The ZEISS Cirrus HD-OCT 4000 (Cirrus HD-OCT or Cirrus) enable 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. The Cirrus HD-OCT builds on and refines the retinal imaging technology first introduced with the ZEISS Stratus OCT™. HD-OCT stands for "high-definition optical coherence tomography."
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.
Intended Use
The Cirrus HD-OCT with Retinal Nerve Fiber Layer (RNFL), Macular, Optic Nerve Head, and Ganglion Cell Normative Databases is indicated for in-vivo viewing, axial cross-sectional, and three-dimensional imaging and measurement of anterior and posterior ocular structures.
Indications for Use
The Cirrus HD-OCT is a non-contact, high resolution tomographic and biomicroscopic imaging device. It is indicated for in-vivo viewing, axial cross-sectional, and three-dimensional imaging and measurement of anterior and posterior ocular structures, including cornea, retina, retinal nerve fiber layer, ganglion cell plus inner plexiform layer, macula, and optic nerve head. The Cirrus normative databases are quantitative tools for the comparison of retinal nerve fiber layer thickness, macular thickness, ganglion cell plus inner plexiform layer thickness, and optic nerve head measurements to a database of normal subjects. The Cirrus HD-OCT is intended for use as a diagnostic device to aid in the detection and management of ocular diseases including, but not limited to, macular holes, cystoid macular edema, diabetic retinopathy, age-related macular degeneration, and glaucoma.
Note: The Cirrus HD-OCT is not intended to be used as the sole diagnostic for disease.
Essential Performance
The Essential Performance of the instrument is to provide accurate measurements of anterior and posterior ocular structure.
Patient Population
The Cirrus HD-OCT may be used on all adults in need of diagnostic evaluation of the eye. This includes (but is not limited to) patients with the following disabilities or challenges:
• Wheelchair user
• Very low or not measurable visual acuity
• Fixation problems
• Postural problems
• Deafness
• Large body, but not those above 99th percentile based on anthropomorphic data
There is a general requirement that the patient be able to sit upright and be able to place their face in the chin and forehead rest of the instrument (with or without supplemental human or mechanical support).
Cirrus HD-OCT is designed for in-vivo viewing, axial cross-sectional, and three-dimensional imaging and measurement of anterior and posterior ocular structures.
Specifications:
HD-OCT Imaging
Methodology: Spectral Domain OCT
Optical Source: superluminescent diode (SLD), 840 nm
Optical Power: < 725 μW at the cornea
Scan Speed: 27,000 A-scans per second
A-Scan depth: 2.0 mm (in tissue), 1024 points
Axial resolution: 5 μm (in tissue)
Transverse resolution: 15 μm (in tissue)
Fundus Imaging
Methodology: Line scanning ophthalmoscope
Live Fundus Image: During alignment and during OCT scan
Optical Source: Superluminescent diode (SLD), 750 nm
Optical Power: < 1.5 mW at the cornea
Field of View: 36 degrees W x 30 degrees H
Frame rate: >20 Hz
Transverse resolution: 25 μm (in tissue)
Iris Imaging
Methodology: CCD Camera
Resolution: 1280 x 1024
Live iris image: During alignment
Electrical, Physical and Environemental
Weight: 38kg (83 lbs)
Dimensions: 65L x 44W x 53H (cm)
Fixation: Internal, external
Internal fixation focus adjustment: -20D to +20D (diopters)
Input devices: Keyboard, mouse
Electrical rating (115V) Single Phase, 100/120V~ systems:50-60Hz, 5A
Fuse rating (115V) T 5A 250V
Electrical rating (230V) Single Phase, 220/240V~ systems:50-60 Hz, 2.5A
Fuse rating (230V) Fuse rating: T 5A 250V
Convenience Receptacle output ratings 115V~, 0.5 A Max, 50-60 Hz
Temperature (transport and storage) -40º to +70º C
Relative humidity (transport and storage) 10% to 100%, including condensation
Atmospheric pressure (transport and storage): 500 hPa to 1060 hPa
Temperature (operation) +10º to +35º C
Relative humidity (operation) 30% to 75%, excluding condensation
Atmospheric Pressure (operation) 700 hPa to 1060 hPa
Computer
• High performance multi-core processor
• Internal storage: > 80,000 scans
• CD-RW, DVD-ROM drive
• Integrated 15" color flat panel display
