Compass

Compass is the first Fundus Automated perimeter capable of performing standard 24-2 visual field testing, delivering TrueColor confocal images at the same time.

COMPASS is a scanning ophthalmoscope combined with an automatic perimeter that provides confocal images of the retina, as well as measurements of retinal threshold sensitivity, under non-mydriatic conditions.

Retinal tracking is at the heart of Fundus Automated Perimetry.

Infrared images, acquired at the rate of 25 images per second, allow for continuous, automated, tracking of eye movements. Determination of eye movements yields to Fixation Analysis, where the location of the functional site of fixation and its stability are computed.

Fixation analysis is unique to Fundus Automated Perimetry. Retinal tracking also yields to active compensation of fixation losses, with perimetric stimuli being automatically re-positioned prior to projection based on the current eye position. This mechanism is critical to ensure accurate correlation between function (i.e. retinal threshold values) and structure (retinal appearance).

Compensation of eye movements takes place before and during the projection of a certain stimulus. In absence of this mechanism, a normal 2-3 degrees shift in eye position occurring at the time of projection of a certain stimulus would easily produce an artifact in VF results, with a wrong sensitivity being reported at that specific location.

Fundus Automated Perimetry

Fundus automated perimetry is a technique that images the retina during visual field testing, enabling a correlation to be made between visual function and retinal structure.1

Advantages of Fundus Automated Perimetry over Standard Automated Perimetry include the possibility to measure sensitivity at specific retinal locations, higher accuracy thanks to retinal-tracking based compensation of eye movements and the simultaneous assessment of function (expressed by retinal sensitivity) and structure (images of the ONH, of the RNFL and of the retina). Fundus Automated Perimetry provides a simultaneous, quantitative assessment of fixation characteristics.

Use of Fundus Automated Perimetry in the clinical management of glaucoma has been limited so far, as available systems were lacking compliance with the standards of automated perimetry. COMPASS overcomes such limitations and brings visual field analysis to the next level!

In particular COMPASS, for the first time, extends field coverage to 30° + 30° and employs luminance parameters and a sensitivity scale as used in standard automated perimetry.

1 Crossland et al., 2012 2Also referred as “microperimetry”


Benefits

    Combined structure and function analysis
    High test – retest repeatability
    Reliable automated follow up with combined structure-function progression analysis
    High-resolution TrueColor Confocal Imaging of the retina & Outstanding 3D Viewing of Optical Disk Details
    Comprehensive VFA & Fundus Related reports
    Automatic refractive correction, NO trials lens required!
    More patient comfort: test can be suspended at any time without data loss

As a perimeter, the system offers full compatibility with standard 24-2 visual field testing and contains an age-matched database of retinal sensitivity in normal subjects.

Fundus-related Visual Field Test
    30-2, 24-2 and 10-2 Patterns
    60° TrueColor Confocal Image of the retina & NEW Bi-Focal 3D ONH Viewing
    Active Retinal Tracking Compensating for Poor Patient Fixation
    NEW Supra-Threshold Testing (24-2 ST)
    Extreme ease of use & minimal operator training required
    Ethernet connectivity & remote browser-based Reviewing System
    DICOM compatibility (modality worklist)
    Compact & clean design, No additional PC required