GLOBAL DSR is a comprehensive company offering the sale of Diagnostic, Surgical and Refractive new and used ophthalmic equipment. There are numerous categories of used ophthalmic equipment for the eye care industry offered by GLOBAL DSR, including the Perimeter, also known as the Visual Field Machine or Visual Field Analyzer. A few of the models offered by GLOBAL DSR are the Zeiss EMR Series including the 750i, 745i, and 740i Visual Field Analyzers. Other Perimeters offered by Zeiss are the 740, 745, and 750 Visual Field Analyzer. GLOBAL DSR is also proud to offer the Zeiss Humphrey Matrix 800 & 715, and the Zeiss Humphrey FDT 710. Perimetry tests are used to find certain patterns of vision loss, are useful for finding certain types of eye diseases, and discovering early changes in vision caused by nerve damage from glaucoma. The test is done by having the patient look inside a bowl-shaped instrument called a Perimeter. Lights flash as the patient stares at the center of the ma Read More