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Visual Quality (visual + quality)
Selected AbstractsUser-Controllable Color TransferCOMPUTER GRAPHICS FORUM, Issue 2 2010Xiaobo An This paper presents an image editing framework where users use reference images to indicate desired color edits. In our approach, users specify pairs of strokes to indicate corresponding regions in both the original and the reference image that should have the same color "style". Within each stroke pair, a nonlinear constrained parametric transfer model is used to transfer the reference colors to the original. We estimate the model parameters by matching color distributions, under constraints that ensure no visual artifacts are present in the transfer result. To perform transfer on the whole image, we employ optimization methods to propagate the model parameters defined at each stroke location to spatially-close regions of similar appearance. This stroke-based formulation requires minimal user effort while retaining the high degree of user control necessary to allow artistic interpretations. We demonstrate our approach by performing color transfer on a number of image pairs varying in content and style, and show that our algorithm outperforms state-of-the-art color transfer methods on both user-controllability and visual qualities of the transfer results. [source] The Sound of Silence: Valuing Acoustics in Heritage ConservationGEOGRAPHICAL RESEARCH, Issue 3 2008PENNY O'CONNOR Abstract This paper explores the reasons behind the omission of historic acoustic values from heritage assessments in Australia. Best practice dictates that all cultural heritage values associated with significant places should be assessed in order to make informed conservation and management decisions. However, the multi-sensory nature of aesthetics has been reframed in guidance documentation in ways that run counter to the primary frame. Conventions that have developed around the way places are assessed also work against comprehensive identification of values. As a result, the consideration of aesthetics in cultural heritage is limited to contemporary visual qualities. Furthermore, because the assessment of historic value takes a diachronic rather than synchronic approach, we have little knowledge of the places past communities valued for the sounds they experienced there. Research into landscape preference and acoustic ecology highlights the importance of identifying the inherent acoustic dimension of places and the role sound plays in developing a sense of place. Two landscape areas in Western Australia's south-west with historic acoustic values, the Boranup Sand Patch and the Lower Reaches of the Blackwood River, illustrate how historic soundscapes can provide insightful contrasts and resonances with contemporary values, and how vulnerable such places are when the sound of place is overlooked in land management policies. [source] Significant improvements in near vision, reading speed, central visual field and related quality of life after ranibizumab treatment of wet age-related macular degenerationACTA OPHTHALMOLOGICA, Issue 4 2010Christina Frennesson Abstract. Purpose:, To investigate the effects on near visual acuity, reading speed, central visual field and related quality of life of ranibizumab treatment of wet age-related macular degeneration (AMD). Methods:, The study was a prospective, non-comparative consecutive case series, followed for 3 months and investigator-driven. Thirty eyes of 30 patients with wet AMD were included, mean age 75 years (range 69,95 years). In addition to a full ophthalmological examination , including best-corrected visual acuity (BCVA; Early Treatment Diabetic Research Study chart), fundus biomicroscopy, fundus photography, fluorescein angiography, indocyanine green angiography (occult cases) and ocular coherence tomography , near visual acuity, reading speed, central visual field and quality of life for related activities were also investigated at baseline and at 3 months after ranibizumab treatment. Results:, Mean BCVA increased from 62 ± 11 to 66 ± 14 letters at 3 months (7%; p = 0.018). Near vision improved from 9 ± 5 to 6 ± 3 points (33%; p = 0.0006) and reading speed increased from 59 ± 40 to 85 ± 50 words/min (44%; p < 0.0001). The mean deviation from normal of the visual field improved from ,9 ± 7 to ,6 ± 5 dB (33%; p < 0.0001). Quality of life improved for distance activities from 54 ± 28 to 63 ± 28 points (17%; p < 0.0001) but significantly (p = 0.024) more for near activities, from 49 ± 26 to 63 ± 26 points (29%; p < 0.0001). Reading newspaper text in the group in which the better eye was treated showed the highest increase in quality of life score of all: 116%. Conclusion:, The increase in BCVA after ranibizumab treatment is well established. The present study also showed significant improvements in other important visual qualities, such as near visual acuity, reading speed, central visual field and several activities influencing quality of life. The improvement was greater for near activities than for distance activities. Therefore, the beneficial effects of ranibizumab treatment shown here are more extensive than those reported previously. [source] A Screen Space Quality Method for Data AbstractionCOMPUTER GRAPHICS FORUM, Issue 3 2008J. Johansson Abstract The rendering of large data sets can result in cluttered displays and non-interactive update rates, leading to time consuming analyses. A straightforward solution is to reduce the number of items, thereby producing an abstraction of the data set. For the visual analysis to remain accurate, the graphical representation of the abstraction must preserve the significant features present in the original data. This paper presents a screen space quality method, based on distance transforms, that measures the visual quality of a data abstraction. This screen space measure is shown to better capture significant visual structures in data, compared with data space measures. The presented method is implemented on the GPU, allowing interactive creation of high quality graphical representations of multivariate data sets containing tens of thousands of items. [source] Texture Synthesis using Exact Neighborhood MatchingCOMPUTER GRAPHICS FORUM, Issue 2 2007M. Sabha Abstract In this paper we present an elegant pixel-based texture synthesis technique that is able to generate visually pleasing results from source textures of both stochastic and structured nature. Inspired by the observation that the most common artifacts that occur when synthesizing textures are high-frequency discontinuities, our technique tries to avoid these artifacts by forcing at least one of the direct neighboring pixels in each causal neighborhood to match within a predetermined threshold. This does not only avoid deterioration of the visual quality, but also results in faster synthesis timings. We demonstrate our technique on a variety of stochastic and structured textures. [source] Managing QoS requirements for video streaming: from intra-node to inter-nodeINTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS, Issue 5 2006Y. Bai Abstract Streaming video over IP networks has become increasingly popular; however, compared to traditional data traffic, video streaming places different demands on quality of service (QoS) in a network, particularly in terms of delay, delay variation, and data loss. In response to the QoS demands of video applications, network techniques have been proposed to provide QoS within a network. Unfortunately, while efficient from a network perspective, most existing solutions have not provided end-to-end QoS that is satisfactory to users. In this paper, packet scheduling and end-to-end QoS distribution schemes are proposed to address this issue. The design and implementation of the two schemes are based on the active networking paradigm. In active networks, routers can perform user-driven computation when forwarding packets, rather than just simple storing and forwarding packets, as in traditional networks. Both schemes thus take advantage of the capability of active networks enabling routers to adapt to the content of transmitted data and the QoS requirements of video users. In other words, packet scheduling at routers considers the correlation between video characteristics, available local resources and the resulting visual quality. The proposed QoS distribution scheme performs inter-node adaptation, dynamically adjusting local loss constraints in response to network conditions in order to satisfy the end-to-end loss requirements. An active network-based simulation shows that using QoS distribution and packet scheduling together increases the probability of meeting end-to-end QoS requirements of networked video. Copyright © 2005 John Wiley & Sons, Ltd. [source] Reassessment of treatments to retard browning of fresh-cut Russet potato with emphasis on controlled atmospheres and low concentrations of bisulphiteINTERNATIONAL JOURNAL OF FOOD SCIENCE & TECHNOLOGY, Issue 7 2010Yurong Ma Summary The cultivar Pacific Russet with high browning susceptibility was used for most testing. Controlled atmospheres (0.3%, 3% and 21% O2 in combination with 0%, 6% or 12% CO2) and anti-browning chemicals were studied in relation to quality retention and wound-induced phenolic metabolism of fresh-cut slices for up to 16 days at 5 °C. The 3% O2+ 12% CO2 atmosphere was most effective among those tested, and retarded increases in phenolics and phenylalanine ammonia lyase activity, but had only slight benefit on visual quality. A 1.25% ascorbic acid +1.25% citric acid treatment was ineffective, but when combined with 3% O2+ 12% CO2, it was comparable with 0.025% sodium bisulphite. Bisulphite concentrations from 0.05% to 0.25% provided similar effective control of discolouration. Bisulphite as low as 0.025% with 3% O2+ 12% CO2 resulted in a visual quality score at the limit of marketability after 8 days at 5 °C. Chemical treatments did not retard increases in phenolic concentrations or phenolic enzyme activities. [source] Does compression affect image retrieval performance?INTERNATIONAL JOURNAL OF IMAGING SYSTEMS AND TECHNOLOGY, Issue 2-3 2008Gerald Schaefer Abstract Image retrieval and image compression are both fields of intensive research. As lossy image compression degrades the visual quality of images and hence changes the actual pixel values of an image, low level image retrieval descriptors which are based on statistical properties of pixel values will change, too. In this article we investigate how image compression affects the performance of low-level colour descriptors. Several image retrieval algorithms are evaluated on a speciated image database compressed at different image quality levels. Extensive experiments reveal that while distribution-based colour descriptors are fairly stable with respect to image compression a drop in retrieval performance can nevertheless be observed for JPEG compressed images. On the other hand, after application of JPEG2000 compression only a negligible performance drop is observed even at high compression ratios. © 2008 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 18, 101,112, 2008 [source] EXTENDING SHELF LIFE OF FRESH-CUT PERSIMMON BY HONEY SOLUTION DIPSJOURNAL OF FOOD PROCESSING AND PRESERVATION, Issue 1 2010MUHARREM ERGUN ABSTRACT Ripe persimmon fruit (Diospyros kaki L) cv. "Hachiya" were diced, then treated with 10,20% w/v diluted honey solution or water as the control, followed by cold storage at 4C until loss of acceptable quality. The persimmon cubes were subject to assessments during the storage of organoleptic and visual quality, softness and exuding juice, soluble solids content (SSC), and absorbance at 436, 440, 675 and 760 nm, respectively. Honey treatments prevented off-aroma development and delayed jelling. Softness and exuding juice of the fresh-cut persimmon cubes increased with time, with the increase in both parameters being significantly suppressed by honey solution dips. Changes in SSC, pH and the absorbance at 436, 440, 675 and 760 nm, respectively, during storage were minor and there was little effect of the honey treatments on these parameters. Overall, the shelf life of fresh-cut persimmon cubes was extended by honey solution dips, which delayed off-aroma development, firmness loss and jelling. PRACTICAL APPLICATIONS New products and changing trends make today's food marketplace alive, and fresh-cut fruits and vegetables seem to be on top of list of these products. Although fresh-cut produce has been on the market for a long time, preserving their quality attributes has not been completely successful especially in the case of fruit. This study focuses on a new alternative fresh-cut produce, fresh-cut persimmon, with adapting a potentially safe organic method, use of honey dips. The present study demonstrated that honey solution dip treatments could preserve the fresh-like quality of typical flavor or aroma of persimmon fruit by causing no changes in aroma and taste attributes and extending shelf life. Therefore, honey dip treatment may be used, depending on commodity, to preserve and extend shelf life of fresh-cut produce in fresh-cut processing industry. [source] Effect of Storage Temperature and Duration on the Behavior of Escherichia coli O157:H7 on Packaged Fresh-Cut Salad Containing Romaine and Iceberg LettuceJOURNAL OF FOOD SCIENCE, Issue 7 2010Yaguang Luo Abstract:, This study investigated the impact of storage temperature and duration on the fate of Escherichia coli O157:H7 on commercially packaged lettuce salads, and on product quality. Fresh-cut Romaine and Iceberg lettuce salads of different commercial brands were obtained from both retail and wholesale stores. The packages were cut open at one end, the lettuce salad inoculated with E. coli O157:H7 via a fine mist spray, and resealed with or without an initial N2 flush to match the original package atmospheric levels. The products were stored at 5 and 12 °C until their labeled "Best If Used By" dates, and the microbial counts and product quality were monitored periodically. The results indicate that storage at 5 °C allowed E. coli O157:H7 to survive, but limited its growth, whereas storage at 12 °C facilitated the proliferation of E. coli O157:H7. There was more than 2.0 log CFU/g increase in E. coli O157:H7 populations on lettuce when held at 12 °C for 3 d, followed by additional growth during the remainder of the storage period. Although there was eventually a significant decline in visual quality of lettuce held at 12 °C, the quality of this lettuce was still fully acceptable when E. coli O157:H7 growth reached a statistically significant level. Therefore, maintaining fresh-cut products at 5 °C or below is critical for reducing the food safety risks as E. coli O157:H7 grows at a rapid, temperature-dependent rate prior to significant quality deterioration. Practical Application:, Specific information regarding the effect of temperature on pathogen growth on leafy greens is needed to develop science-based food safety guidelines and practices by the regulatory agencies and produce industry. Temperature control is commonly thought to promote quality of leafy greens, not safety, based at least partially on a theory that product quality deterioration precedes pathogen growth at elevated temperatures. This prevalent attitude results in temperature abuse incidents being frequently overlooked in the supply chain. This study demonstrates that human pathogens, such as E. coli O157:H7, can grow significantly on commercially packaged lettuce salads while the product's visual quality is fully acceptable. Packaged fresh-cut salads are marketed as "ready-to-eat" while lacking an effective pathogen kill step during their preparation. Thus, maintaining storage temperature at 5 °C or below is critical to prevent pathogen proliferation and mitigate food safety risks should pathogen contamination inadvertently occur during crop growth or postharvest fresh-cut processing. [source] Effect of Sequential Treatment of Warm Water Dip and Low-dose Gamma Irradiation on the Quality of Fresh-cut Green OnionsJOURNAL OF FOOD SCIENCE, Issue 3 2005Hyun Jung Kim ABSTRACT: The effect of warm water dip in combination with irradiation on quality of fresh-cut green onions was studied. Fresh-cut green onions were treated with and without warm water (50°C for 20 s) and packaged prior to irradiation at 0, 0.5, 1.0, and 1.5 kGy, then stored at 4°C for 14 d. Color, texture, decay percentage, electrolyte leakage, sensory qualities, and total aerobic count (TAC) were measured at 1,4,8, and 14 d of storage. The warm water treatment reduced the TAC by 0.9 log initially but the beneficial effect disappeared during storage. With the test conditions used in this study, the warm water treatment did not provide added benefits for quality improvements. Irradiation at all tested doses reduced TAC and the development of decay and off-odor, improved visual quality, and preserved green color. [source] Influence of growth stage and postharvest storage on ascorbic acid and carotenoid content and visual quality of baby spinach (Spinacia oleracea L.)JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE, Issue 11 2007Sara ÅM Bergquist No abstract is available for this article. [source] Influence of growth stage and postharvest storage on ascorbic acid and carotenoid content and visual quality of baby spinach (Spinacia oleracea L.)JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE, Issue 3 2006Sara ÅM Bergquist Abstract To investigate the variations in quality with growth stage and postharvest storage, spinach was sown on three occasions. For each occasion, the spinach was harvested at three growth stages at 6-day intervals. The second stage corresponded to a growth period used for baby spinach by commercial growers. After harvest, the leaves were stored in polypropylene bags at 2 °C or 10 °C. The highest ascorbic acid content in fresh material was found at stage I. During storage, the ascorbic acid content decreased considerably and the dehydroascorbic acid/vitamin C ratio increased. Storage at 2 °C gave a smaller reduction in ascorbic acid content than storage at 10 °C. Total carotenoid content increased or remained stable during storage. Lutein was the major carotenoid, making up about 39% of the total carotenoid content, followed by violaxanthin, ,-carotene and neoxanthin. Visual quality decreased during storage in most cases, and was correlated to initial ascorbic acid and dry matter contents. The initial AA content might therefore be used as a parameter for predicting the shelf-life of baby spinach. The results also indicate that by harvesting baby spinach a few days earlier than the current commercial stage of harvest the postharvest visual quality and nutritional quality may be improved. Copyright © 2005 Society of Chemical Industry [source] A miniscule optimized visual system in the Lower CambrianLETHAIA, Issue 3 2009BRIGITTE SCHOENEMANN Simultaneously with the development of animal body plans, probably before the Precambrian, there was an explosive diversification of visual systems. Competition of performance in these visual systems was a critical factor in the evolution of life systems. Here we analyse the visual system in the lobopod Miraluolishania haikouensis (Liu et al., 2004) from the Lower Cambrian Chengjiang Lagerstätte, Kunming, China. It consists of a very small eye with a miniscule lens. A physical problem lies in the fact that due to the usual refractive conditions of such a lens, it hardly represents an improvement of the visual quality over the basal pit- or pinhole camera eyes. To develop such a lavish visual system, however, would not have been of any value, if it achieved no more than an equal level or represented even a retrograde step in evolutionary progress. We show how this system may have allowed pattern recognition even under poor light conditions. Optimization of such a tiny eye is costly but is not ,a wasted effort' in evolution. In M. haikouensis (Liu et al., 2004), an excellently adapted miniscule visual system has become possible. [source] Environmental fate of metalaxyl and chlorothalonil applied to a bentgrass putting green under southern California climatic conditionsPEST MANAGEMENT SCIENCE (FORMERLY: PESTICIDE SCIENCE), Issue 4 2002L Wu Abstract Putting greens usually receive high inputs of fertilizers and pesticides to meet the high demand for visual quality and to overcome the stress from close mowing and traffic. In this study, two commonly used fungicides, metalaxyl (methyl N -(methoxyacetyl)- N -(2,6-xylyl)- DL -alaninate) and chlorothalonil (2,4,5,6-tetrachloro-1,3-benzenedicarbonitrile), were evaluated for their partitioning and persistence in a bentgrass (Agrostis palustris Huds) putting green under southern California climatic conditions. The putting green site was constructed according to the US Golf Association (USGA) specifications. Lysimeter assemblies installed at the center of each plot were used to monitor the leachate, flux chambers were used to measure volatilization, clippings were collected to determine the residues on grass, and soil cores were sampled to determine residues in the soil profile. Results showed that cumulative volatilization loss accounted for 0.10 and 0.02%, clipping removal 0.11 and 0.13%, and cumulative leaching 0.71 and 0.002% of the applied metalaxyl and chlorothalonil, respectively. The two fungicides were mainly found in the top 10,cm of the soil profile due to the high organic carbon content in the thatch and mat layers. The dissipation half-life was 1.4 days for metalaxyl and 4.9 days for chlorothalonil on grass, shorter than those found in agricultural fields. This study showed that, under normal turf management practices, the offsite transport of the parent fungicides was minimal. Future research should focus on investigating the fate and mobility of the metabolites of the fungicides. © 2002 Society of Chemical Industry [source] A Nonequilibrium, Atmospheric-Pressure Argon Plasma Torch for Deposition of Thin Silicon Dioxide FilmsCHEMICAL VAPOR DEPOSITION, Issue 4 2007P. Kasih Abstract A nonequilibrium, atmospheric-pressure plasma torch that can be generated either in He or Ar gas by using a pulsed high-voltage power supply with the discharge temperature in the range 22,35,°C has been developed. This system is used to deposit silicon dioxide films from a hexamethyldisiloxane (HMDSO) precursor diluted in an oxygen carrier gas. It is concluded that, in terms of both quality and deposition rate at the same applied power, frequency, and gas composition, Ar plasma is more powerful than He plasma for depositing SiO2 -like films. The maximum feed rate of HMDSO/O2 injected into the Ar plasma torch is limited to 100,mL,min,1 to ensure inorganic coatings are deposited. In order to improve the visual quality, without adversely affecting the inorganic features of the film, a small amount of nitrogen (N2) can be added to the Ar as a working gas. When the ratio of Ar to N2 in the flow gas is 30:1, the discharge behavior is transformed from filamentary to glowlike as a result of the quenching effect of admixed N2 on Ar plasma. [source] 3424: Posterior capsule opacification assessment and factors that influence visual quality after posterior capsulotomyACTA OPHTHALMOLOGICA, Issue 2010R MICHAEL Purpose To study the correlation between posterior capsule opacification (PCO) and intraocular straylight and visual acuity. Methods We measured visual acuity (VA) (logMAR) and intraocular straylight (C-Quant straylight parameter log[s]) under photopic conditions before and 2 weeks after YAG capsulotomy in 41 patients (53 eyes) from the Centro de Oftalmología Barraquer in Barcelona and the University Eye Clinic, Paracelsus Medical University in Salzburg. Photopic pupil diameter was also measured. To document the level of opacification, pupils were dilated, and photographs were taken with a slit lamp, using retroillumination and the reflected light of a wide slit beam at an angle of 45º. PCO was subjectively graded on a scale of 0 to 10 and using the POCOman system. A multiple regression analysis was performed to evaluate factors that influence straylight after capsulotomy. Results Straylight correlated well with retroillumination and reflected-light PCO scores, whereas VA only correlated with retroillumination. Both VA and straylight improved after capsulotomy. Straylight values varied widely after capsulotomy. Multiple regression analysis showed that older age, large ocular axial length, hydrophobic acrylic intraocular lenses (IOLs), and small capsulotomies are factors that increased intraocular straylight. Conclusion Intraocular straylight is a useful tool in the assessment of PCO. It correlates well with PCO severity scoring methods. When performing a posterior capsulotomy, factors such as age, IOL material, axial length, and capsulotomy size must be taken into consideration, as they influence intraocular straylight. [source] 4421: The fundamentals of visual acuity measurementACTA OPHTHALMOLOGICA, Issue 2010CM CHISHOLM Purpose To provide the background to the symposium on visual acuity and its measurement Methods The parameters employed to quantify visual performance will be defined. Commonly used measurement techniques ranging from traditional letter charts to psychophysical computer-based programmes, will be described and compared, with reference to the peer-reviewed literature in this area. The issues of accuracy and repeatability will be considered in the context of the clinical setting and scientific studies. Results Letter charts are most commonly employed to assess visual performance because of their ease of use for both the patient and assessor, but they suffer from design limitations. Psychophysical procedures are more flexible and can improve repeatability, but are time consuming and fatigue can start to play a part. Such techniques are generally more suited to the research environment. High contrast visual acuity measurement can give a misleading impression regarding the quality of vision. This is particularly the case for subjects with impaired optical quality relating to an increase in intraocular light scatter and/or increased higher order aberrations. Assessment in the contrast domain is essential to build up a fuller picture. Conclusion The assessment of visual quality requires an understanding of test design and limitations. The method used should be chosen to suit the aims of the work and partly depends on whether it is taking place in a clinical practice setting or as part of a research study. [source] 4245: Non-surgical strategies for PCO preventionACTA OPHTHALMOLOGICA, Issue 2010IM WORMSTONE Purpose Surgical approaches and IOL design have gone some way to reduce the rate of PCO progression. Despite these efforts PCO remains a common and important problem which diminishes the visual quality of patients and is a major financial burden on healthcare providers. If we are to effectively respond to the problem of PCO then a biological solution has to be adopted to reduce/prevent formation of light scattering changes. Methods Methods have been employed to investigate PCO development, which include in vitro cell culture and capsular bag models; in vivo animal models and post-mortem analysis. These have greatly aided our understanding of PCO. Results A number of basic approaches have been identified to prevent PCO. 1) To kill the entire lens epithelial population. This will require a pharmacological agent, therefore delivery of this drug needs to be localised to the target cells, but have limited access to non-target cells; closed capsular bag systems such as perfect capsule provides opportunity to achieve this aim. 2) Maintenance of a cell monolayer on the posterior capsule. In particular the role of TGF, has been investigated, which is known to cause matrix deformation. Disruption of TGF, signalling pathways can suppress matrix deformation and thus reduce light scatter. 3) Recreation of a lens is the ultimate solution. While it has been shown that lens fibre differentiation can be promoted in animal systems, perfect formation of the lens is not achieved and the protein density is typically low relative to the native lens. Conclusion Strategies to prevent PCO are being actively developed, which will are greatly aided by improved drug delivery systems. The development of biological/pharmacological approaches in concert with improved surgical methods and IOL designs should yield benefit to patients. Commercial interest [source] Association of lens opacities, intraocular straylight, contrast sensitivity and visual acuity in European driversACTA OPHTHALMOLOGICA, Issue 6 2009Ralph Michael Abstract. Purpose:, To study the relationship between lens opacity and intraocular straylight, visual acuity and contrast sensitivity. Methods:, We investigated 2422 drivers in five clinics in different European Union (EU) member states aged between 20 and 89 years as part of a European study into the prevalence of visual function disorders in drivers. We measured visual acuity [Early Treatment Diabetic Retinopathy Study (ETDRS) chart], contrast sensitivity (Pelli,Robson chart) and intraocular straylight (computerized straylight meter). Lens opacities were graded with the Lens Opacities Classification System III (LOCS) without pupillary dilation. Participants answered the National Eye Institute Visual Functioning Questionnaire , 25. Results:, Intraocular straylight was related more strongly to LOCS score than to both visual acuity and contrast sensitivity. Visual acuity and contrast sensitivity were correlated to each other well, but to intraocular straylight to a much lesser extent. Self-reported visual quality was best related to contrast sensitivity; night driving difficulty was best related to visual acuity. Conclusion:, Straylight is found to have added value for visual function assessment in drivers, whereas if visual acuity is known contrast sensitivity has limited added value. [source] | |||||||||||||