• This simple, precise target ends the need for "flip" cross cylinder testing, and permits direct prescription for astigmatism (out of focus vision frequently associated with near or farsightedness). (keystoneview.com)
  • Macropsia is related to other conditions dealing with visual perception, such as aniseikonia and Alice in Wonderland Syndrome (AIWS, also known as Todd's syndrome). (wikipedia.org)
  • Purpose: Dynamic visual acuity (DVA), the ability to resolve fine details of a moving target, requires spatial resolution and accurate oculomotor control. (uwaterloo.ca)
  • By contrast, anisophoria can more or less been determined from the prescription and is a parameter that needs to be kept within bounds when correcting the aniseikonia. (opticaldiagnostics.com)
  • Other barriers for a select population with high anisometropic or ametropic amblyopia include rejection of glasses for various reasons including discomfort, behavioural or sensory problems, postural issues and visually significant aniseikonia. (bmj.com)
  • Any attempt to eliminate aniseikonia in amblyopes should consider their asymmetric responses under black and white backgrounds. (arvojournals.org)
  • For example, a measured aniseikonia of -5% means that the image is in the right eye is perceived as approximately 5% larger than the image in the left eye and that therefore the aniseikonia is corrected by minifying the image in the right eye by 5% (or magnifying the image in the left eye by approximately 5%, or a combination of both). (opticaldiagnostics.com)
  • It has previously been shown that a target on a black background can appear larger than one on a white background (Kremkow, PNAS, 2014). (arvojournals.org)
  • The person should notice that the target appears larger to the eye that it is directly in front of. (wikipedia.org)