Technique for determining glaucomatous visual field progression by using animation graphics
| Autor: | Balwantray C. Chauhan, Stephen M. Drance, Richard P. Mills, Elliot B. Werner, Marc F. Lieberman, Raymond P. LeBlanc |
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| Rok vydání: | 1994 |
| Předmět: |
Adult
genetic structures Concordance Ocular hypertension Glaucoma Optics medicine Computer Graphics Humans Intraindividual comparison Graphics Aged Aged 80 and over Observer Variation business.industry Follow up studies Animation Middle Aged medicine.disease eye diseases Visual field Ophthalmology Optometry Visual Field Tests Ocular Hypertension Visual Fields business Glaucoma Open-Angle Follow-Up Studies |
| Zdroj: | American journal of ophthalmology. 118(4) |
| ISSN: | 0002-9394 |
| Popis: | The first two visual field examinations of each of 16 glaucoma suspects and 16 glaucoma patients, who were followed up for a median of 7.46 years with seven examinations, were averaged. Three-dimensional color-coded images of the visual field were then generated. After correcting for test-retest variability, the images, as well as additional interpolated images, were aligned and presented in rapid succession to create an animation sequence. Five glaucoma specialists trained themselves to classify the visual fields as either progressing or not progressing. The interobserver and intraobserver agreement rates were then calculated. Perfect agreement (100% concordance) between the observers was obtained for 18 (56.3%) subjects, and at least 80% concordance was obtained for 27 (84.4%) subjects. Of the eight sequences that were repeated to test intraobserver agreement, four of the five observers had a value of at least 87.5%. |
| Databáze: | OpenAIRE |
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