Refer to Design Step 1 for introductory information about this design example. Additional information is presented about the design assumptions, methodology, and criteria for the entire bridge, including the steel girder. Figure 3-1 Span Configuration. Figure 3-2 Superstructure Cross Section.
HYPOFLUORESCENCE Hypofluorescence may be caused by 1) blocked fluorescence, which is synonymous with negative fluorescence or transmission decrease, or 2) a vascular filling defect. Blocked fluorescence corresponds to the size, shape, and location of the blocking material seen ophthalmoscopically.
The initial hypofluorescence may be due in part to focal ischemic areas, resulting in nonfilling of the choriocapillaris. (From Schatz H et al: Interpretation of Fundus Fluorescein Angiography, CV Mosby, 1978) FIG. 4. Retinal branch vein occlusion.