of all primary surgical failures,” Sophie J. Bakri, MD, said at Retina 2013.
Small globe size, high concentration of VEGF in vitreous may be risk factor for early AMD
HYDERABAD, India — Small globe size, possibly in correlation with a thicker vitreous and a higher concentration of VEGF, may be a major risk factor for early age-related macular degeneration, according to a speaker here. “In the Beijing Eye Study, hyperopia, short interscleral spur distance and small optic disc size, besides older age, were found to be the main risk factors associated with early AMD. This points to a small globe size, and we may speculate that the vitreous plays a role,” Jost B. Jonas, MD, said at the joint (Read more...)
New eye banking model may bridge gap between donor cornea supply, demand
HYDERABAD, India — A three-tier eye banking model aims to optimize existing resources in India and make quality corneas available to all segments of the population, a speaker said here. The new model, already approved by the Indian Ministry of Health, may bridge the gap that currently exists between donor cornea need and availability.
Precut corneal tissue offers better safety, quality assurance
HYDERABAD, India — Corneal tissue precut by an eye bank provides better safety and quality assurance despite some disadvantages, according to a speaker here. “Precut tissue entails higher costs, needs swelling and a time interval of over 24 hours before transplantation. On the other hand, it is thoroughly examined and analyzed by slit lamp and specular microscopy. Only the best and safest lenticules are used in the OR,” Howard Cajucom-Uy, MD, said at the joint meeting of the Asia-Pacific Academy of Ophthalmology and All India Ophthalmological Society.
The Impact of an Electronic Health Record Transition on a Glaucoma Subspecialty Practice
Purpose:
To assess the impact of an electronic health record (EHR) on patient experience, physician behavior, and clinic workflow in a glaucoma subspecialty clinic.
Design:
Case-control (before/after) study.
Participants:
One hundred thirty-one a…
Spectral-Domain Optical Coherence Tomographic Assessment of Schlemm’s Canal in Chinese Subjects with Primary Open-angle Glaucoma
Purpose:
To evaluate in vivo features of Schlemm’s canal (SC) in patients with primary open-angle glaucoma (POAG) with spectral-domain optical coherence tomography (SD-OCT) and to investigate the relationship of SC size with intraocular pressure (IOP) and glaucoma severity.
Design:
Prospective, comparative study.
Participants:
Fifty Chinese patients with newly diagnosed POAG who had not undergone surgery and 50 normal Chinese subjects from a population-based, cross-sectional study in Shanghai.
Methods:
All participants underwent SD-OCT. The diameter and area of SC were examined in the temporal and nasal sections and measured with customized (Read more...)
The 10-Year Incidence and Risk Factors of Retinal Vein Occlusion: The Beijing Eye Study
Objective:
To assess the 10-year incidence of retinal vein occlusions (RVOs) and associated factors in adult Chinese subjects.
Design:
Population-based, longitudinal study.
Participants:
The Beijing Eye Study, which included 4439 subjects (age: 4…
Pavlov’s rats? Rodents trained to link rewards to visual cues
In experiments on rats outfitted with tiny goggles, scientists say they have learned that the brain’s initial vision processing center not only relays visual stimuli, but also can “learn” time intervals and create specifically timed expectations of fut…
Vernal Keratoconjunctivitis-like Disease in Adults – Corrected Proof
Purpose: To identify clinical, demographic, immunologic, and health-related quality-of-life data from a cohort of vernal keratoconjunctivitis (VKC) patients with the onset of the disease after puberty (VKC-like disease).Design: Retrospective, observati…
Comparison of Clinical Characteristics Between Korean and Western Normal-Tension Glaucoma Patients – Corrected Proof
Purpose: To detect potential differences in the phenotypes between Western normal-tension glaucoma (NTG) and Korean NTG.Design: A retrospective, cross-sectional study.Methods: One hundred eighty-four NTG eyes of 71 patients of the Jules Stein Eye Institute, University of California, Los Angeles, and 113 patients of the Seoul National University Hospital, Seoul, Korea, were studied after reviewing medical charts retrospectively. All eligible patients from both institutions who were evaluated between July 2007 and June 2008 were included. The groups were matched for stage of glaucoma severity based on the visual field mean deviation value. All patients underwent a complete ophthalmic examination, Humphrey perimetry, Heidelberg Retina (Read more...)
Vitreomacular Traction as a Consequence of Posterior Hyaloidal Contraction after Transpupillary Thermotherapy – Corrected Proof
Purpose: To describe the pathogenesis, clinical characteristics, management, and outcomes of patients in whom vitreomacular traction evolved pursuant to treatment of choroidal melanoma with transpupillary thermotherapy.Design: Retrospective, uncontroll…
High-Resolution Imaging of Retinal Nerve Fiber Bundles in Glaucoma Using Adaptive Optics Scanning Laser Ophthalmoscopy – Corrected Proof
Purpose: To detect pathologic changes in retinal nerve fiber bundles in glaucomatous eyes seen on images obtained by adaptive optics (AO) scanning laser ophthalmoscopy (AO SLO).Design: Prospective cross-sectional study.Methods: Twenty-eight eyes of 28 patients with open-angle glaucoma and 21 normal eyes of 21 volunteer subjects underwent a full ophthalmologic examination, visual field testing using a Humphrey Field Analyzer, fundus photography, red-free SLO imaging, spectral-domain optical coherence tomography, and imaging with an original prototype AO SLO system.Results: The AO SLO images showed many hyperreflective bundles suggesting nerve fiber bundles. In glaucomatous eyes, the nerve fiber bundles were narrower than in normal (Read more...)
Angiographic and Optical Coherence Tomography Characteristics of Recent Myopic Choroidal Neovascularization – Corrected Proof
Purpose: To analyze the contribution of fluorescein angiography (FA) and spectral-domain optical coherence tomography (SD OCT) to the diagnosis of recent choroidal neovascularization (CNV) associated with high myopia.Design: Retrospective, observational case series.Methods: Ninety eyes of 73 highly myopic patients (refractive error ≥−6 diopters) with CNV in 1 or both eyes were included. Epidemiologic features, refractive error, fundus examination, fluorescein angiography, and SD OCT findings at onset of CNV were analyzed.Results: Mean age at onset of CNV was 54.4 ± 14 years. CNV was bilateral in 17 of 73 cases. Mean refractive error was −13.9 ± 5.2 diopters. Myopic CNV was associated (Read more...)
Retroprosthetic Membrane and Risk of Sterile Keratolysis in Patients With Type I Boston Keratoprosthesis – Corrected Proof
Purpose: To evaluate whether retro-backplate retroprosthetic membrane is correlated with risk of melt in patients with a type I Boston Keratoprosthesis (KPro).Design: Retrospective, observational case series.Methods: Study of 50 eyes of 47 patients wit…
Use of Corneal Power-Specific Constants to Improve the Accuracy of the SRK/T Formula
Purpose:
To evaluate the effect of average corneal power (K) and axial length (AL) in a data-adjusted A-constant for improving the refractive outcome in the Sanders–Retzlaff–Kraff (SRK)/T formula.
Design:
Retrospective, consecutive, case series.
Participants:
A total of 637 patients (637 eyes) who underwent uncomplicated phacoemulsification with implantation of the Acrysof IQ (IQ; Alcon, Fort Worth, TX; 314 eyes) or Akreos AO (AO; Bausch & Lomb, Rochester, NY; 323 eyes) intraocular lens (IOL) by a single surgeon.
Methods:
The correlation among the K, AL, and predicted refractive error in the SRK/T (Read more...)
Being Overweight or Obese Is Associated with Lower Prevalence of Anemia among Colombian Women of Reproductive Age
By: kasiek