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Subject: офтальмология ophtalm. Уважаемые врачи, в чем измеряется показатель помутнения стекловидного тела?В диоприях? The primary efficacy assessment was vitreous haze graded from 0 to +4, based on a published color photographic scale. This was modified to include a +1.5 grade to improve the accuracy of grading patients with scores < +2. Заранее спасибо |
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По-моему, единицы измерения нет. Просто цифры от нуля до восьми. Calibrated Bangerter diffusion filters inducing incremental decrements of spatial contrast were placed in front of the camera lens while photographing a normal eye to simulate vitreous haze. The photographs were digitized and an ordinal scale was created from 0 (none) to 8 (highest level of opacification at which fundus details could be seen). The scale steps correspond approximately to decimal Snellen visual acuities of 1.0, 0.8, 0.4, 0.2, 0.1, 0.04, 0.02, 0.01, and 0.002, with approximately 0.3 log step between each step. |
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