Lens Opacities Classification System

Leo T. Chylack Jr, MD; M. Cristina Leske, MD, MPH; Robert Sperduto, MD; Patricia Khu, MD; Daniel McCarthy, COA
Arch Ophthalmol. 1988;106(3):330-334. doi:10.1001/archopht.1988.01060130356020.
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• The Lens Opacities Classification System (LOCS) is a simple system for classifying age-related human lens opacities at the slit lamp or in retroilluminated and slit-lamp photographs. The system employs a set of standard Neitz CTR retroilluminated black-and-white photographs for classification of cortical and posterior subcapsular cataracts and a single color slit-lamp photograph for classification of nuclear color and opalescence. We present a detailed description of the system.


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