Observations A 40-year-old male with history of a ruptured arteriovenous malformation at age 10 years, treated with embolization therapy, was referred to the neuro-ophthalmology clinic for evaluation of right h
Perimetryby the standard kinetic Goldmann technique using an Armaly-Drance testing strategy detects visual defects when about 30% of the fibers are lost.Static perimetry is an even more sensitive method and has become the visual field examination of choice.Tangent screenmeasurement of the blind sp...
Meanwhile, the visual field can still show progression because it has more dynamic range remaining at the low end.” “The OCT RNFL measurement may lose its usefulness sooner than visual field testing does,” agrees Dr. Chen. “Because of glial scar tissue or other nonfunctional structural ...
Common visual symptoms reported in AD comprise diminished color contrast sensitivity17, visual field defects18, delayed saccadic eye movements and slow pursuit movements19, complex visual deficits such as poor understanding of written words (impairing reading abilities)20, difficulties in object and shape...
Discover information about special eye tests including Corneal Topography, IOLMaster Testing, OCT Testing, OCT Angiography, Visual Field Testing, and Wavefront Analysis.Read more… Refractive Lensectomy Today, many people choose to correct their refractive errors with techniques other than wearing eyeglas...
Traditionally, field surveys have relied on manual visual data analysis, a time-consuming and labor- intensive process that limits the scope of research. Although image processing techniques have been developed for mass analysis, they have predomi- nantly focused on basic features such as color ...
Neuropsychopharmacology (2003) 28, 2179–2183, advance online publication, 8 October 2003; doi:10.1038/sj.npp.1300285 Keywords: depression; elderly; prefrontal cortex; orbital frontal cortex; memory; neuropsychological testing; magnetic resonance imaging INTRODUCTION The prefrontal cortex (PFC) is one ...
The majority of eyes with DON develop a central or paracentral scotoma and peripheral breakout patterns [3, 7]; thus, visual field testing, such as SAP, could accurately detect this disease. VEPs are signals obtained from electroencephalo- graphic activities [8] and can examine the functional ...
residual macular and paramacular function. We record PVEPs with both eyes open before monocular testing. We use a transoccipital array of electrodes, large full field (30°) and, where possible, half-field stimulation, to discriminate optic nerve, chiasmal, and hemisphere anomalies (Fig. 8.4)....
A. Population receptive field estimates in human visual cortex. NeuroImage 39, 647–660 (2008). 12. Wandell, B. A., Dumoulin, S. O. & Brewer, A. A. Visual field maps in human cortex. Neuron 56, 366–383 (2007). 13. Zeki, S. M. Representation of central visual fields in pre...