Petzold, A;
Plant, GT;
(2000)
Failure to detect bitemporal field defects due to chiasmal compression on a screening perimetry protocol.
Neuro-Ophthalmology
, 24
(2)
pp. 357-361.
10.1076/noph.24.2.357.7156.
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Abstract
Chiasmal compression can present with a bitemporal decrease of colour and contrast sensitivity. Here, we compare the results obtained by the Amsler grid, confrontation to show red desaturation, the Tinsley suprathreshold, and the Humphrey 24-2 protocol in a patient with a pituitary adenoma. The initial Amsler chart was positive. The suprathreshold protocol, used as a screening method in many centers, gave a false-negative result. We discuss this important practical point in relation to the different stimulus attributes.
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