hemifield

hemifield

One half of the visual field, usually divided vertically through the fovea into the left or the right visual field. It occurs following transection of the optic chiasma. Hemifield neglect sometimes occurs following trauma to the posterior lobe of one hemisphere. See visual neglect.
References in periodicals archive ?
36-38) One study calculated a 'signal/noise' ratio (a ratio of hemifield differences in total deviation to between-test variability) for both FDT2 (the second generation of FDT instruments) and SAP.
Rather, there are independent limits in the left and right regions of visual space: tracking additional targets in one visual hemifield has little to no effect on tracking performance in the other (G.
Only 5% said the aura clearly began in one hemifield of the vision.
The six questions ask about the sudden onset of painless hemibody weakness, painless hemibody numbness, difficulty understanding, difficulty speaking, loss of vision in one or both eyes, and loss of hemifield vision.
These three structures showed a predominance of activation on the left over the right hemisphere only when faces were presented in the left hemifield.
After completion of the two-year follow-up questionnaire, 68% of the subjects were generally satisfied with the prisms, and three out of seven subjects with hemifield losses were driving.
For this purpose we have developed hemifield goggles which fit over corrective lenses if necessary.
This means damage to one eye wouldn't remove an entire hemifield of vision as depicted by Scotoma 1 (see Figure 1).
For example, a wide variety of criteria are used when interpreting the results from visual field data obtained from SAP, ranging from simple global metrics, such as mean deviation (MD), to more local analyses, such as the glaucoma hemifield test (GHT).
The most effective detection criteria for glaucomatous visual field loss are localised loss for individual points, hemifield clusters, or asymmetrical sensitivity across the horizontal meridian.
Humphrey visual field analysis confirmed the prominent temporal hemifield loss in the right eye, and inferior altitudinal field loss in the left eye (Figure 1).
It is likely to extend across the entire superior hemifield