Volume : V, Issue : I, January - 2016

VISUAL FIELD DEFECTS IN OCCIPITAL LOBE LESIONS

Dr Rajesh R Nayak, Dr Garud Ajita Prakash, Dr Sumana J Kamath

Abstract :

Introduction: Damage to occipital lobe results in homonymous visual field defects that continue to respect the vertical midline. Purpose: To describe various types of visual field defects seen in occipital lobe lesions and to do a clinic–anatomical correlation of these visual field defects with neuroimaging. Study design: Prospective cross sectional study Methods: All patients detected of occipital lobe lesions on neuroimaging and having hemianopias on visual field as obtained by 30–2 program on the Humphrey field analyzer with a white on white Goldmann Size III target are included and the reliability criteria used will be fixation losses less than 20%, false positive and false negative errors less than 33%.. Rsults: Total 16 patients with occipital lobe lesions detected on neuroimaging were studied. A total of 11 Homonymous hemianopia(68.75%) were complete and 5 HH (31.25%) were incomplete. Homonymous hemianopia with macular spå (4 HH, 25%) was the most common type of incomplete HH, followed by HH Quadrantanopia(1 HH, 6.25%). Causes of HH included stroke (7 HH, 43.75%), trauma (3, 18.75%), tumor (2, 12.5%), intracranial surgeries(2, 12.5%), meningo–encephalitis (1,6.25%).Conclusion: Causes of Occipital lobe lesions includes stroke, head injury, ain tumours, intracranial surgeries, meningo–encephalitis. These field defects affect a variety of cognitive visual functions. Prognosis of visual field defect is highly variable and depends on cause and severity of ain lesion.

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Article: Download PDF   DOI : 10.36106/ijsr  

Cite This Article:

Dr Rajesh R Nayak, Dr Garud Ajita Prakash, Dr Sumana J Kamath Visual Field Defects in Occipital Lobe Lesions International Journal of Scientific Research, Vol : 5, Issue : 1 January 2016

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