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Methods of Clinical Cataract Grading: Two Systems Compared

1990; American Medical Association; Volume: 108; Issue: 9 Linguagem: Inglês

10.1001/archopht.1990.01070110025006

1538-3601

J M Sparrow,

Intraocular Surgery and Lenses

To the Editor. —Chylack et al 1 are to be congratulated on the development of the Lens Opacities Classification System II (LOCS II) method. Their pursuit of excellence has been rewarded in a system that is repeatable, and can be applied equally to in vivo clinical slit-lamp grading as well as to the grading of cataract photographs. In their article, the authors compare the LOCS II system with the Oxford Clinical Cataract Classification and Grading System. 2 They make the point that the Oxford system is "much more complex than the LOCS II." This comment is true of the system as a whole, the philosophy behind the design of the system being to provide a composite system for the quantification of a selection of common cataract features, in addition to those major features documented by LOCS II. However, some investigators may prefer to limit themselves to the quantification of major