ZEISS Cirrus HD-OCT 4000



ZEISS Cirrus HD-OCT 4000 (Cirrus HD-OCT or Cirrus) enables examination of the posterior and anterior of the eye at an extremely fine spatial scale, without surgical biopsy or even any contact with the eye.

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The Cirrus HD-OCT (also known as Cirrus4000) builds on and refines the retinal imaging technology first introduced with the ZEISS Stratus OCT. Employing the advanced imaging technology of spectral domain optical coherence tomography, Cirrus HD-OCT acquires OCT data about 70 times faster (27,000 vs. 400 A-scans per second) and with better resolution (5 μm vs. ~10 μm axial resolution in tissue), compared to first-generation OCT technology. Cirrus acquires whole cubes of OCT image data, composed of hundreds of line scans, in about the same time as Stratus acquires a six-line scan. You can view these data cubes in three planes, or through three dimensions, giving you access to an extensive amount of retinal image data in one scan.

  • Unprecedented Visualization of Anatomical Details
  • HD Layer Maps
  • HD Enhanced Raster Scan
  • Cirrus HD-OCT Scan Engine
  • Correlation Between OCT Scan and Fundus Image
  • Superior Image Data
  • Designed for efficiency
  • Small footprint and integrated design are ideal for crowded or busy practice
  • 90-degree orientation facilitates observation of patient throughout exam
  • Advanced optics aid in the examination of patients with cataracts. Dilation is not required even for pupils as small as 2.5 mm
  • Mouse Driven Alignment™ delivers superior image capture and analysis in just a few clicks, resulting in reduced chair time for the patient
  • Auto Patient Recall™ assures patient position and instrument setting are repeated from previous visit


  • Axial resolution: 5 μm (in tissue)
  • Transverse resolution: 15 μm (in tissue)
  • Scan speed: 27,000 A-scans per second
  • A-scan depth: 2.0 mm (in tissue), 1024 points
  • Optical source: superluminescent diode (SLD), 840 nm
  • Fundus Imaging: Line scanning ophthalmoscope (LSO)
  • Live during scanning
  • Transverse resolution: 25 μm (in tissue)
  • Optical source: superluminescent diode (SLD), 750 nm
  • Field of view: 36° x 30°
  • Scan Patterns: Macular Cube 200 x 200 Combo: 200 horizontal scan lines comprised of 200 A-scans
  • Macular Cube 512 x 128 Combo: 128 horizontal scan lines comprised of 512 A-scans
  • 5 Line Raster: 4096 A-scans per B-Scan (adjustable length, spacing and orientation)
  • Focus Adjustment Range: –20D to +20D (diopters)
  • Fixation: Internal and external
  • Pupil Size Requirement: ≤ 2.0 mm (≥ 3.0 mm optimal for LSO)
  • Integrated 15” color flat panel display
  • Electrical: 100–120V~, 50/60Hz, 5A 220–240V~, 50/60Hz, 2.5A