Octopus 900 Perimeter

In 1945, Professor Hans Goldmann of the University of Berne, together with Haag-Streit, developed the Manual Goldmann perimeter. This instrument is still the referensce for kinetic perimetry today and all of its capabilities and specifications are built into the Octopus 900. Furthermore, Haag-Streit has pioneered many significant innovations, including automated static perimetry, the G-Program and the direct projection system, as well as fast strategies and outstanding software for visual field analysis. Addressing all major perimetry needs, the Octopus 900 is the perimeter of choice for anyone who wants diagnostic flexibility to analyse, assess and track patients’ visual fields. It makes it possible to run standard central and peripheral visual fields with minimum test duration, seamlessly integrated into your practice environment. This supports high patient throughput and effective practice management. With its built-in reliability features, the Octopus 900 is easy-to-use and delivers results you can trust.

Full Field Standard

 White-on-White Perimetry

 The Octopus 900 performs standard white-on-white threshold testing in just 2–4 minutes in the central visual field. Due to its 90 degree cupula, full 180-degree peripheral testing is possible. This allows for disability testing, including ptosis examination, as well as binocular driving tests.

 Reliable Results Made Easy

Worry less about patient compliance. The Octopus 900 automatically recognises any fixation losses and adjusts patients accordingly until optimal test conditions are achieved. Thus, the Octopus 900 produces results you can always trust.

True Goldmann Kinetic Perimetry

With the Octopus 900, kinetic vectors can be defined anywhere and with all the characteristics available in the Manual Goldmann perimeter. Additionally, user-defined templates help generate fast and reproducible results when defining standard isopters and mapping the blind spot, as well as for ptosis, driving and disability examinations.

Progression Analysis

Immediately Identify Levels of Change

EyeSuite Perimetry software is included as standard, featuring the most advanced EyeSuite Progression analysis for following up visual fields. As recommended by the International Glaucoma Society, the global progression rate is calculated in dB per year, including the probability level. Areas for normal range (grey band), impaired vision (15 dB) and legal blindness (25 dB) provide a starting point for further investigation. Often, progression is local and not noticeable on global progression analysis. No more counting of single points and looking for clusters. EyeSuite does the work for you! The EyeSuite Cluster Trend analysis is based on specific “clusters” of test points that are matched to the nerve fibre bundles, while the Polar Trend analysis allows direct comparison with structural findings. With these two local progression analyses, even small local changes that are not visible at a global level can be easily detected and followed up. Intuitive colour codes save time by immediately identifying levels of change. A red triangle will always indicate significant worsening and a green triangle significant improvement.

Top Fast-Thresholding Strategy

Increased Efficiency

Tendency Oriented Perimetry (TOP) presents a further optimisation in fastthreshold testing by reducing the examination time by nearly 80% to just 2–4 minutescompared to 6–8 minutes (Dynamic strategy) or 10–12 minutes (Normal strategy). The TOP algorithm is a systematic method which takes the correlation of the threshold values in neighbouring locations into account. Since the first test points are presented at a supra-threshold level, even inexperienced patients quickly understand the nature of the test.

Cluster Analysis

Providing Meaningful Results

 Cluster analysis combines high sensitivity with good specificity . Test locations are grouped (clustered) along nerve fibre bundles, to better analyse changes in crucial areas such as the nasal step or the macula. This eliminates the time-consuming method of counting isolated points. A combined probability/deviation graph highlights pathological regions.

Polar Analysis

Combining Structure and Function

 Combining the results of both structure and function (see picture: A) is key to obtaining a comprehensive assessment of the onset and progression of Glaucoma. With the Octopus Polar Analysis, the nerve fibre bundles that are in danger or defective are easily identified. Local defects are projected along the nerve fibres to the optic disk and are represented as red lines (B). The projected defects (C, D) are vertically mirrored and scaled with rings for 10, 20 and 30 dB deviation (E). The Octopus Polar Analysis allows for direct comparison with structural (F) findings .

Fixation Control

Reliable Results Made Easy

Fixation losses due to low patient compliance are a major reason for unreliable visual fields. The Octopus 900 gives you less reason to worry about these. Blink Control, Pupil Position Control and Automated Eye Tracking (AET) continously support the correct patient and eye position for a reliable result you can trust.

Blink Control

Never Miss a Point

Normal blinking prevents dry eyes and helps the patient to relax and concentrate during examination. With Octopus Blink Control, you need never worry again about missing a stimulus presented in static perimetry. Stimuli interrupted by the patient’s blinking are automatically repeated later during the test. This means that every test location is tested reliably.

Pupil Position Control

 Controlled Position

 Maintaining the correct pupil position during examination is essential for correct identification of the location of a defect. If the pupil position changes during stimulus presentation, due either to shifiting of the head or eye movement, the Pupil Position Control pauses the examination automatically until the pupil is recentred. This stimulus is automatically repeated later during the test. The result is a visual field that you can trust.

Automated eye Tracking

Minimise Artefacts

Positioning the pupil in the centre of the trial lens is essential to preventing lens rim and anatomical artefacts. Automated Eye Tracking (AET) recognises the position of the pupil and keeps the pupil centred by automatically moving the head and chin rest into the ideal position. Thus, the Octopus 900 provides optimum conditions for reliable and undelayed results.