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We described the system for grading lens opacities using stereoscopic digital fundus reflex photographs in the Age-Related Eye Disease Study 2 (AREDS2) and compared reproducibility with the AREDS lens grading system, which used retroillumination film images.

Evaluation of Optimized Digital Fundus Reflex Photographs for Lens Opacities in the Age-Related Eye Disease Study 2: AREDS2 Report 7