Search results
Results from the WOW.Com Content Network
Thus, if there is a question of papilledema on fundoscopic examination or if the optic disc cannot be adequately visualized, ultrasound can be used to rapidly assess for increased intracranial pressure and help direct further evaluation and intervention. Unilateral papilledema can suggest a disease in the eye itself, such as an optic nerve glioma.
Visual field-bitemporal hemianopia Visual field-binasal hemianopia. A lesion involving complete optic chiasm, which disrupts the axons from the nasal field of both eyes, causes loss of vision of the right half of the right visual field and the left half of the left visual field. [3] This visual field defect is called as bitemporal hemianopia.
Peripheral vision is usually spared since the pattern of loss typically involves a central or cecocentral scotoma, a visual field defect at or surrounding the point of fixation. This pattern can be revealed via visual field testing. Upon examination, the pupils usually demonstrate a normal response to light and near stimulation. In those who ...
Lesions in the pathway cause a variety of visual field defects. The type of field defect can help localize where the lesion is located (see figure). A lesion in the optic nerve of one eye causes partial or complete loss of vision in the same eye, with an intact field of vision in other eye.
disc edema in the contralateral eye; central scotoma (loss of vision in the middle of the visual fields) in the ipsilateral eye; The presence of anosmia (loss of smell) ipsilateral to the eye demonstrating optic atrophy was historically associated with this syndrome, but is now understood to not strictly be associated with all cases. [4]
For those with visual field defects optical coherence tomography has been recommended for follow-up of nerve fiber layer thickness. [12] Associated conditions such as angioid streaks and retinitis pigmentosa should be screened for. Both the severity of optic disc drusen and the degree of intraocular pressure elevation have been associated with ...
The visual field of each eye can be divided in two vertically, with the outer half being described as temporal, and the inner half being described as nasal. "Bitemporal hemianopsia" can be broken down as follows: bi-: involves both left and right visual fields; temporal: involves the temporal visual field; hemi-: involves half of each visual field
Visual acuity often remains stable and poor (around or below 20/200) with a residual central visual field defect. Patients with the 14484/ND6 mutation are most likely to have visual recovery. [8] Dominant optic atrophy is an autosomal dominant disease caused by a defect in the nuclear gene OPA1. A slowly progressive optic neuropathy, dominant ...