Visual field assessment is important in the evaluation of lesions involving the visual pathways and should be performed at baseline and periodically in the follow-up. Standard automated perimetry has been shown to be adequate in neuro-ophthalmic practise and is now the technique of choice for a majority of practitioners. Goldman kinetic visual fields are useful for patients with severe visual a...

To cite: Wong SH, Plant GT. Pract Neurol 2015;15: 374–38

PURPOSE. To determine whether retinal vessel oxygen saturation is affected in primary open-angle glaucoma (POAG) patients. METHODS. Retinal oxygen saturation in patients with POAG was measured in retinal vessels with a spectrophotometric retinal oximeter in darkness, and visual fields were obtained. Oxygen tension (Po(2)) was calculated from oxygen saturation values. Statistical analysis was pe...

Subjects were tested for their ability to match words sequentially presented to the same visual field and to different visual fields. When the match was made between visual fields the error rate was significantly greater than when the match was made within fields. The combining of information from both visual fields requires its transmission across the corpus callosum, and the possibility that ...

An integrated system to evaluate the magnetic field generated by power lines exposure has been developed using a specific simulation model (PLEIA-EMF). This is part of a software toolset, subjected to internal suitability verifications and in-field validations. A state indicator related to each span has been determined using the data extracted from digital cartography, the magnetic field calcul...

The literature on biological effects of magnetic and electromagnetic fields commonly utilized in magnetic resonance imaging systems is surveyed here. After an introduction on the basic principles of magnetic resonance imaging and the electric and magnetic properties of biological tissues, the basic phenomena to understand the bio-effects are described in classical terms. Values of field strengt...

this study was intended to investigate the visual field status and its association with other visual parameters in adolescent boys and to compare these outcomes to hearing ones. in a cross-sectional study, visual fields (vf) of 64 adolescent boys with hearing impairments and 68 age-matched boys with normal hearing were evaluated among high school students of tehran, iran in 2013. they all had i...

seven cases of visual field defects, caused by wartrauma were seen at farabi eye hospital. none were referred by a neurologist. four patients had 20/20 visions with normal fundi. one had 12/20, in both eyes, with normal fundi. two patients presented fundus changes. the visual field defects were seen in all these seven patients. four had homonymous hemianopia, one had bilateral field restriction...