Binasal hemianopia.
نویسندگان
چکیده
Three patients with nasal visual field defects are described. In each case it is believed that compression of the lateral fibres of the optic nerve by the anterior cerebral or internal carotid artery was the cause. Binasal hemianopia can thus be produced by a single lesion and is as much a true hemianopia as the common bitemporal one. The value of careful neuroradiological investigation to display the relationships of a tumour to the chiasma, optic nerves, and related vessels and thus explain the field defects is demonstrated.
منابع مشابه
Complete binasal hemianopia.
Binasal hemianopia is a rarely encountered visual field defect. We examined two asymptomatic female patients, aged 17 and 83, with complete binasal hemianopia. Both patients had unremarkable eye exams except for the visual field deficits and minimally reduced visual acuity and color vision. Both patients had normal neuroimaging. These are the first reported cases of complete binasal visual fiel...
متن کاملFunctional Magnetic Resonance in Binasal Hemianopia
The authors report a case of binasal hemianopia in a 34-year-old female who, at the age of 22 years, underwent resection of a pinealoma located at the 3rd ventricle. Less than a year after the surgery, partial visual field losses occurred. Examination of retina, retinal nerve fiber layer (RNFL) as well as examination of the ganglion cell complex (GCC) excluded a pregeniculate lesion. Functional...
متن کاملNeurological Hemifield Test in Binasal Defects.
We read with great interest the paper by McCoy et al. validating the neurological hemifield test (NHT) to detect and classify visual field loss caused by chiasmal or postchiasmal lesions. In this paper, more than 60% of glaucoma eyes misclassified as neurological according to the NHT score criterion had binasal defects. Therefore, interpreting binasal hemianopia is a particular challenge. To em...
متن کاملVolume perimetry: measurement in depth of visual field loss.
PURPOSE Volume scotomas are three-dimensional regions of space that are not visible to the observer. Volume perimetry maps volume scotomas. Volume scotomas predicted from combining monocular visual fields assume known fixation locus (mainly foveal). However, fixation loci are not always known, especially with central field loss (CFL). Here we demonstrate methods for measuring and calculating vo...
متن کاملThe anatomy of the optic chiasma and heteronymous hemianopia.
The gross anatomy of the optic nerves and chiasma has been studied, and differences in the tension in the crossed and uncrossed fibres after chiasmal displacement have been investigated. The anterior and posterior attachments of the medial and lateral fibres of the nerves have been studied. The chiasma has been dissected under low power microscopy and a three dimensional picture of it developed...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of neurology, neurosurgery, and psychiatry
دوره 36 5 شماره
صفحات -
تاریخ انتشار 1973