Abstract:
:The Amsler grid is a suprathreshold target and thus may fail to detect relative scotomas. If the grid is viewed through two cross-polarizing filters creating low luminance conditions (threshold Amsler grid testing) the test is far more sensitive. Ten patients with disorders of the macula with normal standard white Amsler grid testing were studied with three other Amsler grid tests. Of the 15 involved eyes, 12 had visual field defects present with threshold Amsler grid testing. Tangent screen examination showed defects in 10 of these 12 eyes. The two red grids used were not as sensitive as the threshold grid. Three eyes had metamorphopsia with the white grid which became the site of a visual field defect with threshold testing. Threshold Amsler grid testing is a rapid and sensitive technique for the evaluation of the central 10 degrees of visual field in patients with maculopathies.
journal_name
Ophthalmologyjournal_title
Ophthalmologyauthors
Wall M,May DRdoi
10.1016/s0161-6420(87)33315-9subject
Has Abstractpub_date
1987-09-01 00:00:00pages
1126-33issue
9eissn
0161-6420issn
1549-4713pii
S0161-6420(87)33315-9journal_volume
94pub_type
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