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(online only supplement). The relationship between baseline foveal dark-adapted sensitivity and low luminance deficit (LLD) at baseline. There is a strong correlation between foveal dark-adapted sensitivity and the LLD measure (Pearson correlation coefficient=0.55, p=0.0001). The solid symbols indicate those eyes with >=3-line of ETDRS (Early Treatment Diabetic Retinopathy Study) visual acuity (VA) loss at two years.
