LISTING #1322330
  • Condition:
  • Used - Excellent
  • Date updated:
  • June 11, 2019


Heidelberg HRT-II HRT 2 Retinal Tomograph Glaucoma Tomographer

The Heidelberg Retina Tomograph (HRT) is a confocal scanning laser ophthalmoscope. A laser light scans the retina in 24 millisecond sequential scans, starting above the retinal surface, then capturing parallel images at increasing depths. The stacks of images can be combined to create a three-dimensional (3-D) topographic image of the retina. Images are aligned and compared using TruTrack™ software for both individual examinations and for detecting change between examinations. The same technology is used in the HRT Retina Module.

3-D Optic Disc Topography vs. Tomography

When applying the technology to glaucoma, the HRT takes data from a 3-D stack of tomographic images of the optic nerve and retinal nerve fiber layer (RNFL), aligns the images and computes a 3-D topographic map of the surface of the retina. This 3-D topographic map is analyzed for signs of glaucomatous damage and the results are displayed on either a single eye examination report or on an OU examination report.

24-Millisecond Scan Helps Avoid Eye Movement Artifact

The HRT scans the retina in 24-milliseconds, faster than most involuntary eye movements (micro saccades occur in 30-50 milliseconds) and faster than voluntary eye movements (macro saccades occur in 150 or more milliseconds). Each scan is composed of 384 x 384 pixels for a total of 147,456 data points covering a 15-degree area of the retina. Other technologies, such as time-domain OCT, scan slower than 24-milliseconds, contributing to motion artifact (blurring of the data).

About Us:

GLOBAL DSR is a comprehensive company offering high end, quality diagnostic, surgical, and refractive equipment. As a company, GLOBAL DSR combines outstanding business practices with an unparalleled approach to customer service. We have built a solid reputation of trust and ethical business practices in the eye care equipment industry.

GLOBAL DSR strives for 100% customer satisfaction by delivering quality equipment and full customer service with every transaction. Our comprehensive approach to the buying and selling of diagnostic, surgical and refractive equipment elevates our company in this industry. Our experienced sales and marketing staff are ready to assist every client with their search for the right equipment, at the right price, while our trained equipment technicians are always on hand to help clients in setting up their practice or surgery center.


The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. If so, do not purchase this item unless you are an authorized purchaser. If the item is subject to FDA regulation, I will verify your status as an authorized purchaser of this item before shipping of the item. If you have questions about legal obligations regarding sales of medical devices, you should consult with the FDA's Center for Devices and Radiological Health:



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