Quantitating Cataract and Nuclear Brunescence, The Harvard and LOCS Systems
| Autor: | D.M. Singer, Judith Friend, Patricia M. Khu, D. Mccarthy, J. Del Carmen, Leo T. Chylack, John K. Wolfe, Bernard Rosner |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Adult
Male medicine.medical_specialty genetic structures Intraclass correlation Cortical cataract Eye disease Statistics as Topic Sensitivity and Specificity Lens nucleus Cataract Ophthalmology Photography Opalescence Humans Medicine Schools Medical Aged Aged 80 and over business.industry Lens cortex Reproducibility of Results Lens Nucleus Crystalline Lens Cortex Crystalline Middle Aged medicine.disease eye diseases Massachusetts Colorimetry Female sense organs Posterior subcapsular cataract business Kappa Optometry |
| Zdroj: | Optometry and Vision Science. 70:886-895 |
| ISSN: | 1040-5488 |
| DOI: | 10.1097/00006324-199311000-00005 |
| Popis: | Subjective and objective systems are used to quantify cataract at The Center for Clinical Cataract Research. We have described each system and its use, presented data on reproducibility and validity, and for objective systems, demonstrated the correlation to the subjective grade of the cataract as defined by the Lens Opacities Classification Systems, Versions II and III (LOCS II and III). The subjective systems are used to classify nuclear color, nuclear opalescence, cortical cataract, and posterior subcapsular cataract. Reported kappa scores for LOCS II range from 0.85 to 1.0. Intraclass correlation coefficients for LOCS III (r1) range from 0.67 to 0.94. The computerized objective system are: (1) fast spectral scanning colorimetry (FSSC) for assessment of nuclear color (r1 = 0.96 to 0.98); (2) nuclear mean density (NMD) for assessment of nuclear opalescence (r1 = 0.97); and (3) percent area opacity (anterior = a; posterior = p) (OPAC-a and OPAC-p) for assessment of cortical and posterior subcapsular cataract (r1 = 0.92 to 0.96). |
| Databáze: | OpenAIRE |
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