Insidious homonymous quadrantic visual field defect revealed after a sudden bilateral loss of vision: Report of two cases
Küçük Resim Yok
Tarih
2001
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Objective: To report two patients with sudden transient complete loss of vision in their both eyes because of cortical blindness and to emphasize the importance of close monitoring with computerized tomography (CT), magnetic resonance imaging (MRI) and perimetry. Materials and Methods: Complete ophthalmologic and neurological examinations were performed in two patients with sudden bilateral loss of vision. Perimetry, CT and MRI were carried out in both patients and the clinical significance was discussed. Results: After recovery from complete visual loss, one patient (40-years old woman) showed congruous right-side superior homonymous quadrantanopsia because of the pre-existed infarction in the left side. The quadrantanopia was accompanied by increased T2-weighted contrast intensity of bilateral regions in the occipital cortex. The second patient (28-years old woman) showed right-side superior homonymous quadrantanopia because of the subacute infarction with increased T2-weighted contrast intensity of the left parahypocampal area reaching parietoccipital sulcus. Not the sudden transient visual loss lasting 2 hours as a consequent of cortical blindness, but interestingly quadrantic right superior visual field defects were the main complaints of the patients on admission. Conclusion: Both cases are of interest because of unrecognized pre-existed quadrantanopia was present and unilateral aforementioned lesions were noticed by physicians only after sudden complete but transient bilateral loss of visions (cortical blindness). We suggest that all patients complaining transient bilateral sudden visual loss should be evaluated more carefully and have perimetry even neurological examination reveals normal results.
Açıklama
Anahtar Kelimeler
Cortical blindness, CT, MRI, Perimetry, Quadrantanopia
Kaynak
International Medical Journal
WoS Q Değeri
Scopus Q Değeri
N/A
Cilt
8
Sayı
2
