1. The age-related eye disease study (AREDS) system for classifying cataracts from photographs: AREDS report no. 4;Am J Ophthalmol,2001
2. Lens opacities classification system II (LOCS II);Chylack;Arch Ophthalmol,1989
3. The effect of cataract severity and morphology on the reliability of the Lens Opacity Classification System II (LOCS II);Maraini;Invest Ophthalmol Vis Sci,1991
4. Correlation of nuclear cataract lens density using Scheimpflug images with Lens Opacities Classification System III and visual function;Grewal;Ophthalmology,2009
5. The Age-Related Eye Disease Study (AREDS): design implications. AREDS report no. 1;Control Clin Trials,1999