BACKGROUND Vestibular patients occasionally report aggravation or triggering of their symptoms by visual stimuli, which is called visual vestibular mismatch (VVM). These patients therefore experience discomfort, disorientation, dizziness and postural unsteadiness. OBJECTIVE Firstly, we aimed to get a better insight in the underlying mechanism of VVM by examining perceptual and postural sympto...

Optometry & Vision Development ABSTRACT Background: Sensory integration problems are frequently found in individuals with Autism Spectrum Disorders (ASD). In particular, vision is often affected with visual symptoms being pervasive and severe. These visual symptoms are due to an individual’s unique sensory-processing abilities and are biologically based in origin. Review: Ninety-six publication...

objective: the relationship between obsessive compulsive disorder and schizophrenia has been a matter of dispute for ages. this study aimed to investigate the differences between schizophrenia with obsessive compulsive symptoms (ocs) and schizophrenia without ocs in affecting positive and negative symptoms of schizophrenia.  methods: study participants comprised 30 patients with schizophrenia w...

Introduction and aims The use of 'poppers' (volatile alkyl nitrites) has been associated with the development of visual symptoms secondary to the development of maculopathy. There are currently no data regarding the prevalence of this condition among poppers users. The aim of this study was to quantify the presence of visual symptoms among poppers users from a global cohort. Design and method...

We report a patient who has had persistent visual disturbances since she underwent catheter ablation to treat her Wolff-Parkinson-White (WPW) syndrome. We examined her visual symptoms carefully and quantitatively by means of our newly developed method combining image-processing and psychophysics. We first simulated the patient's visual symptoms using image-processing techniques. Since the simul...

BACKGROUND Vision loss from glaucoma has traditionally been described as loss of "peripheral vision." In this prospective study, we aimed to improve our clinical understanding of the visual symptoms caused by glaucoma by asking patients specific detailed questions about how they see. METHODS Patients who were clinically diagnosed with various types and stages of glaucoma were included. All ha...

some studies have already addressed the effects of occupational organic solvent exposure on the visually evoked potentials (veps). visual system is an important target for sulphur mustard (sm) toxicity. a number of iranian victims of sulphur mustard (sm) agent were apprehensive about the delay effect of sm on their vision and a possible delay effect of sm on their visual cortex. this investigat...

Neuro-otological and posturography findings in 15 patients with visually induced vertiginous symptoms (visual vertigo) are reported. Thirteen patients were considered to have a peripheral vestibular disorder; seven had abnormal caloric or rotational test results. Two patients had CNS disorder--a cerebellar degeneration and a brainstem stroke. Posturography testing showed that five patients show...

Carriers of the rare 22q11.2 microdeletion present with a high percentage of positive and negative symptoms and a high genetic risk for schizophrenia. Visual processing impairments have been characterized in schizophrenia, but less so in 22q11.2 Deletion Syndrome (DS). Here, we focus on visual processing using high-density EEG and source imaging in 22q11.2DS participants (N = 25) and healthy co...