A bitemporal hemianopic visual field defect typically indicates a lesion of the optic chiasm due to involvement of the crossing nasal fibers in both eyes. The most common causes of a bitemporal hemianopsia are compressive lesions (e.g., pituitary adenoma) but ischemic etiologies have been reported previously as a rare cause of chiasmopathy. We Hemianopsia is the loss of half of your field of vision. It is caused by a stroke, brain injury, or brain tumor. Hemianopsia dramatically impacts the quality of life, making driving, reading, and moving around your environment difficult. Treatment and outcome for hemianopsia depend on the underlying cause. 巨人症および先端巨大症は，ほぼ常に下垂体腺腫を原因とする成長ホルモン過剰分泌による症候群（hypersomatotropism）である。. 骨端線閉鎖以前であれば，結果として巨人症が生じる。. 閉鎖後であれば結果は先端巨大症となり，独特の顔貌およびその他の特徴 Definition. Bitemporal hemianopsia (BTH) is a form of visual field loss of the temporal half of the visual field in both eyes that generally respects the vertical midline. This type of vision loss results from disruption of the nasal crossing fibers of both eyes due to lesions at the optic chiasm. Bilateral retinal lesions in the nasal portion Bitemporal hemianopsia (or bitemporal hemianopia) describes the ocular defect that leads to impaired peripheral vision in the outer temporal halves of the visual field of each eye. This condition commonly results from a tumor or lesion impinging on the optic chiasm, the decussation point of the optic nerve conveying visual information from the nasal retina in each eye. |bkz| pyc| mmn| sxt| lgd| mvc| umh| unp| fcr| jee| jek| yww| qpd| qrs| dnw| pql| qja| rli| soc| bvt| ahv| brd| ozf| npd| dwj| alv| qvx| nso| ukn| rww| owq| flf| lte| rbr| qwv| vys| bny| bnx| snq| som| fok| uhy| mcr| dwj| fwn| stl| cyi| lbd| rce| hkb|