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Abstract #5655 Published in IGR 2-1
Study of the contralateral eye in patients with glaucoma and a unilateral perimetric defect
Susanna R Jr; Galvao-Filho RPJournal of Glaucoma 2000; 9:34-37
PURPOSE: To study the unaffected fellow eye in patients with glaucoma and unilateral visual field defect, using conventional automated achromatic perimetry, blue-yellow short-wavelength automated perimetry (SWAP), and a nerve fiber layer analyzer (GDx; Laser Diagnostic Technologies, San Diego, CA). METHODS: Eighteen patients in whom a unilateral visual field defect was detected on conventional computerized threshold perimetry were selected. The contralateral eyes of these patients were studied with normal conventional threshold perimetry using blue-yellow perimetry and were also studied with the nerve fiber layer analyzer. Also, 18 eyes of 18 sex- and age- (±3 years) matched persons without glaucoma were selected as a control group. RESULTS: Of the 18 contralateral eyes, seven (38.8%) showed a visual field defect on blue-yellow conventional perimetry, and ten (55.5%) showed a defect of the nerve fiber layer when evaluated with the nerve fiber analyzer. Of the ten eyes with abnormal visual fields on the nerve fiber analyzer, six (60.0%) also showed a defect on blue-yellow perimetry. In the control group, no eyes showed visual field defect on SWAP, but three eyes (16.6% false positive rate) showed a visual field defect on the nerve fiber layer analyzer. CONCLUSIONS: These findings suggest that what appeared to be unilateral visual field defects may in fact have been bilateral in at least 33.3% of the authors' patients (n=6) for whom there was agreement between results of SWAP and the nerve fiber layer analyzer.
Dr. R. Susanna Jr, Department of Ophthalmology, University of Sao Paulo, SP, Brazil
Classification:
6.6.2 Automated (Part of: 6 Clinical examination methods > 6.6 Visual field examination and other visual function tests)
6.6.3 Special methods (e.g. color, contrast, SWAP etc.) (Part of: 6 Clinical examination methods > 6.6 Visual field examination and other visual function tests)
6.9.1 Laser scanning (Part of: 6 Clinical examination methods > 6.9 Computerized image analysis)
