Author Archives: Brian Myrback

OCT Technology

Optical Coherence Tomography (OCT) is a fundamentally new type of optical imaging modality. OCT performs high-resolution, cross-sectional tomographic imaging of the internal microstructure in materials and biologic systems by measuring backscattered or back reflected light. OCT images are two-dimensional data sets which represent the optical backscattering in a cross-sectional plane through the tissue. Image resolutions of 1 to 15 µm can be achieved one to two orders of magnitude higher than conventional ultrasound. Imaging on the OCT can be performed in situ and in real time. The unique features of this technology enable a broad range of research and clinical applications. OCT, imaging the internal cross-sectional microstructure of tissues using measurements of optical backscattering or back reflection, was first demonstrated in the early nineties. OCT imaging was performed in vitro in the human retina and in atherosclerotic plaque as examples of imaging in transparent, weakly sca Read More

Excimer Lasers

The development of the LASIK Excimer Laser is the key element that has made laser eye surgery possible. Created by a major technology company, Excimer Lasers, derived from the terms excited and dimmers, use reactive gases, such as chlorine and fluorine, mixed with inert gases such as argon, krypton or xenon, commonly referred to as “premix”. When these gases are electrically stimulated, a pseudo molecule is produced that, when lased, produces light in the ultraviolet range. Read More

Used Equipment

GLOBAL DSR is a comprehensive company offering the purchasing & sales of Diagnostic, Surgical and Refractive new and used ophthalmic equipment. Several categories of used ophthalmic equipment we offer include Excimer Lasers, Femtosecond Lasers, Fundus Cameras, Microkeratomes, OCT Technology, Topographers, Visual Field Analyzers, YAG Lasers and more! As an industry leader in the used ophthalmic equipment marketplace, we also provide equipment service, financing, and consultation to industry professionals such as ophthalmologists, optometrists, clinics, and surgery centers. There are many ophthalmic equipment options for industry professionals, and GLOBAL DSR is proud to offer the following manufactures: Alcon, Abbott Medical Optics (AMO), Bausch & Lomb (Technolas 20/20), Ziemer, Canon, Heidelberg Engineering, Topcon, Zeiss Meditec, RightMed (S4 Optik), SciCan, & Tomey just to name a few! Purchasing used ophthalmic equipment rather than new ophthalmic equipment can save eye care Read More

Excimer Lasers

The development of the LASIK Excimer Laser is the key element that has made laser eye surgery possible. Created by a major technology company, Excimer Lasers, derived from the terms excited and dimmers, use reactive gases, such as chlorine and fluorine, mixed with inert gases such as argon, krypton or xenon, commonly referred to as “premix”. When these gases are electrically stimulated, a pseudo molecule is produced that, when lased, produces light in the ultraviolet range. The LASIK Excimer Laser is a cool laser, which means that it does not heat up the surrounding air or surfaces. Instead, a very tightly-focused beam of ultraviolet light is emitted. The ultraviolet light is absorbed by the upper layer of the surface that it contacts. The sheer amount of ultraviolet light is too much for the cornea of the eye to absorb, resulting in the breakdown of the molecular bonds of the material, thus reshaping the surface of the cornea. The ultraviolet beam of light created by the E Read More

Visual Fields

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