A Case of Functional Bitemporal Hemianopia Respecting the Vertical Meridian.

Han, Sang Beom; Hwang, Jeong Min

doi:2009.50.6.957

J Korean Ophthalmol Soc > Volume 50(6); 2009 > Article

Case Report

Journal of the Korean Ophthalmological Society 2009;50(6):957-962.
DOI: https://doi.org/10.3341/jkos.2009.50.6.957 Published online June 15, 2009.

A Case of Functional Bitemporal Hemianopia Respecting the Vertical Meridian.

Sang Beom Han, Jeong Min Hwang

¹Department of Ophthalmology, Seoul National University School of Medicine, Seoul, Korea. hjm@snu.ac.kr
²Department of Ophthalmology, Seoul National University Bundang Hospital, Seongnam, Korea.

수직경선을 가로지르는 양안 기능성 이측반맹 1예

한상범^1,2ㆍ황정민^1,2

Department of Ophthalmology, Seoul National University School of Medicine¹, Seoul, Korea / Department of Ophthalmology, Seoul National University Bundang Hospital², Seongnam, Korea

Abstract

PURPOSE
To report a case of functional bilateral hemianopia which was not associated with any organic causes. CASE SUMMARY: A 35-year-old female patient presented with bilateral disturbance of visual acuity and visual field, which had begun 8 months prior. Goldmann perimetry showed bitemporal hemianopsia respecting the vertical meridian. Pupillary response was normal, and the anterior segment, fundus, and optic nerve were also normal bilaterally. However, the tangent screen test and Humphrey visual field test showed a widening of hemianopia not respecting the vertical meridian, and the crossing of isopters at 1 m and 2 m with the tangent screen test. In addition, multifocal electroretinogram and multifocal visual evoked potential did not reveal any abnormal findings corresponding to the bitemporal hemianopia. Brain magnetic resonance imaging showed no abnormal findings in the orbit and brain. CONCLUSIONS: Bitemporal hemianopsia can be developed functionally, although it may be rare. Repetition of various visual field tests and use of multifocal electrophysiologic studies can be helpful in the differential diagnosis.

Key Words: Bitemproal hemianopia;Functional visual field defect;Multifocal electrophysiologic study