Search Results
Results 301 - 350 of 1061
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Shevlin Mark - - 2011
Numerous studies of both clinical and large-scale population based samples have demonstrated that adverse childhood events are risk factors for subsequent psychosis. This study assessed the relationships between adverse childhood events and auditory and visual hallucinatory experiences. The study analysed data from the National Comorbidity Survey Replication conducted in the ...
Tan Thean Yen - - 2010
This study investigated the effect of different Mueller-Hinton agars and media age on tigecycline MICs, obtained by Etest. Variations in MIC values on different Mueller-Hinton were noted, which may result in changes in categoric susceptibility. The use of stored Mueller-Hinton media had minimal effect on MIC values.
Illing Sara - - 2010
To examine age-related changes in postural stability and sensory system functioning in men aged 30-80 years. Observational, cross-sectional study. One hundred six healthy men aged 30-80 years participated. Personal characteristics were recorded and outcome measures included: velocity of sway during bilateral stance on a firm and foam surface (eyes open ...
Kolesnikov Alexander V - - 2010
Even in healthy individuals, aging leads to deterioration in visual acuity, contrast sensitivity, visual field, and dark adaptation. Little is known about the neural mechanisms that drive the age-related changes of the retina and, more specifically, photoreceptors. According to one hypothesis, the age-related deterioration in rod function is due to ...
Lott Lori A - - 2010
PURPOSE: To determine which vision tests predict mortality within 10 years in a community-based elderly sample. METHODS: Nine hundred residents of Marin County, California 58 to 101 years of age (mean 75 years at baseline), underwent a battery of tests, including high contrast acuity, low contrast acuity, low contrast/low luminance ...
Redmond Tony - - 2010
Previously, an association between the area of complete spatial summation (Ricco's area) and age under scotopic conditions had been found. The authors sought to determine whether Ricco's area is similarly associated with age under photopic achromatic and selective S-cone conditions in peripheral vision and whether any association relates to a ...
Allen Peter M - - 2010
To investigate the impact of colored overlays on the accommodative response of individuals, with and without pattern-related visual stress (PRVS), a condition in which individuals manifest symptoms of perceptual distortion and discomfort when viewing a 3-cyc/deg square-wave grating. Under double-masked conditions, 11 individuals who reported PRVS selected an overlay with ...
Weber Joseph A - - 2010
Age-related vision loss is one of the most commonly cited disabling impairments of adult life. Stressors presented by vision loss can create barriers, threatening the well-being of the individual. This qualitative study of 30 older adults (65 to 95 years of age) investigated vision loss and coping strategies. All participants ...
Costello Matthew C - - 2010
Visual search studies have demonstrated that older adults can have preserved or even increased top-down control over distraction. However, the results are mixed as to the extent of this age-related preservation. The present experiment assesses group differences in younger and older adults during visual search, with a task featuring two ...
Lockhart Thurmon E TE Grado Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, VA, USA. - - 2010
Visual accommodation plays a critical role in one's visual perception and activities of daily living. Age-related accommodation loss poses an increased risk to older adults' safety and independence. Although extensive effort has been made towards understanding the effect of age on steady-state accommodation, dynamic aspects of accommodation is still unknown. ...
Nakamura Yuko - - 2010
To determine the prevalence and causes of low vision and blindness in an adult population on a rural southwest island of Japan. Population-based, cross-sectional study. All residents of Kumejima Island, Japan, 40 years of age and older. Of the 4632 residents 40 years of age and older, 3762 (response rate, ...
Bertone Armando - - 2010
The objective of the present study was to assess the development of luminance- and texture-defined static form perception in school-aged children. This was done using an adapted Landolt-C technique where C-optotypes were defined by either luminance or texture information, the latter necessitating extra-striate neural processing to be perceived. Typically developing ...
De Oliveira Filho Ciro Winckler - - 2010
The influence of a half-mile walk on the visual acuity of older people who engaged in physical activity was examined. 91 elderly people of both sexes (20 men, 71 women; M age = 69 yr., SD = 6) participated. All were assessed before and after the half-mile walking test for ...
Midena Edoardo - - 2010
To identify age-stratified normal light sensitivity values for microperimetry (fundus perimetry) and to evaluate the short-term repeatability of the MP1 microperimeter in normal volunteers. Multicenter, prospective, observational study. One hundred ninety subjects. One hundred ninety eyes of 190 healthy volunteers (age range, 20-75 years) underwent automatic, full-threshold microperimetry of the ...
Werner A - - 2010
We investigated the effect of ageing on the neural gain control in the short-wavelength opponent channel. In order to tackle specifically postreceptoral changes, we determined the effect of ageing on transient tritanopia, a paradoxical and transient reduction of short-wavelength sensitivity after the presentation of a long-wavelength adapting light. The results ...
Dhital A - - 2010
Falls are an important health issue. They cause significant morbidity and mortality particularly in older people, and also have marked psychological effects on the individual. The literature focuses particularly on older adults, an age group in which both visual impairment and falls are more prevalent, as is the associated morbidity. ...
Schneiders Anthony G - - 2010
To determine whether elite motorsport athletes demonstrate superior levels of Visual Acuity than age and sex-matched controls. A cross-sectional observational study. A University vision and balance laboratory. Young male motorsport athletes from the New Zealand Elite Motorsport Academy and healthy age and sex-matched controls. Vision performance tests comprising; Static Visual ...
Kalinina Ayuso Viera - - 2010
To analyze visual outcome in uveitis associated with juvenile idiopathic arthritis (JIA) according to age of onset of uveitis, gender, and initial manifestation of JIA. Retrospective nonrandomized interventional case series. Visual outcome of 117 affected eyes (65 patients) with JIA-associated uveitis was noted at onset of uveitis and after 1, ...
Watanuki Shoichi - - 2010
OBJECTIVE: Positron emission tomography (PET) scanners require periodic monitoring in order to maintain scanner performance. The aim of the present study was to examine the deterioration of PET scanner performance caused by aging. METHODS: We retrospectively examined PET scanner performance alterations in terms of sensitivity, spatial resolution, false coincidences due ...
Papadopoulos Triantafillos - - 2010
To investigate the colour stability of four indirect composite restorative materials after accelerated aging. Four indirect composites (Gradia, Signum+, HFO and Adoro) were used. For each material, six specimens were prepared and subjected to accelerated aging (Suntest CPS+, Atlas, Chicago, IL, USA) according to ISO 7491. A Dr. Lange Microcolor ...
Ofori Edward E Motor Control Research Laboratory, Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, 241 Freer Hall, 906 S. Goodwin Ave, Urbana, IL 61801, USA. - - 2010
It is well established that older adults are more variable in their force output and that this age-related decrement is mediated by visuomotor processing. The purpose of this investigation was to examine whether the type of visual display impacts age-related differences in the control of force output. In order to ...
Ekstr?m Anne-Berit - - 2010
OBJECTIVE: To investigate visual function in a group of individuals with congenital and childhood myotonic dystrophy type 1 (DM1), to correlate the results to the size of the cytosine-thymine-guanine (CTG) repeat expansion and the onset form, and to compare the results with those of a control group. DESIGN: Cross-sectional study ...
Harth Sebastian - - 2010
Since Broca's time (1824-1880), ossification of the neurocranial sutures has been used as a characteristic of age. Current approaches include the visual macroscopic examination of ecto and endocranial sutures. The evaluation of the cross-section of sutures usually necessitates the destruction of the neurocranium. In a nondestructive alternative approach that was ...
Sainz-Gómez Carmen - - 2010
PURPOSE: To estimate the prevalence and causes of bilateral blindness and visual impairment in an urban institutionalized population aged 65 years and older. METHODS: A total of 392 nursing home residents completed a standardized eye examination, including measurement of visual acuity (VA), intraocular pressure, lens opacity grading, indirect ophthalmoscopy, and ...
Keay Lisa - - 2010
BACKGROUND: Ready-made spectacles (RMS) have advantages; however, visual performance and satisfaction has not been evaluated. METHODS: A 1-month, double-masked, randomized clinical trial comparing planned continued use and visual performance of RMS to Custom Spectacles (CS) in adults aged 18-45 years with > or =1 diopter (D) of uncorrected refractive error ...
Pilling M L - - 2010
INTRODUCTION: Forensic experts are frequently asked to comment on the age of injuries and interpretation may have significant medico-legal consequences. The purpose of this study is to determine the accuracy with which forensic experts can visually age a bruise from photographs produced under standard conditions. METHODS: Bruises were produced on ...
Yamada Masakazu - - 2010
PURPOSE: To present a comprehensive estimate of the total number of people with visual impairment in the adult Japanese population by age, gender, severity and cause, and to estimate future prevalence based on population projections and expected demographic changes. METHODS: Definitions of visual impairment used in this study were based ...
Cruciani F - - 2010
Purpose. Low vision and blindness are signifi cantly growing in both industrialized and developing countries. In Italy there are few epidemiological studies that provide data on this phenomenon. In this paper we report the main causes of blindness and the characteristics of the subjects who obtained a disability certifi cation ...
Honaker Julie A - - 2010
Impairments of the vestibular-ocular reflex (VOR) lead to a decline in visual acuity during head movements. Dynamic visual acuity (DVA) testing is a sensitive assessment tool for detecting VOR impairments. DVA evaluates accuracy of visual acuity during fixed velocity head movements. In contrast, the Gaze Stabilization test (GST) is a ...
Kwok Jasmine C - - 2010
Kwok JC, Hui-Chan CW, Tsang WW. Effects of aging and Tai Chi on finger-pointing toward stationary and moving visual targets. OBJECTIVE: To examine the aging effect on speed and accuracy in finger pointing toward stationary and moving visual targets between young and older healthy subjects and whether or not Tai ...
Dusek Wolfgang - - 2010
To describe and compare visual function measures of two groups of school age children (6-14 years of age) attending a specialist eyecare practice in Austria; one group referred to the practice from educational assessment centres diagnosed with reading and writing difficulties and the other, a clinical age-matched control group. Retrospective ...
Eballe André Omgbwa - - 2010
We performed a retrospective, analytical study in February 2010 on all retinitis pigmentosa cases seen during ophthalmologic consultation at the Gyneco-Obstetrics and Pediatric Hospital of Yaounde between March 2002 and December 2009 (82 months). The aim of this research was to determine the significance of blindness and visual impairment associated ...
Li Roger W - - 2010
Much previous work on how normal aging affects visual enumeration has been focused on the response time required to enumerate, with unlimited stimulus duration. There is a fundamental question, not yet addressed, of how many visual items the aging visual system can enumerate in a "single glance", without the confounding ...
Kim Dae Shik DS Western Michigan University, Department of Blindness and Low Vision Studies, Kalamazoo, MI 49002-5218, USA. - - 2010
This study examined how user characteristics affect drop-off detection with the long cane. A mixed-measures design with block randomization was used for the study, in which 32 visually impaired adults attempted to detect the drop-offs using different cane techniques. Younger cane users detected drop-offs significantly more reliably (mean +/- standard ...
Elliott Sarah L SL Department of Ophthalmology & Vision Science, University of California-Davis, 4860 Y Street, Sacramento, CA 95817, USA. - - 2010
Neural contributions to the age-related reduction in spatial vision are incontrovertible. Whether there are differential age-related changes in the magnocellular (M) and parvocellular (P) pathways across the life span has not been tested extensively. We studied psychophysically the contrast gain signature of the M and P pathways for 13 younger ...
Laviers Heidi R - - 2010
To assess presbyopic spectacle coverage, willingness to pay, and the impact of correcting uncorrected presbyopia in individuals 40 years of age and older in Zanzibar and whether assessment of presbyopia can be incorporated into Rapid Assessment of Blindness (RAAB) surveys. A cross-sectional, population-based survey of presbyopia was incorporated into a ...
Seland Johan H - - 2011
To determine the prevalence of visual impairment (VI) in populations 65 year or older from six European countries and describe the association with vision-related quality of life. VI was defined according to WHO as best corrected visual acuity <6/18/log MAR >0,48 (World Health Organization (1992): International Statistical Classification of Diseases ...
Babizhayev Mark A - - 2009
The antioxidant activity of L-carnosine (beta-alanyl-L-histidine, bioactivated in ocular tissues) versus N-acetylcarnosine (N-acetyl-beta-alanyl-L-histidine, ocular-targeted small dipeptide molecules) was studied in aqueous solution and in a lipid environment, employing liposomes as a model of lipid membranes. Reactive oxygen species (ROS) were generated by an iron/ascorbate promoter system for induction of lipid ...
Chang Robert T - - 2009
PURPOSE: To evaluate the sensitivity and specificity of measurements of retinal nerve fiber layer (RNFL) thickness in early to moderate glaucoma using Stratus time-domain and Cirrus spectral-domain optical coherence tomography (OCT; Carl Zeiss Meditec, Dublin, CA). DESIGN: Evaluation of diagnostic test or technology. PARTICIPANTS: Fifty-four glaucoma subjects with early to ...
Pedalini Maria Elisabete Bovino - - 2009
Conclusions. Elderly subjects without vestibular dysfunction had an overall worse performance as compared with the group of normal adults, confirming that age has a negative impact on balance. The group of elderly subjects with vestibular dysfunction had more important balance alterations than those without, confirming that vestibular dysfunction has a ...
Mutlu Fatih Mehmet - - 2009
PURPOSE: To investigate the effect of monofocal spheric acrylic intraocular lenses (IOL) on the visual field (VF) parameters. MATERIALS AND METHODS: Thirty-six healthy pseudophakics (group 1) and 42 age-matched healthy volunteers (group 2) who had visual acuity of > or = 9/10 Snellen lines underwent central 24-2 threshold VF testing ...
Heuer Herbert - - 2009
Age-related changes of adjustment to visuo-motor transformations were studied for a complex transformation modelled after those encountered in laparoscopic surgery. Movement times of aimed movements were initially almost identical for the two age groups and diverged in the course of practice. In test phases without visual feedback, no age-related variation ...
Marmamula Srinivas - - 2009
PURPOSE: To investigate the prevalence of uncorrected refractive errors, presbyopia and spectacle coverage in subjects aged 15-50 years using rapid assessment methodology in the Mahabubnagar district of Andhra Pradesh, India. METHODS: A population-based cross sectional study was conducted using cluster random sampling to enumerate 3,300 subjects from 55 clusters. Unaided, ...
Civelekler Mustafa - - 2009
To investigate the value of temporal retinal nerve fiber layer (RNFL(temporal)) thickness in the prediction of malingering. This prospective, cross-sectional study was conducted on 33 military conscripts with optic disc temporal pallor (ODTP) and 33 age-and sex-matched healthy controls. Initial visual acuity (VA(i)) and visual acuity after simulation examination techniques ...
Sherchan A - - 2010
AIM: To determine the prevalence of blindness, visual impairment and the cataract surgical coverage for people aged 50 years and older in the Lumbini Zone and the Chitwan District (Narayani Zone) of Nepal. METHODS: A population-based cross-sectional study in 2006 selected subjects aged 50 years and older through a random ...
Mahmood Omar - - 2009
Previous research has demonstrated age-related decline in spatial navigation skills. However, spatial navigation is a complex ability that requires the integration of many component processes that may show differential susceptibility to aging. In particular, successful navigation depends on the accurate computation of distance and direction from self-generated movements through the ...
Kang Nam-Yeo - - 2009
The purpose of this study is to estimate normative values of maximum versions in healthy Koreans and investigate age-associated changes in eye movement, using lateral and vertical version light-reflex (LVR) test. Two hundred forty normal healthy subjects whose corrected visual acuity was better than 20/50 in both eyes, from 4 ...
Hallemans Ann A Research Group of Functional Morphology, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium. - - 2009
Following the laws of planar covariation, intersegmental coordination is defined with respect to the vertical and heading direction. This vertical reference can be estimated using multisensory information, amongst others visual cues play a role. In the past it was already shown that visual deprivation and/or perturbation of visual information largely ...
Wang Yi-Zhong YZ Department of Ophthalmology, Retina Foundation of the Southwest, University of Texas Southwestern Medical Center, Dallas, Texas 75231, USA. - - 2009
Global visual integration is fundamental to shape and face recognition. Although the maturation of local visual function, such as resolution acuity, has been well documented, less is known about the changes in global visual function during development and with aging. Two hundred thirty-six normal subjects, ranging in age from 0.25- ...
Riis Jenna L JL Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, - - 2009
This study investigated age-related changes in the early processing of novel visual stimuli using ERPs. Well-matched old (n=30), middle-aged (n=30), and young (n=32) subjects were presented standard, target/rare, and perceptually novel visual stimuli under Attend and Ignore conditions. Our results suggest that the anterior P2 component indexes the motivational salience ...
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