Classification System for Cataracts
| Autor: | Keiichirou Katou, Hajime Obazawa, Shigemi Okuyama, Fumio Kogure, Itoi M, Kenichi Akiyama, Yoshitaka Obara, Takaaki Fujiwara, Takashi Shibata, Kazuyuki Sasaki |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
medicine.medical_specialty
genetic structures Senile cataract business.industry Lens cortex Eye disease Advanced stage General Medicine medicine.disease eye diseases Sensory Systems Cellular and Molecular Neuroscience Ophthalmology Cataract epidemiology Cataracts Subcapsular opacities medicine sense organs Grading (education) business |
| Zdroj: | Ophthalmic Research. 22:46-50 |
| ISSN: | 1423-0259 0030-3747 |
| DOI: | 10.1159/000267064 |
| Popis: | A cataract classification and grading system for the main purpose of cataract epidemiological studies is proposed by the Japanese Cooperative Cataract Epidemiology Study Group. Cataractous types are classified principally into cortical, nuclear and subcapsular opacities. Stages of cataract advancement are classified into grade I (early stage), grade II (moderate stage) and grade III (advanced stage). Regarding cortical opacities an opacified area obtained from red-reflex images is utilized for grading judgment. Nuclear opacity grading is based on the intensity of scattering at the nucleus. Grading of subcapsular opacities is judged from their extension in the three different pupillary areas. To help grading judgments, standard pictures of cortical and nuclear cataracts are provided. Gradings of lens coloration are divided into pale yellow (grade I), yellow (II), brownish yellow (III) and brown including reddish and black brown (IV). A recording chart is also provided. |
| Databáze: | OpenAIRE |
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