J-F Legargasson

Learn More
Confocal scanning laser ophthalmoscopy (CSLO) is a new technique that enables ocular fundus image recording and retinal dynamic angiography to be performed. The ocular fundus image is acquired sequentially, point by point, and is reconstructed on a video monitor at the rate of 25 images per second. The feasibility of performing both ocular fundus image(More)
OBJECTIVE The perception of visual verticality is often perturbed after stroke and might be an underlying component of imbalance. The aim of this study was to describe the evolution of visual vertical (VV) perturbation and to investigate the factors affecting it. METHODS Thirty patients with hemiplegia after a single hemispheric stroke (17 left lesioned(More)
The visual cortex may reorganize after occurrence of a scotoma. Different experimental studies have shown that there is an attempt to minimize the impact of the scotoma, the missing information being filled-in by surrounding information. The clinical consequences of this filling-in phenomenon have been extensively studied by Safran and co-workers. The(More)
PURPOSE To evaluate the effects of levothyroxine (LTh) on the electroretinogram (ERG) of adult dogs. MATERIAL AND METHODS Binocular, full field photopic and scotopic ERGs were recorded from an anesthetized Maltese Bichon cross (MB), a Yorkshire Terrier (YT) and a Shetland Sheepdog (SS) affected with hypothyroidism and treated with a daily dose of LTh at(More)
PURPOSE Patients with central scotoma often develop eccentric fixation on a preferred retinal locus (PRL). Identifying the PRL is one of the first steps in low vision rehabilitation training. We present our evaluation of a simple test designed to locate the eccentric fixation in eyes with central scotoma. METHODS This was a prospective case series of(More)
The software we have developed originated after careful study of a routine functional visual processing session. It has three objectives: (i) to have available a large library of data processing programs; (ii) to add to these electrophysiological results, automatically transferred into a file, a clinical record card, creating a personalized file for study(More)
After introducing physical and physiological stimulation parameters, the authors present different techniques and discuss their clinical usefulness for the investigation of the visual system: flashes: chiefly 'ganzfeld' stimulators (whole field or local stimulation). A solution using optic fibres incorporated in a sclero-corneal electrode built in our(More)
Among the different means to adapt to central scotoma is eccentric fixation in several zones, the most documented and best-known phenomenon. After anatomic destruction of the macula, one area of the perifoveal retina may become the new oculomotor reference. This area is referred to as the preferred retinal locus (PRL). Scanning laser ophthalmoscopy greatly(More)