To the Editor. —In clinical practice, dystrophic lesions of the anterior visual pathways may be misdiagnosed as acquired lesions, and vice versa.1 In acquired defects, transient changes in visual function often occur,2 whereas they rarely occur in dystrophic disorders of these neural pathways.OCTOPUS (Interzeag AG, Schlieren, Switzerland) automated perimeter programs offer two modes of evaluating transient changes in visual function, according to the program selected: (1) the so-called root mean square fluctuation, or (2) the "short-term fluctuation" (SF), both of which require a time interval of less than 15 minutes between threshold testings. However, there are indications that the SF index is the more accurate means of measuring these transient changes in visual function.3We therefore analyzed SF values (computed by the G1 program) obtained (1) from 41 examinations evaluating defects in optic neuritis or anterior visual pathway compression, and compared these values with those obtained
Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature
Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal
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