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  • results
  • The new rules outlined clear for not only which visual field testing method was to be used, but also how the results should be interpreted and assessed, and guidelines for doctors to report drivers not fulfilling the requirements. (biomedcentral.com)
  • binocular
  • The purpose of this study was to compare the monocular Humphrey Visual Field (HVF) with the binocular Humphrey Esterman Visual Field (HEVF) for determining whether subjects suffering from glaucoma fulfilled the new medical requirements for possession of a Swedish driver's license. (biomedcentral.com)
  • During binocular viewing, each location in the right monocular field has a corresponding point in the left monocular field and vice versa. (biomedcentral.com)
  • Disadvantages of this technique are that it is not possible to judge whether the defect is absolute or relative, and there is no way to control fixation stability since the binocular testing conditions eliminate naturally occurring blind spots which are used for fixation control in other tests. (biomedcentral.com)
  • vision
  • There is a long list of eye diseases and conditions affecting the field of vision, among them glaucoma. (biomedcentral.com)
  • a limited field of vision hinders the driver's capability of not only detecting objects in the periphery, but also judging distances and speed. (biomedcentral.com)
  • Methods
  • Methods: An interactive test consisting of 36 locations and two stimulus contrasts (162 cd/m2 and 190 cd/m2 on a background of 140 cd/m2) was evaluated in 54 healthy subjects and 50 primary glaucoma patients. (eur.nl)
  • These fields were then judged within normal limits by several traditional methods. (arvojournals.org)
  • Several machine learning classifiers representing different methods of supervised learning and reasoning 2 performed well in classifying the visual fields, in comparison to both Statpac 2 (Carl Zeiss Meditec, Dublin, CA) indices 3 4 and a glaucoma expert (EZB). (arvojournals.org)
  • fixation
  • Visual field test result normal - 3/14 fixation error. (healthtap.com)
  • Alteration of a fixation or peripheral stimulus displayed on a computer-driven display allows a human subject to maintain extended visual fixation upon the resulting dynamic stimulus. (google.com.au)
  • The fixation is presented upon the display and the stimulus is altered to allow resensitization of the subject's retina, thereby allowing prolonged visual fixation upon the resulting dynamic target. (google.com.au)
  • SAP requires observers to maintain fixation whilst attending to small dim lights for the duration of the test. (arvojournals.org)
  • Disadvantages of this technique are that it is not possible to judge whether the defect is absolute or relative, and there is no way to control fixation stability since the binocular testing conditions eliminate naturally occurring blind spots which are used for fixation control in other tests. (biomedcentral.com)
  • sensitivity
  • The coefficient of determination (r2) for the correlation between visual sensitivity and the GCL+IPL thickness was calculated for each test at eccentricities 0 to 5 degrees, 5 to 7 degrees, and 7 to 10 degrees using linear and quadratic regressions. (ovid.com)
  • Output measures included number of presentations and visual sensitivity estimates. (arvojournals.org)
  • There was no significant difference in accuracy or precision of SWeLZ for the different spatial models relative to ZEST, either when collated across whole fields or when split by input sensitivity. (arvojournals.org)
  • Using the Zippy Estimation by Sequential Testing (ZEST) algorithm engineered for multiple locations has a similar test time to SITA, with improved accuracy and precision of visual sensitivity estimates. (arvojournals.org)
  • occipital
  • You have described a typical pattern for occipital migraine , a condition affecting the circulation to the occipital lobe - the visual information processing part of the brain. (healthtap.com)
  • Retinal dystrophies such as retinitis pigmentosa, degenerative conditions such as advanced stage glaucoma , vascular conditions such as occipital stroke , and post traumatic conditions such as traumatic optic neuropathy all can constrict visual fields. (healthtap.com)
  • stimulus
  • Each stimulus location with an AUC less than 0.75 along with its mirrored test location around the horizontal axis were eliminated from the grid. (eur.nl)
  • Reaction time (RT) was tested by presenting 12 designated RT-vectors between 10° and 20° within the seeing areas for the III/4e isopter (stimulus velocity, 3°/second). (arvojournals.org)
  • detectable
  • 6 . A method in accordance with claim 4 , wherein the tuning includes increasing the spatial frequency of the grating until the illusion is not properly detected by the subject and then maintaining the spatial frequency at a level that is detectable by the subject, yet near the limit of the spatial resolution of the subject's central visual field. (google.com.au)