Multifocal blue-on-yellow visual evoked potentials in early glaucoma. 2007

Alexander Klistorner, and Stuart L Graham, and Alessandra Martins, and John R Grigg, and Hemamalini Arvind, and Rajesh S Kumar, and Andrew C James, and Francis A Billson
Department of Ophthalmology, Save Sight Institute, University of Sydney, Sydney, Australia.

OBJECTIVE To determine the sensitivity and specificity of blue-on-yellow multifocal visual evoked potentials (mfVEPs) in early glaucoma. METHODS Cross-sectional study. METHODS Fifty patients with a confirmed diagnosis of early glaucoma and 60 normal participants. METHODS Black-and-white mfVEPs and blue-on-yellow mfVEPs were recorded using the Accumap version 2.0 (ObjectiVision Pty. Ltd., Sydney, Australia). All patients also underwent achromatic standard automated perimetry (SAP). METHODS Multifocal VEP amplitude and latency values in glaucoma patients were analyzed and compared with those of the normal controls. RESULTS Based on the definition of visual field defect, in the group of glaucomatous eyes with SAP defects, amplitude of blue-on-yellow mfVEP was abnormal in all 64 cases (100% sensitivity), whereas black-and-white mfVEP missed 5 cases (92.2% sensitivity). Generally, larger scotomata were noted on blue-on-yellow mfVEP compared with black-and-white mfVEP for the same eyes. There was high topographic correspondence between SAP and amplitude of blue-on-yellow mfVEP and significant (P<0.0001) correlation between them (correlation coefficient, 0.73). Abnormal amplitude was detected in 3 of 60 eyes of control subjects (95% specificity). There was, however, no correlation between visual field defect and latency delay in glaucoma patients. Although there was a significant difference between averaged latency of control and glaucoma eyes, values considerably overlapped. CONCLUSIONS The blue-on-yellow mfVEP is a sensitive and specific tool for detecting early glaucoma based on amplitude analysis.

UI MeSH Term Description Entries
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D009898 Optic Disk The portion of the optic nerve seen in the fundus with the ophthalmoscope. It is formed by the meeting of all the retinal ganglion cell axons as they enter the optic nerve. Blind Spot,Optic Disc,Optic Nerve Head,Optic Papilla,Blind Spots,Disc, Optic,Disk, Optic,Head, Optic Nerve,Nerve Head, Optic,Optic Discs,Optic Disks,Optic Nerve Heads,Optic Papillas,Papilla, Optic,Papillas, Optic,Spot, Blind
D009901 Optic Nerve Diseases Conditions which produce injury or dysfunction of the second cranial or optic nerve, which is generally considered a component of the central nervous system. Damage to optic nerve fibers may occur at or near their origin in the retina, at the optic disk, or in the nerve, optic chiasm, optic tract, or lateral geniculate nuclei. Clinical manifestations may include decreased visual acuity and contrast sensitivity, impaired color vision, and an afferent pupillary defect. Cranial Nerve II Diseases,Foster-Kennedy Syndrome,Optic Disc Disorders,Optic Disk Disorders,Optic Neuropathy,Second Cranial Nerve Diseases,Cranial Nerve II Disorder,Neural-Optical Lesion,Disc Disorder, Optic,Disk Disorder, Optic,Disorder, Optic Disc,Foster Kennedy Syndrome,Lesion, Neural-Optical,Neural Optical Lesion,Neural-Optical Lesions,Neuropathy, Optic,Optic Disc Disorder,Optic Disk Disorder,Optic Nerve Disease,Optic Neuropathies,Syndrome, Foster-Kennedy
D011237 Predictive Value of Tests In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test. Negative Predictive Value,Positive Predictive Value,Predictive Value Of Test,Predictive Values Of Tests,Negative Predictive Values,Positive Predictive Values,Predictive Value, Negative,Predictive Value, Positive
D003430 Cross-Sectional Studies Studies in which the presence or absence of disease or other health-related variables are determined in each member of the study population or in a representative sample at one particular time. This contrasts with LONGITUDINAL STUDIES which are followed over a period of time. Disease Frequency Surveys,Prevalence Studies,Analysis, Cross-Sectional,Cross Sectional Analysis,Cross-Sectional Survey,Surveys, Disease Frequency,Analyses, Cross Sectional,Analyses, Cross-Sectional,Analysis, Cross Sectional,Cross Sectional Analyses,Cross Sectional Studies,Cross Sectional Survey,Cross-Sectional Analyses,Cross-Sectional Analysis,Cross-Sectional Study,Cross-Sectional Surveys,Disease Frequency Survey,Prevalence Study,Studies, Cross-Sectional,Studies, Prevalence,Study, Cross-Sectional,Study, Prevalence,Survey, Cross-Sectional,Survey, Disease Frequency,Surveys, Cross-Sectional
D003941 Diagnostic Techniques, Ophthalmological Methods and procedures for the diagnosis of diseases of the eye or of vision disorders. Diagnostic Technic, Ophthalmological,Diagnostic Technics, Ophthalmologic,Diagnostic Technics, Ophthalmological,Diagnostic Technique, Ophthalmological,Diagnostic Techniques, Ophthalmologic,Ophthalmological Diagnostic Technic,Ophthalmological Diagnostic Technics,Ophthalmological Diagnostic Technique,Ophthalmological Diagnostic Techniques,Technic, Ophthalmological Diagnostic,Technics, Ophthalmological Diagnostic,Technique, Ophthalmological Diagnostic,Techniques, Ophthalmological Diagnostic,Diagnostic Technic, Ophthalmologic,Diagnostic Technique, Ophthalmologic,Ophthalmologic Diagnostic Technic,Ophthalmologic Diagnostic Technics,Ophthalmologic Diagnostic Technique,Ophthalmologic Diagnostic Techniques,Technic, Ophthalmologic Diagnostic,Technics, Ophthalmologic Diagnostic,Technique, Ophthalmologic Diagnostic,Techniques, Ophthalmologic Diagnostic
D005074 Evoked Potentials, Visual The electric response evoked in the cerebral cortex by visual stimulation or stimulation of the visual pathways. Visual Evoked Response,Evoked Potential, Visual,Evoked Response, Visual,Evoked Responses, Visual,Potential, Visual Evoked,Potentials, Visual Evoked,Response, Visual Evoked,Responses, Visual Evoked,Visual Evoked Potential,Visual Evoked Potentials,Visual Evoked Responses
D005188 False Negative Reactions Negative test results in subjects who possess the attribute for which the test is conducted. The labeling of diseased persons as healthy when screening in the detection of disease. (Last, A Dictionary of Epidemiology, 2d ed) False Negative Reaction,Reaction, False Negative,Reactions, False Negative
D005902 Glaucoma, Open-Angle Glaucoma in which the angle of the anterior chamber is open and the trabecular meshwork does not encroach on the base of the iris. Glaucoma Simplex,Glaucoma, Pigmentary,Glaucoma, Simple,Open-Angle Glaucoma,Chronic Primary Open Angle Glaucoma,Glaucoma, Compensated,Glaucoma, Compensative,Glaucoma, Open Angle,Glaucoma, Primary Open Angle,Glaucoma, Secondary Open Angle,Primary Open Angle Glaucoma,Secondary Open Angle Glaucoma,Compensated Glaucoma,Compensative Glaucoma,Open Angle Glaucoma,Open Angle Glaucomas,Open-Angle Glaucomas,Pigmentary Glaucoma,Simple Glaucoma,Simplex, Glaucoma,Simplices, Glaucoma
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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