Base de dados : MEDLINE
Pesquisa : E01.370.380.850.950.500 [Categoria DeCS]
Referências encontradas : 9079 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 908 ir para página                         

  1 / 9079 MEDLINE  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
[PMID]:29340521
[Au] Autor:Oliveira AR; Campos Neto AA; de Andrade MJO; de Medeiros PCB; Dos Santos NA
[Ad] Endereço:Departamento de Psicologia, Universidade Federal de Campina Grande, Campina Grande, PB, Brasil.
[Ti] Título:Organic solvent exposure and contrast sensitivity: comparing men and women.
[So] Source:Braz J Med Biol Res;51(3):e6568, 2018 Jan 11.
[Is] ISSN:1414-431X
[Cp] País de publicação:Brazil
[La] Idioma:eng
[Ab] Resumo:The goal of this study was to compare the visual contrast sensitivity (CS) of men and women exposed and not exposed to organic solvents. Forty-six volunteers of both genders aged between 18 and 41 years (mean±SD=27.72±6.28) participated. Gas station attendants were exposed to gas containing 46.30 ppm of solvents at a temperature of 304±274.39 K, humidity of 62.25±7.59% and ventilation of 0.69±0.46 m/s (a passive gas chromatography-based sampling method was used considering the microclimate variables). Visual CS was measured via the psychophysical method of two-alternative forced choice using vertical sinusoidal gratings with spatial frequencies of 0.2, 0.5, 1.0, 2.0, 5.0, 10.0, and 16.0 cpd (cycles per degree) and an average luminance of 34.4 cd/m2. The results showed that visual CS was significantly lower (P<0.05) in the following groups: i) exposed men compared to unexposed men at frequencies of 0.2, 0.5, 1.0, and 2.0 cpd; ii) exposed women compared to unexposed women at a frequency of 5.0 cpd; and iii) exposed women compared to exposed men at a frequency of 0.5 cpd, even at exposures below the tolerance limit (300 ppm). These results suggest that the visual CS of exposed men was impaired over a wider range of spatial frequencies than that of exposed women. This difference may have been due to the higher body fat content of women compared to that of men, suggesting that body fat in women can serve as a protective factor against neurotoxic effects.
[Mh] Termos MeSH primário: Sensibilidades de Contraste/efeitos dos fármacos
Exposição Ocupacional/efeitos adversos
Solventes/efeitos adversos
Percepção Visual/fisiologia
[Mh] Termos MeSH secundário: Tecido Adiposo/anatomia & histologia
Adolescente
Adulto
Brasil/epidemiologia
Escolaridade
Feminino
Seres Humanos
Masculino
Microclima
Exposição Ocupacional/estatística & dados numéricos
Limiar Sensorial/fisiologia
Fatores Sexuais
Aprendizagem Espacial/fisiologia
Adulto Jovem
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Solvents)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180301
[Lr] Data última revisão:
180301
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180118
[St] Status:MEDLINE


  2 / 9079 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29222719
[Au] Autor:Bittner AK; Seger K
[Ad] Endereço:Nova Southeastern University, College of Optometry, 3200 S. University Drive, Fort Lauderdale, FL, 33328, USA. abittne1@jhmi.edu.
[Ti] Título:Longevity of visual improvements following transcorneal electrical stimulation and efficacy of retreatment in three individuals with retinitis pigmentosa.
[So] Source:Graefes Arch Clin Exp Ophthalmol;256(2):299-306, 2018 Feb.
[Is] ISSN:1435-702X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:PURPOSE: A small-scale randomized controlled trial conducted by our group found that four of seven retinitis pigmentosa (RP) subjects who received six weekly Transcorneal Electrical Stimulation (TES) sessions developed significant improvements in visual acuity (VA), quick contrast sensitivity function (qCSF), and/or Goldmann visual fields (GVF). We longitudinally monitored three of these participants for declining visual function due to natural RP progression to determine the duration of their responses and administered retreatments. METHODS: Over a period of 29-35 months, repeated ETDRS VA, qCSF and/or GVF tests and three to six TES treatment courses consisting of six weekly sessions were administered in each eye of three RP participants every four to 16 months in an unmasked, prospective case series study. RESULTS: For two participants, there were significant VA improvements of 44-52 letters (0.88-1.04 logMAR) and 15-23 letters (0.3-0.46 logMAR) in the worse eye at baseline after each of three or four treatment courses of TES compared to initial baseline. They had no significant decreases from baseline for VA or qCSF over 29 to 35 months, The third participant had a significant mean improvement in VA in the eye with better baseline vision (p = 0.004) and binocularly (p < 0.001) following six treatment courses over the 29-month period. For the first two participants, mean annual rates of GVF change for each eye ranged from -5% to 0% with the V4e stimulus, and -26% to +33% the III4e stimulus. The third participant's mean annual GVF changes were +14 to +35%, with a statistically significant improvement across 29 months for both the V4e and III4e stimuli in the right eye (p = 0.045; p = 0.015) and the V4e stimulus in the left eye (p = 0.047). CONCLUSION: Following encouraging visual improvements after TES that lasted for several months, it appears it may be possible to restore and prevent slowly diminishing vision over time with retreatments, which requires confirmation in a large-scale randomized controlled trial.
[Mh] Termos MeSH primário: Estimulação Elétrica/métodos
Retina/patologia
Retinite Pigmentosa/terapia
Baixa Visão/etiologia
Acuidade Visual
Campos Visuais
[Mh] Termos MeSH secundário: Adulto
Sensibilidades de Contraste
Córnea
Método Duplo-Cego
Feminino
Seguimentos
Seres Humanos
Masculino
Meia-Idade
Estudos Prospectivos
Retina/fisiopatologia
Retinite Pigmentosa/diagnóstico
Retinite Pigmentosa/fisiopatologia
Retratamento
Fatores de Tempo
Tomografia de Coerência Óptica
Resultado do Tratamento
Baixa Visão/fisiopatologia
Baixa Visão/terapia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RANDOMIZED CONTROLLED TRIAL
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180214
[Lr] Data última revisão:
180214
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171210
[St] Status:MEDLINE
[do] DOI:10.1007/s00417-017-3858-8


  3 / 9079 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28456533
[Au] Autor:Zharikova A; Gepshtein S; van Leeuwen C
[Ad] Endereço:Laboratory for Perceptual Dynamics, University of Leuven, Belgium. Electronic address: aleksandra.zharikova@kuleuven.be.
[Ti] Título:Paradoxical perception of object identity in visual motion.
[So] Source:Vision Res;136:1-14, 2017 07.
[Is] ISSN:1878-5646
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:In the course of perceptual organization, incomplete optical stimulation can evoke the experience of complete objects with distinct perceptual identities. According to a well-known principle of perceptual organization, stimulus parts separated by shorter spatial distances are more likely to appear as parts of the same perceptual identity. Whereas this principle of proximity has been confirmed in many studies of perceptual grouping in static displays, we show that it does not generalize to perception of object identity in dynamic displays, where the parts are separated by spatial and temporal distances. We use ambiguous displays which contain multiple moving parts and which can be perceived two ways: as two large objects that gradually change their size or as multiple smaller objects that rotate independent of one another. Grouping over long and short distances corresponds to the perception of the respectively large and small objects. We find that grouping over long distances is often preferred to grouping over short distances, against predictions of the proximity principle. Even though these effects are observed at high luminance contrast, we show that they are consistent with results obtained at the threshold of luminance contrast, in agreement with predictions of a theory of efficient motion measurement. This is evidence that the perception of object identity can be explained by a computational principle of neural economy rather than by the empirical principle of proximity.
[Mh] Termos MeSH primário: Reconhecimento Visual de Modelos/fisiologia
[Mh] Termos MeSH secundário: Sensibilidades de Contraste/fisiologia
Seres Humanos
Percepção de Movimento/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, N.I.H., EXTRAMURAL; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180213
[Lr] Data última revisão:
180213
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170501
[St] Status:MEDLINE


  4 / 9079 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28450052
[Au] Autor:Jennings BJ; Kingdom FAA
[Ad] Endereço:McGill Vision Research, Department of Ophthalmology, Montreal General Hospital, McGill University, Montreal, Quebec, Canada. Electronic address: ben.jennings@mcgill.ca.
[Ti] Título:Chromatic blur perception in the presence of luminance contrast.
[So] Source:Vision Res;135:34-42, 2017 06.
[Is] ISSN:1878-5646
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Hel-Or showed that blurring the chromatic but not the luminance layer of an image of a natural scene failed to elicit any impression of blur. Subsequent studies have suggested that this effect is due either to chromatic blur being masked by spatially contiguous luminance edges in the scene (Journal of Vision 13 (2013) 14), or to a relatively compressed transducer function for chromatic blur (Journal of Vision 15 (2015) 6). To test between the two explanations we conducted experiments using as stimuli both images of natural scenes as well as simple edges. First, we found that in color-and-luminance images of natural scenes more chromatic blur was needed to perceptually match a given level of blur in an isoluminant, i.e. colour-only scene. However, when the luminance layer in the scene was rotated relative to the chromatic layer, thus removing the colour-luminance edge correlations, the matched blur levels were near equal. Both results are consistent with Sharman et al.'s explanation. Second, when observers matched the blurs of luminance-only with isoluminant scenes, the matched blurs were equal, against Kingdom et al.'s prediction. Third, we measured the perceived blur in a square-wave as a function of (i) contrast (ii) number of luminance edges and (iii) the relative spatial phase between the colour and luminance edges. We found that the perceived chromatic blur was dependent on both relative phase and the number of luminance edges, or dependent on the luminance contrast if only a single edge is present. We conclude that this Hel-Or effect is largely due to masking of chromatic blur by spatially contiguous luminance edges.
[Mh] Termos MeSH primário: Percepção de Cores/fisiologia
Sensibilidades de Contraste/fisiologia
Erros de Refração/fisiopatologia
[Mh] Termos MeSH secundário: Seres Humanos
Luz
Estimulação Luminosa
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180213
[Lr] Data última revisão:
180213
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170429
[St] Status:MEDLINE


  5 / 9079 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29304135
[Au] Autor:Horváth G; Nemes VA; Radó J; Czigler A; Török B; Buzás P; Jandó G
[Ad] Endereço:Institute of Physiology, University of Pécs Medical School, Pécs, Hungary.
[Ti] Título:Simple reaction times to cyclopean stimuli reveal that the binocular system is tuned to react faster to near than to far objects.
[So] Source:PLoS One;13(1):e0188895, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Binocular depth perception is an important mechanism to segregate the visual scene for mapping relevant objects in our environment. Convergent evidence from psychophysical and neurophysiological studies have revealed asymmetries between the processing of near (crossed) and far (uncrossed) binocular disparities. The aim of the present study was to test if near or far objects are processed faster and with higher contrast sensitivity in the visual system. We therefore measured the relationship between binocular disparity and simple reaction time (RT) as well as contrast gain based on the contrast-RT function in young healthy adults. RTs were measured to suddenly appearing cyclopean target stimuli, which were checkerboard patterns encoded by depth in dynamic random dot stereograms (DRDS). The DRDS technique allowed us to selectively study the stereoscopic processing system by eliminating all monocular cues. The results showed that disparity and contrast had significant effects on RTs. RTs as a function of disparity followed a U-shaped tuning curve indicating an optimum at around 15 arc min, where RTs were minimal. Surprisingly, the disparity tuning of RT was much less pronounced for far disparities. At the optimal disparity, we measured advantages of about 80 ms and 30 ms for near disparities at low (10%) and high (90%) contrasts, respectively. High contrast always reduced RTs as well as the disparity dependent differences. Furthermore, RT-based contrast gains were higher for near disparities in the range of disparities where RTs were the shortest. These results show that the sensitivity of the human visual system is biased for near versus far disparities and near stimuli can result in faster motor responses, probably because they bear higher biological relevance.
[Mh] Termos MeSH primário: Tempo de Reação/fisiologia
Visão Binocular/fisiologia
[Mh] Termos MeSH secundário: Adulto
Sensibilidades de Contraste/fisiologia
Percepção de Profundidade/fisiologia
Feminino
Seres Humanos
Masculino
Estimulação Luminosa
Psicofísica
Disparidade Visual/fisiologia
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180210
[Lr] Data última revisão:
180210
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180106
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0188895


  6 / 9079 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28742617
[Au] Autor:Dimitry MES; Lewis AD; Zacharaki F; Chandran M; Robson D; Menon G; Poole TRG
[Ad] Endereço:The Eye Dept, Frimley Park Hospital, Frimley Health NHS Foundation Trust, Surrey, United Kingdom.
[Ti] Título:Simple Single-Pass Technique for Ultrathin Descemet Stripping Automated Endothelial Keratoplasty: A Pilot Study.
[So] Source:Cornea;36(10):1178-1183, 2017 Oct.
[Is] ISSN:1536-4798
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:PURPOSE: To assess intraoperative and postoperative graft thickness (GT) after donor deturgescence for ultrathin Descemet stripping automated endothelial keratoplasty and to evaluate visual outcomes, endothelial cell density, and patient satisfaction at 1 year. METHODS: Prospective interventional case series of patients with Fuchs endothelial dystrophy, Fuchs endothelial dystrophy and cataract, and pseudophakic bullous keratopathy (n = 12 grafts). The donor cornea was allowed to thin out by simple evaporation on an artificial anterior chamber, to the required precut thickness, before a single microkeratome pass. GT after microkeratome cut, at 1 week, 1, 3, 6, and 12, months was measured. Early Treatment Diabetic Retinopathy Study (ETDRS) best-corrected visual acuity, Pelli-Robson contrast sensitivity, endothelial cell density, and score on the visual function questionnaire (VFQ-25) were assessed. RESULTS: Mean intraoperative postmicrokeratome cut GT was 78.9 ± 33.3 µm. Mean GT at 1 week, 1, 3, 6, and 12 months was 70.7, 70.9, 62.8, 66.5, and 58.9 µm, respectively. Mean initial donor corneal thickness was 647 ± 67 µm, and mean precut thickness was 526 ± 4.5 µm (mean thinning time: 17 min). Best-corrected visual acuity at 1 week, 1, 3, 6, and 12 months was 68.8, 76.9, 76.3, 76.9, and 78.6 letters with 9-letter gain at 12 months (P = 0.02). Mean endothelial cell loss at 3, 6, and 12 months was 36.8% ± 6.75%, 37.2% ± 8%, and 37.9% ± 9.75% loss, respectively. At 1 year, 83.3% of patients achieved ≥20/40 (6/12) and 66.7% of patients achieved ≥20/32 (6/9.5). VFQ-25 testing showed an improvement in the visual function. CONCLUSIONS: This pilot study demonstrates a simple graft deturgescence technique that reproducibly creates ultrathin grafts without donor wastage.
[Mh] Termos MeSH primário: Ceratoplastia Endotelial com Remoção da Lâmina Limitante Posterior/métodos
Distrofia Endotelial de Fuchs/cirurgia
[Mh] Termos MeSH secundário: Idoso
Sensibilidades de Contraste/fisiologia
Paquimetria Corneana
Epitélio Posterior/patologia
Epitélio Posterior/transplante
Feminino
Seres Humanos
Período Intraoperatório
Masculino
Meia-Idade
Projetos Piloto
Período Pós-Operatório
Estudos Prospectivos
Doadores de Tecidos
Tomografia de Coerência Óptica
Acuidade Visual/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180209
[Lr] Data última revisão:
180209
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170726
[St] Status:MEDLINE
[do] DOI:10.1097/ICO.0000000000001273


  7 / 9079 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28460047
[Au] Autor:Swenor BK; Varadaraj V; Dave P; West SK; Rubin GS; Ramulu PY
[Ad] Endereço:The Wilmer Eye Institute, Johns Hopkins University, Baltimore, Maryland, United States.
[Ti] Título:Impact of the Ability to Divide Attention on Reading Performance in Glaucoma.
[So] Source:Invest Ophthalmol Vis Sci;58(5):2456-2462, 2017 05 01.
[Is] ISSN:1552-5783
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Purpose: To determine if the ability to divide attention affects the relationship between glaucoma-related vision loss and reading speed. Methods: Better eye mean deviation (MD), contrast sensitivity (CS), and better-eye distance visual acuity (VA) were measured in 28 participants with glaucoma and 21 controls. Reading speeds were assessed using MNRead, IRest, and sustained silent reading tests (words per minute, wpm). The ability to divide attention was measured using the Brief Test of Attention (BTA; scored 0-10). Multivariable linear regression models were used to determine the relationship between visual factors and reading speeds. Effect modification by BTA score (low BTA: <7; high BTA: ≥7) was examined. Results: Worse CS (per 0.1 log unit) was associated with slower maximum reading speed on MNRead test for participants with low BTA scores (ß = -9 wpm; 95% confidence interval [CI]: -16, -2), but not for those with high BTA scores (ß = -2 wpm; 95% CI: -6, +2). Similarly, for the IRest test, worse CS was associated with slower reading speeds (ß = -12 wpm; 95% CI: -20, -4) among those with low, but not high BTA scores (ß = -4 wpm; 95% CI: -10, +2). For the sustained silent reading test, glaucoma status (versus controls), worse visual field (VF) MD (per 5 dB), and worse CS were associated with 39%, 21%, and 19% slower reading speeds, respectively, for those with low BTA scores (P < 0.05), but these associations were not significant among those with high BTA scores (P > 0.1 for all). Conclusions: Decreased ability to divide attention, indicated by lower BTA scores, is associated with slower reading speeds in glaucoma with reduced CS and VF defects.
[Mh] Termos MeSH primário: Atenção
Sensibilidades de Contraste/fisiologia
Glaucoma/fisiopatologia
Leitura
Testes Visuais/métodos
Acuidade Visual
Campos Visuais/fisiologia
[Mh] Termos MeSH secundário: Idoso
Feminino
Seres Humanos
Masculino
Estudos Retrospectivos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL
[Em] Mês de entrada:1707
[Cu] Atualização por classe:180124
[Lr] Data última revisão:
180124
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170502
[St] Status:MEDLINE
[do] DOI:10.1167/iovs.17-21520


  8 / 9079 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29240758
[Au] Autor:Shapira A; Sterkin A; Fried M; Yehezkel O; Zalevsky Z; Polat U
[Ad] Endereço:Nano Photonics Center, the Institute of Nanotechnology and Advanced Materials, Faculty of Engineering, Bar-Ilan University, Ramat-Gan, Israel.
[Ti] Título:Increased gamma band activity for lateral interactions in humans.
[So] Source:PLoS One;12(12):e0187520, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Collinear facilitation of contrast sensitivity supported by lateral interactions within primary visual cortex is implicated in contour and object perception, with neural correlates in several frequency bands. Although higher component of the ERP power spectrum, the gamma-band, is postulated to reflect object representation, attention and memory, its neuronal source has been questioned, suggesting it is an artifact reflecting saccadic eye movements. Here we explored the gamma-band activity during collinear facilitation with no saccade-related confounds. We used single-trial spectral analysis of ERP in occipital channels in a time-window of nearly complete saccadic suppression and discarded sporadic trials containing saccades, in order to avoid saccadic artifacts. Although converging evidence suggests that gamma-band oscillations emerge from local excitatory-inhibitory balance involving GABAergic inhibition, here we show activity amplification during facilitatory collinear interactions, presumably dominated by excitations, in the gamma-band 150-350 milliseconds following onset of low near-threshold contrast stimulus. This result highlights the potential role of gamma-band oscillations in neuronal encoding of basic processes in visual perception. Thus, our findings suggest that gamma-band ERP spectrum analysis may serve as a useful and reliable tool for exploring basic perception, both in normal adults and in special populations.
[Mh] Termos MeSH primário: Potenciais Evocados
[Mh] Termos MeSH secundário: Sensibilidades de Contraste
Movimentos Oculares
Seres Humanos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180116
[Lr] Data última revisão:
180116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171215
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0187520


  9 / 9079 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29208832
[Au] Autor:Yadav S; Sahay P; Maharana PK; Titiyal JS; Vajpayee RB; Sharma N
[Ad] Endereço:Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.
[Ti] Título:Comparison of visual performance and after cataract formation between two monofocal aspheric intraocular lenses following phacoemulsification for senile cataract: A randomized controlled study.
[So] Source:Indian J Ophthalmol;65(12):1445-1449, 2017 Dec.
[Is] ISSN:1998-3689
[Cp] País de publicação:India
[La] Idioma:eng
[Ab] Resumo:PURPOSE: Monofocal aspheric intraocular lenses (IOLs) provide better visual outcome compared to other available IOLs following cataract surgery. However, the imported IOLs are expensive and are not affordable by all subset of patients in low- to middle-income countries like India. The aim of this study is to compare the safety and efficacy of a relatively low cost indigenous IOL (Acriol EC) with an imported aspheric IOL (AcrySof IQ). METHODS: A randomized controlled trial was conducted at a tertiary care centre. Two hundred and five eyes of 137 patients >45 years of age with uncomplicated age-related cataract were recruited. All cases underwent standard phacoemulsification and randomly assigned to one of the IOL implantations (Group I: AcrySof IOL; Group II: Acriol EC IOL). Primary outcome measure was best-corrected visual acuity (BCVA). Secondary outcomes included visual function (VF) score, spherical equivalent, contrast sensitivity, optical aberrations, and posterior capsular opacification. Independent t-test to compare two means; Mann-Whitney test; Pearson's Chi-square test, and McNemar's test were used for analyzing the nonparametric data such as incidence of posterior capsule opacification. RESULTS: There was no significant difference in the mean postoperative BCVA at 1, 3, 6, and 12 months in either group (P > 0.05). The contrast sensitivity, wavefront aberrations, VF score, and posterior capsular opacification were comparable between the groups except for higher-order aberrations and spherical aberration, which were higher in Group II. CONCLUSIONS: Acriol EC IOL provides visual outcomes comparable to other commonly used aspheric IOLs with comparable safety and efficacy at an affordable cost.
[Mh] Termos MeSH primário: Catarata/diagnóstico
Sensibilidades de Contraste/fisiologia
Lentes Intraoculares
Facoemulsificação/métodos
Acuidade Visual/fisiologia
[Mh] Termos MeSH secundário: Idoso
Feminino
Seguimentos
Seres Humanos
Masculino
Meia-Idade
Período Perioperatório
Estudos Prospectivos
Desenho de Prótese
Fatores de Tempo
Resultado do Tratamento
[Pt] Tipo de publicação:JOURNAL ARTICLE; RANDOMIZED CONTROLLED TRIAL
[Em] Mês de entrada:1712
[Cu] Atualização por classe:180103
[Lr] Data última revisão:
180103
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171207
[St] Status:MEDLINE
[do] DOI:10.4103/ijo.IJO_757_17


  10 / 9079 MEDLINE  
              first record previous record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:27773657
[Au] Autor:Matsumiya K; Sato M; Shioiri S
[Ad] Endereço:Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan. Electronic address: kmat@riec.tohoku.ac.jp.
[Ti] Título:Contrast dependence of saccadic blanking and landmark effects.
[So] Source:Vision Res;129:1-12, 2016 12.
[Is] ISSN:1878-5646
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Two phenomena have been reported to affect the perceived displacement of a visual target during saccadic eye movements: the blanking effect and landmark effect. In the blanking effect, temporarily blanking the target after a saccade improves displacement judgments. In the landmark effect, illusory target displacement occurs when a continuously presented landmark is displaced during a saccade, and the target is temporarily blanked after the saccade without displacement. We show that the strengths of the blanking and landmark effects vary with stimulus contrast. In the blanking effect, target displacement detection rate increased with luminance contrast of the target. In the landmark effect, illusory target displacement decreased with luminance contrast of the target. Moreover, the landmark effect was found even for stimuli without luminance contrast (equiluminant color stimuli), while the blanking effect disappeared. These results can be attributed to a reduction in sensitivity of target displacement by a reduction of luminance contrast, which suggests that changes in luminance, or transient signals, play a critical role in visual stability across saccades.
[Mh] Termos MeSH primário: Sensibilidades de Contraste/fisiologia
Fixação Ocular/fisiologia
Movimentos Sacádicos/fisiologia
[Mh] Termos MeSH secundário: Adulto
Análise de Variância
Feminino
Seres Humanos
Iluminação
Estimulação Luminosa/métodos
Percepção Visual
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171222
[Lr] Data última revisão:
171222
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161107
[St] Status:MEDLINE



página 1 de 908 ir para página                         
   


Refinar a pesquisa
  Base de dados : MEDLINE Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde