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Abstract #46597 Published in IGR 13-3
Assessment of linear-scale indices for perimetry in terms of progression in early glaucoma
Gardiner SK; Demirel S; Johnson CA; Swanson WHVision Research 2011; 51: 1801-1810
Currently, global indices that summarize the visual field combine sensitivities on a logarithmic (decibel) scale. Recent structure-function models for glaucoma suggest that contrast sensitivity should be converted to a linear scale before averaging across visual field locations, to better relate sensitivity with the number of surviving retinal ganglion cells (RGCs). New indices designed to represent the number of RGCs already lost are described. At least one was found to be a significantly better predictor of subsequent rate of change than traditional Mean Deviation (p=0.014) in participants with glaucomatous optic neuropathy. Issues concerning the creation of optimal global indices are discussed.
S.K. Gardiner. Devers Eye Institute, Legacy Research Institute, 1225 NE 2nd Ave., Portland, OR 97232, United States.
Classification:
6.6.2 Automated (Part of: 6 Clinical examination methods > 6.6 Visual field examination and other visual function tests)
