[Quantification of senile cataract in split-lamp images of the Zeiss SLC measurement system]

The Zeiss SLC measuring system for examining the anterior segment in slit light permits direct digital image storage and analysis. For long-term studies the reproducibility of individual images can be improved. Furthermore, the data can be quickly processed to yield indices which can be used to characterize the cataract: 1) the integral of an axial densitogram as a criterion of average lens opacity, and 2) the difference between the linear regressions of the densitograms of the anterior and posterior lens halves as a criterion of cataract form (e.g., nuclear vs. cortical cataract).