Optimum Parameters for Short‐Wavelength Automated Perimetry
Optimum Parameters for Short‐Wavelength Automated Perimetry
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DOI：
10.1097/00061198-199612000-00004
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发表时间：
1996-12
影响因子：
2
通讯作者：
P. Sample;C. Johnson;G. Haegerstrom‐Portnoy;A. Adams
中科院分区：
文献类型：
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作者：
P. Sample;C. Johnson;G. Haegerstrom‐Portnoy;A. Adams
PurposeTo determine the optimum parameters for short-wavelength automated perimetry (SWAP) and to recommend these for standardization of the procedure. MethodsWe used a variety of stimulus and background configurations to determine the optimum background spectral distribution and luminance, and the optimum target spectral distribution, maximum luminance, and duration. We measured threshold versus intensity curves to determine which combination provided (a) the greatest isolation of the short-wavelength sensitive mechanisms and (b) the largest dynamic range for perimetry. We also evaluated the effect of lens absorption and cataract on these two factors. ResultsA broad-band yellow background at 100 candela/m2 with a narrow-band 440-nm (27-nm half-bandwidth), 1.8° diameter (Goldmann size V) stimulus presented for 200 ms was optimum at all retinal eccentricities. Specific recommendations for how to modify existing perimeters are given. ConclusionAgreement regarding the optimum parameters for SWAP should lead to standardization of the test that will facilitate comparison of results from different centers. Normative data can be collected at several sites and incorporated into statistical analysis packages currently available with various perimeters. This will greatly improve the clinical utility of this test.
