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  • Title: Subjective (LOCS II) versus objective (BGS) measures of cortical and subcapsular cataracts in retroillumination photographs.
    Author: Khu PM, Kashiwagi T.
    Journal: Ophthalmic Res; 1990; 22 Suppl 1():68-70. PubMed ID: 2388754.
    Abstract:
    96 black-and-white Neitz retroillumination photographs were graded subjectively using the Lens Opacities Classification System Version II (LOCS II). They were also measured objectively using the background subtraction (BGS) analysis. Subjective and objective BGS gradings were compared and showed good agreement (kappa = 0.78 for cortical and 0.78 for posterior subcapsular cataracts) and good correlation (correlation coefficient = 0.82 for cortical and 0.84 for posterior subcapsular cataracts; Spearman rank analysis).
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