Vision Science and its Applications最新文献_第6页

The Temporal Characteristics of Eye Growth Control Mechanisms Differ Following Optic Nerve Section 视神经切除后眼生长控制机制的时间特征不同

Vision Science and its Applications Pub Date : 1900-01-01 DOI: 10.1364/vsia.1997.sad.3

D. Troilo, E. Francis, Glara Yi

引用次数: 3

Relation between Self-Perceived Status of Visual Functioning (VF-14) and Indices of Functional Vision Derived from Visual Acuity Measurements 视功能自我知觉状态(VF-14)与视敏度测量所得功能性视觉指标的关系

Vision Science and its Applications Pub Date : 1900-01-01 DOI: 10.1364/vsia.1998.sae.5

N. Fontaine, J. Gresset, H. Boisjoly, I. Brunette, M. Le François, J. Deschênes, R. Bazin, P. Laughrea, I. Dubé, M. Charest

{"title":"Relation between Self-Perceived Status of Visual Functioning (VF-14) and Indices of Functional Vision Derived from Visual Acuity Measurements","authors":"N. Fontaine, J. Gresset, H. Boisjoly, I. Brunette, M. Le François, J. Deschênes, R. Bazin, P. Laughrea, I. Dubé, M. Charest","doi":"10.1364/vsia.1998.sae.5","DOIUrl":"https://doi.org/10.1364/vsia.1998.sae.5","url":null,"abstract":"Many sources have advocated the use of indices of functional vision to measure the severity of visual impairment and their consequences on the quality of life. Different methods have been proposed. Traditional methods rely on monocular or binocular visual acuity (VA). The severity scale of impairment of the World Health Organisation1 is based on the best-eye VA and/or on the visual field. Other methods use various combinations of monocular VA (expressed as percentages) to calculate \"weighted binocular scores\", as proposed by the American Medical Association2 or Colenbrander3. A more recent approach, relies on the self-perceived status of visual functioning as measured by vision-related questionnaires. A variety of instruments have been devised to assess vision-targeted functional performance associated with visual impairment in subjects with cataract4-7. Of these, the Visual Functioning Index (VF-14) is one of the most widely used. The reliability, validity as well as the responsive ness of the VF-14 has been well documented in the case of cataract surgery7-10. In addition, this questionnaire has recently been validated for the evaluation of corneal and other ocular diseases11, 12","PeriodicalId":428257,"journal":{"name":"Vision Science and its Applications","volume":"278 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115425315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Representing corneal shape 代表角膜形状

Vision Science and its Applications Pub Date : 1900-01-01 DOI: 10.1364/vsia.1995.fc2

S. A. Klein, R. Mandell, B. Barsky

引用次数: 5

The Effects of Cross-Spatial-Frequency Adaptation on Speed Discrimination 跨空间频率自适应对速度判别的影响

Vision Science and its Applications Pub Date : 1900-01-01 DOI: 10.1364/vsia.1996.sad.2

Yue Chen, H. Bedell, L. Frishman

{"title":"The Effects of Cross-Spatial-Frequency Adaptation on Speed Discrimination","authors":"Yue Chen, H. Bedell, L. Frishman","doi":"10.1364/vsia.1996.sad.2","DOIUrl":"https://doi.org/10.1364/vsia.1996.sad.2","url":null,"abstract":"The coding of stimulus speed has been accepted to be an important component of motion processing in the visual system. How this coding is implemented, however, is still not entirely clear. In terms of its relationship with spatial and temporal contents of moving targets, speed processing is often modeled as a two-stage process (e.g. Heeger, 1990; Smith & Edgar, 1994). In the first stage, initial speed estimates are generated within individual spatial- and temporal-frequency-tuned mechanism. In the second stage, the outputs of multiple spatio-temporal frequency mechanisms from the first stage are combined to produce the speed codes that are then invariant with respect to spatial frequency. This descriptive model for speed coding makes sense from both functional and experimental perspectives. Functionally, speed coding in the visual system should not vary with respect to spatial frequency; otherwise, non-identical speed coding among spatial frequency mechanisms would perceptually make the different spatial frequency components of a single target appear to move incoherently. Experimentally, it has been demonstrated that whereas the responses of neurons at early stages, such as in VI, are spatial-frequency-tuned, the responses of some neurons at later stages, such as in MT, have broader spatial frequency bandwidths (Newsome, Gizzi & Movshon, 1983), which presumably represent the combination of inputs from several lower-level spatial frequency mechanisms.","PeriodicalId":428257,"journal":{"name":"Vision Science and its Applications","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124699535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluating the PAR Corneal Topography System: A Preliminary Study 评估PAR角膜地形图系统:初步研究

Vision Science and its Applications Pub Date : 1900-01-01 DOI: 10.1364/vsia.1996.sub.4

R. Munger, E. Casson, W. B. Jackson

引用次数: 0

Eye-Movement Tracking Using Compressed Video Images 使用压缩视频图像进行眼动跟踪

Vision Science and its Applications Pub Date : 1900-01-01 DOI: 10.1364/vsia.1995.sae9

J. Mulligan, B. Beutter, Cynthia H. Hull

引用次数: 8

On the Generation of Spherical Aberration and Coma of Variable Magnitude 变星等球差和彗差的产生

Vision Science and its Applications Pub Date : 1900-01-01 DOI: 10.1364/vsia.1998.sub.4

N. López-Gil, B. Howland, Neil W. Charman, R. Applegate, H. Howland

引用次数: 0

Reading of Dynamically Displayed Text by Low Vision Observers 低视力观察者对动态显示文本的阅读

Vision Science and its Applications Pub Date : 1900-01-01 DOI: 10.1364/vsia.1995.sub4

E. M. Fine, E. Peli, A. Labianca

{"title":"Reading of Dynamically Displayed Text by Low Vision Observers","authors":"E. M. Fine, E. Peli, A. Labianca","doi":"10.1364/vsia.1995.sub4","DOIUrl":"https://doi.org/10.1364/vsia.1995.sub4","url":null,"abstract":"When compared to the time required to read a normally displayed page of text, low vision observers read faster from a scroll display, in which the text is continuously panned across a computer screen (Legge et al., 1989). They also read faster from a rapid serial visual presentation (RSVP) display in which each word is presented to the same place on a computer screen (Rubin & Turano, 1994). The views seen from the scroll display are similar to what would be seen when a magnifier or other low vision aid is scanned across a page of text. Readers with low vision are reported to read text displayed in this manner about 15% faster than a static page of text (Legge et al., 1989). As Legge et al. point out, this advantage may be due, in part, to the time saved because no return sweeps are needed to reposition the eyes at the beginning of the next line of text. This return sweep is time consuming for normally sighted observers (Rayner, 1978), and even more so for low vision observers who are known to have difficulty with eye movement control (cf. Peli, 1986; Whittaker et al., 1991). This advantage for scroll displays was not seen for normally sighted observers in Legge et al.'s study. In fact, they read 44% slower on average.","PeriodicalId":428257,"journal":{"name":"Vision Science and its Applications","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125183642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Generalized Image Processing Application for the Enhancement of Images for the Visually Impaired 一种用于视障人士图像增强的广义图像处理应用

Vision Science and its Applications Pub Date : 1900-01-01 DOI: 10.1364/vsia.1998.sae.4

Andrew Kennedy, S. Leat, M. Jernigan

引用次数: 3

Flicker Sensitivity in Patients with Retinitis Pigmentosa and Good Acuity 色素性视网膜炎患者的闪烁敏感性和良好的视力

Vision Science and its Applications Pub Date : 1900-01-01 DOI: 10.1364/vsia.1995.tua1

W. Swanson, M. Fiedelman, G. Fish

引用次数: 1