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Results 301 - 350 of 1012
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Wang Yi-Zhong - - 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 - - 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 ...
Zwergal A - - 2009
OBJECTIVE: Validation of a bedside test to measure the monocular and binocular subjective visual vertical (SVV). METHODS: Monocular and binocular measurements of the SVV were made in 30 healthy subjects (mean age 46.1 +/- 16.4 years) and 30 patients with acute peripheral or central vestibular lesions (mean age 51.3 +/- ...
Trager Michelle J - - 2009
PURPOSE: To determine the testability of several vision and refraction tests in preschool-aged children. DESIGN: Population-based study of Chinese preschool-aged children in Singapore. METHODS: One thousand five hundred and forty-two Singaporean Chinese children aged 6 to 72 months were recruited through door-to-door screening of government-subsidized apartments in Singapore. Trained eye ...
Anand Seema - - 2009
PURPOSE: To document the evolution of geographic atrophy in the peripherin/RDS Arg172Trp substitution, provide age-related estimates of visual acuity, and compare with other missense mutations with a similar phenotype (Arg142Trp, Arg172Gln, and Arg195Leu). METHODS: Total area of geographic atrophy in 18 affected individuals with the peripherin/RDS Arg172Trp substitution was measured ...
Pesquer Lionel - - 2009
PURPOSE: To report the normal sonographic anatomy of the triangular fibrocartilage (TFC) of the wrist in cadavers and volunteers. METHOD: Five hands from cadavers were examined sonographically before and after wrist dissection, during which the TFC was marked with surgical wires. Twenty volunteers without wrist limitation or pain, and without ...
Nowak Michal S - - 2009
PURPOSE: To evaluate the prevalence of correctable and non-correctable visual impairment in a representative sample of young males commissioned for Military Service in Poland. MATERIAL AND METHODS: Data concerning vision status was retrospectively reviewed in 969 subjects of European Caucasian origin, most of whom live and have lived in Poland. ...
Norton Daniel - - 2009
Visual sensitivity decreases with age, and this presumably has an impact on face recognition. However, the relationship between aging in basic visual processing and in the sensory and cognitive mechanisms mediating face recognition is not well understood. Face detection, a foundational step in recognizing faces, relies primarily on sensory information. ...
Liang Yuan Bo - - 2009
PURPOSE: To describe the rationale, design, methodology and baseline characteristics of the Handan Eye Study (HES), a population-based study to determine the prevalence and impact of visual impairment and major ocular diseases in Chinese adults living in a rural region north China. METHODS: Population-based, cross-sectional study. 6830 Han people aged ...
Neelam Kumari - - 2009
Age-related macular degeneration (AMD), the late stage of age-related maculopathy (ARM), is the leading cause of blind registration in developed countries. The visual loss in AMD occurs due to dysfunction and death of photoreceptors (rods and cones) secondary to an atrophic or a neovascular event. The psychophysical tests of vision, ...
Al-Maskari A - - 2009
PURPOSE: To report phenotypic progression for a novel mutation in the RPGRgene causing X-linked retinitis pigmentosa (RP), and describe the phenotype in affected males and females. METHODS: Bidirectional fluorescent sequencing analysis was used to screen for mutations in RPGR. Five affected males and eight affected females from two English families ...
Kutzbach Beth R - - 2009
INTRODUCTION: Human albinism is a genetic condition associated with visual impairment that affects many aspects of daily life. Office measurements of visual acuity do not necessarily reflect daily visual function and health status. This study used the National Eye Institute Visual Function Questionnaire (NEI-VFQ) to determine the effect of albinism-associated ...
Karas Renee - - 2009
It is well established that many visual functions deteriorate with age. Perhaps counter-intuitively, a recent study revealed that older people actually require less time to discriminate the direction of motion of large, high contrast moving stimuli than young adults (L. R. Betts, C. P. Taylor, A. B. Sekuler, & P. ...
Tang Yong - - 2009
Many visual functions are known to decline during aging (P. D. Spear, 1993). However there has been no clear description as to how contrast sensitivity for second-order stimuli changes across the adult life span. Based on different mechanisms underlying perception of first-/second-order stimuli (Z. L. Lu & G. Sperling, 2001), ...
Mancuso Daniela Nardi - - 2009
OBJECTIVES: The objective of this study was to evaluate by a visual method of comparison the color stability of nonpigmented and pigmented facial silicones after accelerated aging. MATERIALS AND METHODS: Two kinds of silicones were used in this study; one specifically formulated for facial prostheses and the other an acetic ...
Kiat-amnuay Sudarat - - 2009
OBJECTIVES: To determine the effects of opacifiers and silicone pigments on the color stability of silicone A-2000 maxillofacial prosthetic elastomers subjected to artificial aging. METHODS: Seventy-five groups (n=5) were made by various combinations (5%, 10%, and 15%) of four dry earth opacifiers (Georgia kaolin, Gk; calcined kaolin, Ck; Artskin white, ...
Kozel F Andrew - - 2009
BACKGROUND: Several studies support the use of fMRI for detecting deception. There have been, however, no reported replications on different scanners or at different locations. In a previous study, deception was accurately detected in at least 90% of the participants in two independent cohorts. This study attempted to replicate those ...
Inaba Hirofumi - - 2009
We report the cases of a father and his son with spinocerebellar ataxia type 7 (SCA7), a disorder rarely reported in Japan. The father had noticed dysarthria at age 38, and gait instability at age 46. Visual disturbance was noted 3 years later. Neurological examination at age 54 revealed visual ...
Marques Junia Cabral - - 2009
To evaluate the performance of automated perimetry of elderly subjects naïve to AP after listening to a Mozart sonata. Automated perimetry (AP) is a psychophysical test used to assess visual fields in patients with neurological disorders and glaucoma. In a previous study, Fiorelli et al. showed that young subjects who ...
Kyari Fatima - - 2009
PURPOSE: To determine the prevalence of blindness and visual impairment among adults aged > or = 40 years in Nigeria. METHODS: Multistage, stratified, cluster random sampling with probability proportional to size procedures was used to identify a cross-sectional nationally representative sample of 15,027 persons > or = 40 years of ...
Rahi Jugnoo S - - 2009
PURPOSE: To describe the prevalence of impaired vision and its relative burden, together with the prevalence of impaired vision-related quality of life (VRQOL), and investigate associations with social outcomes in a contemporary and nationally representative population of working age adults. DESIGN: Population-based cross-sectional study. PARTICIPANTS: We included 9330 members of ...
Klein Barbara E K - - 2009
Long-lived parents tend to have children with longer life than their age peers. Long life may be at the cost of increased frailty as measured by specific biomarkers. Determining whether biomarkers of aging in children of long-lived parents are more favorable compared to children of parents with shorter lifespan is ...
Slessor Gillian - - 2008
Previous research has investigated age differences in complex social perception tasks such as theory of mind and emotion recognition, with predominant findings of age-related declines. The present study investigated whether there are also age-related changes in basic aspects of social perception. Individuals' ability both to detect subtle differences in eye-gaze ...
Alexander Gerianne M - - 2009
An individual's reproductive potential appears to influence response to attractive faces of the opposite sex. Otherwise, relatively little is known about the characteristics of the adult observer that may influence his or her affective evaluation of male and female faces. An untested hypothesis (based on the proposed role of attractive ...
Legge Gordon E - - 2008
Previous studies of tactile acuity on the fingertip, using passive touch, have demonstrated an age-related decline in spatial resolution for both sighted and blind subjects. We have reexamined this age dependence with two newly designed tactile-acuity charts that require active exploration of the test symbols. One chart used dot patterns ...
Shi Wen - - 2008
Increasingly, automobile designers are utilizing tinted glasses for concept cars, specialty models, or to differentiate their vehicles. The objective of this study was to assess whether alternating different tinted windshields would affect aging drivers' visual acuity and glare response. Two commercially available windshields (bluish and greenish with same transmittance) were ...
Vukicevic Meri - - 2008
BACKGROUND: Charles Bonnet Syndrome (CBS) is characterized by vivid, elaborate and recurrent visual hallucinations in psychologically normal people. It most often occurs in older, visually impaired persons. The prevalence of the syndrome has been reported at 1-40% in Asia, Europe and North America. The aim of this study was to ...
Li Zhijian - - 2008
PURPOSE: The purpose of this study was to estimate the prevalence and causes of visual impairment(VI) and blindness by a population-based survey in an elderly rural Chinese population. METHODS: Cluster sampling was used to select samples. The protocol consisted of an interview, pilot study, visual acuity (VA) testing and a ...
Kljajić Zlatko - - 2008
The aim of this study was to determine the incidence of acute angle-closure glaucoma in Split-Dalmatia County and correlation between visual acuity and time (days) elapsed from the disease onset to hospital admission. Twenty-nine cases were retrospectively analyzed. There were 19 female patients aged 36-91 (median age 68) years and ...
Hahn Gesa Astrid - - 2009
BACKGROUND: Patients with early age-related maculopathy (ARM) do not necessarily show obvious morphological signs or functional impairment. Many have good visual acuity, yet complain of decreased visual performance. The aim of this study was to investigate the aging effects on performance of parafoveal letter recognition at reduced contrast, and defects ...
Liang Yuan Bo - - 2008
PURPOSE: To describe the prevalence and causes of low vision and blindness in a rural population in Northern China. DESIGN: Population-based, cross-sectional study. PARTICIPANTS: A study of 6830 Han Chinese aged 30 years and older was conducted between October 2006 and October 2007 in rural Yongnian County in Handan, Northern ...
Wong Tien Yin - - 2008
OBJECTIVE: To describe the prevalence and causes of low vision and blindness in a Malay population. METHODS: A population-based, cross-sectional study of 3280 participants of Malay ethnicity, aged 40 to 79 years, was conducted. Participants underwent standardized ophthalmic assessments to determine (1) presenting and best-corrected visual acuity according to US ...
- - 2008
To determine the visual acuity outcome at age 10 years for children younger than 7 years when enrolled in a treatment trial for moderate amblyopia. In a multicenter clinical trial, 419 children with amblyopia (visual acuity, 20/40-20/100) were randomized to patching or atropine eyedrops for 6 months. Two years after ...
Mitchell Jan - - 2008
PURPOSE: To investigate the MacDQoL test-retest reliability and sensitivity to change in vision over a period of one year in a sample of patients with age-related macular degeneration (AMD). DESIGN: A prospective, observational study. METHOD: Patients with AMD from an ophthalmologist's list (n = 135) completed the MacDQoL questionnaire by ...
Harwerth Ronald S - - 2008
Age-related losses in retinal nerve fiber layer (RNFL) thickness have been assumed to be the result of an age-dependent reduction of retinal ganglion cells (RGCs), but the published rates differ: age-related losses of RGCs of approximately 0.6%/year compared to 0.2%/year for thinning of the RNFL. An analysis of normative data ...
Horwood Anna M - - 2008
A remote haploscopic video refractor was used to assess vergence and accommodation responses in a group of 32 emmetropic, orthophoric, symptom free, young adults naïve to vision experiments in a minimally instructed setting. Picture targets were presented at four positions between 2 m and 33 cm. Blur, disparity and looming ...
Edén Ulla - - 2008
PURPOSE: To investigate the epidemiology of aniridia in the populations of Sweden and Norway. METHODS: A thorough search for aniridia patients has been performed in Sweden and Norway. All participants had a clinical ophthalmological examination documented through photography. Blood samples were taken for mutation analysis and pedigrees were established. RESULTS: ...
Maaijwee Kristel - - 2008
PURPOSE: To statistically analyze the test-retest and inter-chart reliability of the newly developed actual logarithmically scaled Dutch Radner Reading Charts in an older population affected by macular disease. These Dutch Radner Reading Charts are developed according to the strict principles of sentence construction of the originally German language Radner Reading ...
Antona Beatriz - - 2008
BACKGROUND: The use of plus lenses to compensate for the reduction in the range of accommodation associated with presbyopia, brings the near point of accommodation to a comfortable distance for near visual tasks. Our aim was to compare the tentative near addition determined using the most common procedures with the ...
Gerth Christina - - 2008
PURPOSE: Infantile esotropia is associated with maldevelopment of cortical visual motion processing, manifested as directional asymmetry of motion visual evoked potentials (mVEPs). The purpose of this study was to determine whether early surgery at or before age 11 months could promote the development of cortical visual motion processing in human ...
Billino Jutta - - 2008
While the percentage of older people in our society is steadily increasing, knowledge about perceptual changes during healthy aging is still limited. We investigated age effects on visual motion perception in order to differentiate between general decline and specific vulnerabilities. A total of 119 subjects ranging in age from 20 ...
Gohel Parin S - - 2008
Age-related macular degeneration is a chronic disease leading to progressive central vision loss. It is the leading cause of irreversible blindness in the United States, most commonly affecting white Caucasians aged more than 55 years. Typical symptoms include decreased central vision, central scotoma, and metamorphopsia. Patients with acute loss of ...
Victor Ligia Valéria - - 2008
This cross-sectional study evaluated the periodontal status and the presence of periodontopathogens in 132 young, black ethnic subjects who live in Salvador/Bahia-Brazil and have never smoked. Periodontal Probing Depth (PPD), Clinical Attachment Level (CAL), Plaque Index (PI) and Gingival Index (GI) were measured and analyzed by ANOVA and Wilcoxon tests ...
Lorenzo-López Laura - - 2008
Differences in the neural systems underlying visual search processes for young (n=17, mean age 19.6+/-1.9) and older (n=22, mean age 68.5+/-6) subjects were investigated combining the Event-Related Potential (ERP) technique with standardized Low-Resolution brain Electromagnetic Tomography (sLORETA) analyses. Behavioral results showed an increase in mean reaction times (RTs) and a ...
Waszak Florian - - 2009
The age-correlated gains and losses in visual identification under backward pattern masking were studied in a representative sample of 226 individuals ranging from 6 to 88 years of age. Participants identified masked symbols at leisure under high and low stimulus quality and at varying Stimulus Onset Asynchronies. Performance increased from ...
Farooq Shegufta J - - 2008
PURPOSE: The effect of aging on torsional optokinetic nystagmus (tOKN) is unknown. The authors investigated changes in tOKN associated with aging in a group of healthy subjects. METHODS: Monocular torsional eye movements were recorded from 30 subjects between 19 and 72 years of age. Constant-velocity rotary stimuli in clockwise and ...
O'Connor P M - - 2008
AIMS: To determine the independent predictors of rehabilitation needs for people with low vision using the Impact of Vision Impairment questionnaire (IVI) to measure the quality-of-life consequences of vision-specific restrictions on participation in activities of daily living. METHODS: Patients attending low vision clinics completed the IVI and provided personal and ...
Yabunaka Koichi - - 2008
PURPOSE: To use transabdominal sonography to determine the frequency of visualization of the adult normal appendix in patients with suspected acute infectious enteritis (AIE) compared with patients with acute appendicitis (AA) and a control group. METHODS: A total of 296 patients divided into 3 different groups underwent sonographic examination, including ...
Roch-Levecq Anne-Catherine - - 2008
OBJECTIVES: To examine cognitive abilities of low-income preschoolers with uncorrected ametropia and effects of spectacle correction. METHODS: Baseline and 6-week data from a longitudinal controlled study were analyzed. Subjects were 70 preschoolers (mean age, 4.6 years; 60.0% were female; and 85.7% were Latino), including 35 children with previously uncorrected ametropia ...
Andersen George J - - 2008
Age-related declines in vision are well documented in the literature. In the present study we examined whether changes in spatial or temporal integration contribute to this decline. Younger (mean age of 21) and older (mean age of 745) subjects were asked to identify 2D shapes based on kinetic occlusion information---the ...
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