Search Results
Results 351 - 400 of 1012
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Mojon-Azzi S M - - 2008
BACKGROUND: Because of the growing life expectancy in developed countries and the exponential increase in vision loss with increasing age, a growing number of elderly persons will eventually suffer from visual impairment and blindness. This paper describes the association between self-reported vision and well-being in individuals aged 50 years and ...
Broman Aimee Teo - - 2008
To estimate the rate of visual field progression in open-angle glaucoma (OAG) subjects, by using data from population-based cross-sectional studies. Subjects with OAG were identified in nine surveys of randomly sampled populations using standard criteria for glaucomatous optic neuropathy. Subjects were of European, African, Chinese, and Hispanic ethnicity. The measure ...
Hermann Agnes - - 2008
PURPOSE: To determine age-dependent normative differential threshold values for the Octopus 101 instrument and to create a smooth mathematical model characterizing the age-dependency and asymmetry of the hill of vision. METHODS: Static automated perimetry within the central 30 degrees visual field (VF) was conducted with the Octopus 101 (background luminance ...
Esteban J J Navarro - - 2008
PURPOSE: To estimate the prevalence of visual impairment (VI) in a population sample of older adults of the province of Cuenca, Spain and to evaluate the impact of VI on health-related quality of life (HRQOL) in this population group. METHODS: Cross-sectional observational study of the cohort of all persons over ...
Krasny Jan - - 2007
An alteration of contrast sensitivity (CS) might be connected with structural and functional changes in foveolar and perifoveolar regions caused by different etiologies. We tested the hypothesis, that disturbances of CS can precede the typical changes in macular area in nonproliferative diabetic retinopathy (NPDR) in young patients with diabetes type ...
Descalzo A M - - 2008
Buffalo meat production is increasing in Argentina. Information on meat quality and nutritional value will be useful in marketing. This work describes the oxidative stability of the Longissimus dorsi (LD) in relation to consumption of antioxidant vitamins, fatty acid composition and color deterioration during ageing. Vitamins levels found in fresh ...
Harwerth Ronald S - - 2008
PURPOSE: The effects of aging on retinal nerve fiber layer (RNFL) thickness should reflect the age-related losses in retinal ganglion cells (RGCs), but published data suggest that the relative rate of thinning of RNFL thickness with age is less than predicted by age-related losses of RGCs. Therefore, the present study ...
Heuer Herbert - - 2008
We studied adaptation to a direction-dependent visuo-motor rotation in adults of early and late working age. For hand movements to the right, visual motion of the cursor on a monitor was rotated clockwise, for forward movements rotation of the cursor motion was zero, and for directions in-between rotation was intermediate. ...
Cedrone Claudio - - 2007
PURPOSE: To investigate changes in the prevalence of visual impairment in an Italian population from 1988 to 2000. METHODS: Standardized ophthalmologic examinations were administered to citizens of Ponza, Italy aged 40-87 years in 1988 and 2000. Visual Acuity (VA) was measured using a standard logarithmic chart. Visual fields (VF) were ...
Hohberger Bettina - - 2007
BACKGROUND: The purpose of this study was to develop age-related curves for contrast sensitivity (CS) in normal subjects under day and night conditions with and without glare. METHODS: Sixty-one healthy eyes from 61 subjects were measured with the OPTEC(R) 6500 P under day and night conditions (luminance levels: 85 cd/m(2) ...
Wolf-Schnurrbusch Ute E K - - 2007
PURPOSE: Many epidemiologic studies suggest a number of risk factors that may be associated with progression of age-related maculopathy (ARM). In this study, the authors investigate ethnic differences in macular pigment density (MPD) and macular pigment (MP) distribution. METHODS: Inclusion criteria were healthy subjects, aged 35 to 49 years, visual ...
Oetjen Sophie - - 2007
OBJECTIVE: The present study examined the visual discrimination speed and accuracy while using an LCD and a CRT display. BACKGROUND: LCDs have ergonomic advantages, but their main disadvantage is that they provide inconsistent photometric measures depending on the viewing angle (anisotropy). METHOD: Independent variables were screen type (LCD and CRT), ...
Leat Susan J - - 2007
PURPOSE: There are isolated reports that accommodative response is reduced in some populations with low vision. The purpose of this study was to measure accommodative response in a wider range of pre-presbyopes with visual impairment and to examine what factors may affect accommodation among the low vision population. METHODS: Accommodative ...
Stewart-Knox Barbara J - - 2008
Taste acuity declines with age and may be dependent upon Zn status. The aim of the present double-blind, randomised controlled intervention trial has been to determine taste acuity in response to Zn supplementation (placebo, or 15 or 30 mg Zn/d). Healthy older European adults aged 70-87 years were recruited within ...
Mei Ming - - 2007
PURPOSE: To compare suprathreshold contrast perception among three groups of participants with maculopathy (atrophic age-related macular degeneration [ARMD], exudative ARMD, and juvenile macular dystrophy [JMD]) and to compare suprathreshold contrast matching between controls and subjects with maculopathy. METHODS: Three groups of subjects with macular disorders (13 atrophic ARMD, 14 exudative ...
Rebok George W - - 2007
INTRODUCTION: Vision problems have become an increasingly important health and safety concern for pilots due to the aging of the pilot population. This paper examines the incidence of age-related vision problems in a birth cohort of commuter air carrier and air taxi pilots. METHODS: A cohort of 3019 male pilots ...
Wild John M - - 2007
PURPOSE: The risk factors for visual field loss attributable to vigabatrin (VAVFL) are equivocal. This multinational, prospective, observational study aimed to clarify the principal/major factors for VAVFL. METHODS: Interim analysis of three groups with refractory partial epilepsy, stratified by age (8-12 years; >12 years) and exposure to vigabatrin (VGB). Group ...
Del Viva Maria Michela - - 2007
PURPOSE: To investigate the effect of ageing on contour integration in subjects whose ages ranged from 20 to 99 years. METHODS: Detection thresholds were measured for a closed chain of Gabor patches oriented tangentially to a circle (target) embedded in a background of randomly positioned and oriented Gabors (noise). Detection ...
Kurita, Hiroshi
This article reports field observation of Paleogene clastic successions in two areas in north-western Kyushu and provides a preliminary interpretation of their sedimentary environments on the basis of lithological facies. In the sections from Sakito-Oshima Island, the Ichigoshima, Sakito, Maze and Tokuman Formations were logged. They are, except their basal ...
Stetzer A J - - 2007
The objective of this study was to evaluate the effects of enhancement and aging on quality characteristics of the gluteus medius (round), rectus femoris (round), teres major (chuck), infraspinatus (chuck), and psoas major (loin). Muscles were enhanced, vacuum packaged, and aged for 7 or 14 d. Aging affected enhanced compared ...
Khan R I - - 2007
All children under the age of 16 who fulfilled the criteria of blindness and low vision as defined by WHO were included in the study. These children were recruited from 1990 to 2004 from all the Ophthalmology Departments of Ireland, National Council of Blind and Visually impaired. Data was collected ...
Parikh Rajul S - - 2007
PURPOSE: To determine the normal age-related loss of retinal nerve fiber layer thickness (RNFLT) as measured on Stratus optical coherence tomography (OCT 3; Carl Zeiss Meditec, Dublin, CA) in an Asian Indian population. DESIGN: Prospective, cross-sectional, observational study. PARTICIPANTS: One hundred eighty-seven eyes of 187 normal subjects (age range, 5-75 ...
Subramaniam Sandhya V - - 2007
PURPOSE: The primary objective of this study is to determine whether there are significant differences in visual and refractive outcomes between gas permeable (GP) and non-GP wearers following a 1-month period of overnight orthokeratology (OK). METHODS: The study included 14 subjects between the ages of 18 and 42 years. Group ...
Xiong Youling L - - 2007
Two experiments were conducted to investigate the influence of age of mature cows (2-4yr, 6-8yr, and 10-12yr cows; n=6 in each) on beef quality. In Experiment 1, Longissimus dorsi (LD) steaks were stored at 3°C for 0-10d. Steaks from more mature cows had an increased (P<0.05) Warner-Bratzler shear force (WBSF) ...
Aring Eva - - 2007
BACKGROUND: The ability to keep steady fixation on a target is one of several aspects of good visual function. However, there are few reports on visual fixation during childhood in healthy children. METHODS: An infrared eye-tracking device (Orbit) was used to analyse binocular fixation behaviour in 135 non-clinical participants aged ...
Madden David J - - 2007
Older adults are often slower and less accurate than are younger adults in performing visual-search tasks, suggesting an age-related decline in attentional functioning. Age-related decline in attention, however, is not entirely pervasive. Visual search that is based on the observer's expectations (i.e., top-down attention) is relatively preserved as a function ...
Muftuoglu Orkun - - 2007
PURPOSE: To compare the photopic and scotopic contrast sensitivity with and without glare as well as blue color perception between eyes with an AcrySof SN60AT Natural intraocular lens (IOL) (Alcon Laboratories Inc.) and eyes with a conventional AcrySof SA60AT IOL. SETTING: Ankara University School of Medicine, Department of Ophthalmology, Ankara, ...
Bunce C - - 2008
AIM: The last complete report on causes of blindness in England and Wales was for data collected during April 1990 to March 1991. This current study sought to update these figures, with data collected during April 1999 to March 2000, and examine variation in cause by age group. METHODS: In ...
Abbott Emily J - - 2007
PURPOSE: The condition in which visual hallucinations (VHs) are solely associated with a visual impairment is termed Charles Bonnet Syndrome (CBS). The study was undertaken to investigate whether the extent of visual acuity (VA) loss and central visual field loss predisposes a patient with age-related macular degeneration (AMD) to develop ...
Cumming Robert G - - 2007
OBJECTIVES: To determine the efficacy of vision and eye examinations, with subsequent treatment of vision problems, for preventing falls and fractures in frail older people. DESIGN: Randomized, controlled trial. SETTING: Community in Sydney, Australia. PARTICIPANTS: Six hundred sixteen men and women aged 70 and older (mean age 81) recruited mainly ...
Long, Rowena Louise
Management of weed species is often complicated by the unknown status of their soil seed&#13;banks. Field trials for evaluating seed persistence, whilst accurate in their context, are timeconsuming&#13;and expensive. Weed scientists and land managers alike would benefit from a&#13;more rapid method for estimating weed seed longevity.&#13;This study aimed to develop ...
Picard Delphine - - 2007
Children's tactual, visual, and cross-modal transfer abilities for texture were investigated in a delayed matching-to-sample paradigm. Transfer performance from vision to touch was found to increase between 5 and 8 years of age, whereas transfer performance from touch to vision did not vary with age and matched touch-to-touch performance. Asymmetrical ...
Weiss Jayne S - - 2007
To assess the findings, visual morbidity, and surgical intervention in Schnyder crystalline corneal dystrophy (SCCD). Retrospective case series of 115 affected individuals from 34 SCCD families identified since 1989. Age, uncorrected visual acuity, best-corrected visual acuity (BCVA), corneal findings, and ocular surgery were recorded. Prospective phone, e-mail, or written contact ...
Veiel Lori L - - 2006
Previous research has demonstrated that younger adults are surprisingly poor at detecting substantial changes to visual scenes. Little is known, however, about age differences in this phenomenon. In the 2 experiments reported here, older adults were slower than younger adults in detecting changes to simple visual stimuli. This age difference ...
Avisar Rahamim - - 2006
BACKGROUND: The prevalence and incidence of blindness in Israel appear to be comparable to other western countries. Comparisons are difficult because of different definitions of blindness, and the uniqueness of the Israeli Registry of the Blind. OBJECTIVE: To characterize the population who were registered as Blind in Israel in the ...
Mapstone Mark - - 2006
The perception and control of self-movement relies on visual cues derived from the radial patterns of optic flow and from the relative motion of objects within view. Optic flow and object motion processing impairments might limit independent self-movement in a manner like that seen in ageing and in Alzheimer's disease. ...
Goldreich Daniel - - 2006
We compared the abilities of blind and sighted humans to distinguish grooved from smooth surfaces pressed against the stationary index fingertip. Ranging in age from 20 to 72 years, 37 blind and 47 sighted subjects participated in an automated two-alternative forced-choice tactile grating detection task. The tactile acuity of blind ...
Jadoon Mohammad Z - - 2006
PURPOSE: To determine the prevalence of blindness and visual impairment in adults aged 30 years and older in Pakistan and to assess socio-demographic risk factors. METHODS: Multistage, stratified (rural/urban), cluster random sampling, with probability proportional-to-size procedures, was used to select a nationally representative, cross-sectional sample of adults 30 years of ...
Klein Ronald - - 2006
PURPOSE: To describe the change in visual acuity in a 15-year period. DESIGN: Population-based study. METHODS: setting: Beaver Dam, Wisconsin. participants: 4068 persons 43 to 86 years of age at the time of a baseline examination in 1988 to 1990, and with follow-up examinations every five years thereafter. observation procedures: ...
Girkin Christopher A - - 2006
OBJECTIVE: To compare the diagnostic accuracy of the Moorfields regression classification (MRC) and subjective optic disc evaluation in discriminating early to moderate glaucomatous from nonglaucomatous eyes. DESIGN: Cross-sectional observational study. PARTICIPANTS: Two hundred thirty-three patients with glaucoma and 216 normal subjects were included in the analysis. Racial groups were defined ...
Li Yibin - - 2006
OBJECTIVE: To evaluate the prevalence of age-related maculopathy (ARM) in adult Chinese living in rural or urban regions of mainland China. DESIGN: Population-based prevalence study. METHODS: The study included 4439 subjects (aged 40 or more years) out of 5324 subjects invited to participate (response rate 83.4%). It was held in ...
Manning Hélène - - 2006
Young (21-26 years, n=20) and old (55-86 years, n=25) participants were tested for their ability to recognize raised letters (6-mm high, 1-mm relief) by touch. Spatial resolution thresholds were also measured with grating domes to derive an index of the degree of afferent innervation at the fingertip. Letter recognition in ...
Calixto Nassim - - 2006
PURPOSE: To determine the values in decibels of retinal sensitivity within the central 26 degrees of the visual field of normal subjects divided into homogenous age groups using the Octopus 1-2-3; to compare the values of retinal sensitivity we have found with those considered normal in the statistical package obtained ...
Renner Agnes B - - 2006
PURPOSE: To analyze the variability of clinical and electrophysiological characteristics in X-linked choroideremia and provide the first report of a negative electroretinogram in choroideremia. DESIGN: Retrospective study. PARTICIPANTS: The records of 18 male patients with choroideremia and 8 female carriers were evaluated. METHODS: The data were reviewed regarding visual acuity ...
Sadeghi André M - - 2006
PURPOSE: To estimate the age at diagnosis of retinitis pigmentosa and to determine visual acuity deterioration, visual field impairment and the frequency of cataracts in Usher syndrome types 1 and 2. METHODS: We carried out a retrospective study of 328 affected subjects with Usher syndrome types 1 and 2. Study ...
Laframboise Stéphane - - 2006
PURPOSE: This study was designed to evaluate the minimum interocular correlation (IOC) needed by the visual system to correctly perceive a static stereoscopic stimulus as a function of normal aging. It was also our goal to evaluate the feasibility of clinical charts testing this aspect of visual perception. METHODS: Stereoscopic ...
Horvat Michael - - 2006
For many populations the ability to move efficiently is compromised by an impaired muscular functioning. Strength development is necessary to overcome the effects of gravity to maintain posture and generate movement responses for mobility. The strength and power capabilities of individuals with total blindness (n = 12) were compared to ...
Scuffham, Paul Anthony
Purpose:We estimated the incidence and cost of accidental falls for the population with visual impairment, and the incidence and cost of falls directly attributable to visual impairment for the UK in 1999. Methods: A prevalence-based cost model of medical care was developed using national data for Accident and Emergency (A&E) ...
Brown Malcolm C - - 2006
A 35 month old child was referred for electrophysiology testing with pendular nystagmus, corresponding head oscillations and reduced vision. Flash visual evoked potential (VEP) revealed large responses at the right occiput (but not the left occiput) from the right eye and similar large responses at only the left occiput from ...
Kinsella-Shaw Jeffrey M - - 2006
The authors manipulated the circumstances in which individuals are typically embedded when standing upright by manipulating the intensity of light and the stationary structure of the environment. They expected that the manipulations would affect 12 older participants (aged 65-82 years) more than it would 12 younger participants (aged 22-24 years). ...
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