advertisement
Abstract #45791 Published in IGR 13-2
Idiopathic acquired temporal sectoral visual field defects
Fraser C; Pellanda N; Plant GTNeuro-Ophthalmology 2011; 35: 19
AIM: To report 4 cases of acquired idiopathic temporal sectoral visual field defects. BACKGROUND: Wedge-shaped temporal defects have been reported in 5 cases of presumed congenital nasal hypoplasia of the optic disc, of which 4 were incidental findings.(1,2) We can find no report of a similar defect occurring in anterior ischaemic optic neuropathy (AION) but the nasal sector of the optic disc is vulnerable to operative trauma and non-progressive defects are reported post retinal surgery(3), and post radial optic neurotomy.(4) Progressive defects in the temporal region are seen in a minority of glaucoma patients. (5) METHOD AND MATERIALS: Four patients, with ages ranging from 36 to 47, presenting with apparent subacute onset of monocular temporal visual field loss underwent electrodiagnostic tests and were followed over several years with visual fields and optical coherence tomography (OCT). In all cases field defect remained stable. One patient developed a similar defect in the fellow eye after an interval of 5 years. RESULTS: Visual field testing with Goldmann and Humphrey perimetry showed a defect extending temporally from or contiguous with the blind spot. There was no evidence for optic disc drusen, glaucoma, hypoplasia of the disc or focal retinitis. Sectoral disc swelling (which would have been suggestive of an unusual focal anterior ischaemic optic neuropathy) was not seen in any patient at presentation. CONCLUSIONS: We describe unusual acquired temporal sectoral defects, likely to have resulted from damage to the nasal rim of the optic disc.
C. Fraser. Neuro-Ophthalmology, Moorfields Eye Hospital, National Hospital for Neurology and Neurosurgery, London, United Kingdom.
Classification:
10 Differential diagnosis e.g. anterior and posterior ischemic optic neuropathy
6.6.2 Automated (Part of: 6 Clinical examination methods > 6.6 Visual field examination and other visual function tests)
