Fig. 1.

The LOCS III standard images in an 8.5-inch, 11-inch color transparency as used in the office at the slit-lamp microscopy. The Lens Opacities Classification System version III (LOCS III) is a standardized photographic comparison system for grading the features of cataract. It has been used to grade the type and severity of cataract in cross-sectional studies. It also has been used to grade cataracts at the slit lamp. The brightness of scatter from the nuclear region has been designated nuclear opalescence and the intensity of brunescence, nuclear color. The amount of cortical cataract and the estimated amount of posterior subcapsular cataract is determined by comparing