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The disc damage likelihood scale: reproducibility of a new method of estimating the amount of optic nerve damage caused by glaucoma



The disc damage likelihood scale: reproducibility of a new method of estimating the amount of optic nerve damage caused by glaucoma



Transactions of the American Ophthalmological Society 100: 181



The major objective of this study was to test the reproducibility of a new method of estimating the amount of optic disc damage in patients with glaucoma. The Disc Damage Likelihood Scale (DDLS) is based on the appearance of the neuroretinal rim of the optic disc corrected for disc diameter. The eight stages, extending from no damage to far advanced damage, are based on the width of the neuroretinal rim or the circumferential extent of absence of neuroretinal rim. Reproducibility was measured by two masked observers staging 48 optic nerve stereoscopic photographs by two different methods, the cup/disc ratio (c/d) and the DDLS. Also, reproducibility was assessed by three observers examining 34 eyes of 24 patients. With regard to the photographs, the intraobserver and interobserver reproducibility was better using the DDLS than the c/d ratio (98% versus 85% for intraobserver of reproducibility, and 85% versus 74% for interobserver reproducibility). The DDLS correlated better with the Humphrey Visual Field than did any Heidelberg Retina Tomograph parameter. In a clinical setting, the DDLS is as reproducible as, or more reproducible than, the c/d ratio system of estimating the amount of disc damage in patients with glaucoma.

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Accession: 047611354

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PMID: 12545692


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